HOCINE Belhouchet
بلهوشات حسين
hocine.belhouchet@univ-msila.dz
06 65 61 89 19
- Departement of Physics
- Faculty of Sciences
- Grade Prof
About Me
Doctorat en sciences. in Université de Sétif
Research Domains
Ceramics, Composites, Biomaterials, Alloys,...
LocationMsila, Msila
Msila, ALGERIA
Code RFIDE- 2023
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master
Houichi elkamila
تحضير اليليميت إنطلاقا من الفوسفات الطبيعي وخبث الألمنيوم المستخرج من مصنع (ALGAL Plus)
- 2022
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Doctorat soutenu
DJOUALLAH Samira
Influence des additions sur le frittage de phosphate naturel
- 2022
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master
REFICE Elhamdi
Influence de l'ajout de l'ajout de la sphalérite sur la préparation de yeelimite à partir du phosphate naturel
- 2021
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Doctorat soutenu
KHERIFI Djelel
Development of phosphocalcic bioceramics from natural phosphate
- 2021
- 2020
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Doctorat soutenu
KENZOUR Abdelghani
Elaboration et caractérisation d'un phosphate tricalcique à partir du kaolin et de phosphate naturel
- 2020
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master
HAMMOU Zeyneb
Effet des additifs sur les propriétés de yeelimite élaborée à partir de matériaux locaux
- 2019
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Doctorat soutenu
Mokhtari Afaf
تحضير و دراسة مواد خزفية إنطلاقا من الفوسفات الطبيعي و مسحوق الألمنيوم
- 11-06-2008
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Doctorat en sciences
Elaboration et caractérisation d’un composite à dispersoïdes à base d’alumine et de zircon - 31-01-2001
- 30-06-1997
- 1974-09-03 00:00:00
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HOCINE Belhouchet birthday
- 2024-01-20
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2024-01-20
Sustainable porcelain ceramics production using local raw materials and recycled automotive glass
The main objective of this research is the explanation of the replacement of feldspar limestone imported from Spain with recycled automotive glass, in order to reduce waste and promote environmental sustainability. Details and efforts of making porcelain ceramics from local raw materials such as quartz, kaolin and glass are also given. Replacing the feldspar with reclaimed automotive glass shows the effect of the Na2O and CaO solvents contained in the glass on the sintering and crystallization of the studied porcelain. The results showed that the added glass contributes to the reduction of the density and the acceleration of the sintering process, by occupying the sites of the open spaces, observed in the samples not containing feldspars. By reaching a nonporous ratio at a temperature of 1000∘C, the melting of the material is accelerated due to the dissolved oxides it contains, in addition to the linear shrinkage rate in samples that contain a lot of glass reaching the normal level of porcelain (about 12%) at low temperature compared to ordinary porcelain.
Citation
Hocine BELHOUCHET , , (2024-01-20), Sustainable porcelain ceramics production using local raw materials and recycled automotive glass, Modern Physics Letters B, Vol:2450064, Issue:2450064, pages:2450064, world scientific
- 2023-10-22
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2023-10-22
العوازل و الإقتران الفيزيائ
بسم الله الرحمـن الرحيـم الحمد لله رب العالمين و الصلاة و السلام على أشرف المرسلين سيدنا محمد (صلى الله عليه و سلم) و على آله و صحبه أجمعين. إن التحدي الحقيقي الذي يواجهنا في وقتنا الحاضر هو قضية التعريب التي أخذت أبعاداً أهم وأعمق فقد ابتعدت اللغة العربية خلال الاحتلال الفرنسي عن الكثير من مواقعها، وفُرضت الفرنسية لغة أساسية للتعليم والإدارة والاقتصاد، بدعوى أنها لغة العلم و التطور. غير أن الأبحاث و الدراسات الحديثة أكدت بأن قدرة استيعاب الفرد بلغته الأم أفضل بكثير ، لأن الإبداع و الابتكار و حتى التفكير مرتبطون بشكل أساسي باللغة القومية لأي أمة. و حتى ندحض تلك الأقاويل بأن اللغة العربية قاصرة أمام اللغات الأخرى و أنها غير قادرة على استيعاب تطورات العصر و خاصة في مجال التعليم العالي بكل فروعه العلمية و إنطلاقا من مقولة : "لم تتطور أمة بغير لغتها"، كان هذا العمل المتواضع و الذي يتعلق بمقياس العوازل و الإقتران الفيزيائي الذي يدرس لطلبة السنة الثانية ماستر فيزياء المواد بجامعة محمد بوضياف بالمسيلة. تم وضع هذه المطبوعة بشكل ملائم للطلبة الجامعيين الذين يهتمون بدراسة المواد و خاصة الفيزيائيين منهم، كما تم اختيار محتوياتها لكي تؤكد الطرق الأساسية لدراسة الخصائص العزلية للمواد واعتماد هذه الخصائص على التركيب البلوري و البنيوي للمادة، حيث تم عرضها بشكل مبسط ليسهل تناول مادتها العلمية ولتكون مرجعا مفيدا لطلاب الفيزياء والكيمياء بكلية العلوم و بعض اقسام كلية التكنولوجيا.
Citation
HocineBELHOUCHET , ,(2023-10-22); العوازل و الإقتران الفيزيائ,Université de M'sila,
- 2022
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2022
Calcium Sulfoaluminate Cement Synthesis by Natural Materials
Industrial-scale cement production has a negative impact on the environment due to the release of CO2. The cement industry continues to search for less environmentally harmful such as Calcium Sulfoaluminate cements are an alternative to Portland cement. The aim of this work is the preparation and characterizations of Calcium Sulfoaluminate cement from natural materials. On the other hand, different experimental techniques, including density, porosity, shrinkage, Vickers hardness, XRD and DSC were used to analyse the transformation of various phases at different temperatures. Keywords: Calcium Sulfoaluminate cement, Portland cement, Natural materials, Characterisations.
Citation
ZEYNEB Hammou , Hocine BELHOUCHET , DJELEL Kherifi , ,(2022), Calcium Sulfoaluminate Cement Synthesis by Natural Materials,The first national Seminar on Green Chemistry and Natural Products (GCNP’22),University of Echahid Hamma Lakhdar, El-Oued
- 2022
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2022
Preparation and characterization of yeelimite from local materials
Due to the increase in demand for cement in recent decades, the research has tended to the eco-cements such as Yeelimite, which is distinguished from other cements by its low carbon emissions. Calcium sulfoaluminate (CSA) cement or yeelimite belongs to the family of cements that have certain advantages over Portland cement (PC): low sintering temperature, reduced CO2 emissions, fast hardening and low shrinkage. The main components of CSA cement are yeelimite (C4A3S in cement notation where C=CaO, A=Al2O3, S=SO3). CSA cement has been used in many applications, such as bridge decks, pipes, concrete, etc. The objective of this work is the preparation and characterization of Yeelimite-based materials from local materials (natural phosphate from Djebel el-Onk), then the study of the physico-chemical and mechanical properties of the prepared materials. On the other hand, different experimental techniques, including density, porosity, shrinkage, Vickers hardness, XRD were used to analyse the formation and transformation of various phases at different temperatures. Through these results, we lighted the possibility of preparing the yeelimite from local materials (natural phosphate). Key-words: Yeelimite, Portland cement, Natural phosphate, Low CO2 emissions.
Citation
ZEYNEB Hammou , Hocine BELHOUCHET , ,(2022), Preparation and characterization of yeelimite from local materials,The first International Seminar on Materials Synthesis and Environmental Monitoring,university of kasdi merbah ouargla
- 2022
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2022
THE EFFECT OF ADDITION SPHALERITE (ZnS) ON YEELIMITE PREPARATION
Calcium sulfoaluminate, also called Yeelimite cement, is attracting a lot of interest due to its inherently low emissions during production and its very high mechanical properties compared to Portland cement. The objective of this work is to use local natural materials obtained from Algeria to produce Yeelimite-based cement with good physical and mechanical properties. On the other hand, we have developed many compounds based on natural phosphates, bauxite and gypsum and have produced many mixtures with different sphalorite contents. Various experimental techniques including: density, porosity, XRD, vickers hardness HV and FTIR were used to analyze the physical and mechanical properties. KEYWORDS: Calcium sulfoaluminate, Yeelimite, Portland cement, Low emissions.
Citation
ZEYNEB Hammou , Hocine BELHOUCHET , DJELEL Kherifi , ,(2022), THE EFFECT OF ADDITION SPHALERITE (ZnS) ON YEELIMITE PREPARATION,1 ST NATIONAL CONFERENCE ON MATERIALS, ENERGY& ENVIRONEMENTAL November 9 TH and 10 TH, 2022.,University of Biskra
- 2022
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2022
The Influence of Addition Sand (SiO2) On Yeelimite-Based Cement Prepared by Natural Materials
In recent years, reducing greenhouse gas emissions and saving energy have become a priority for global environmental protection. Calcium sulfoaluminate (C4A3S), also called Yeelimite cements, have been promoted as an alternative binder to Portland cement due to their much lower CO2 emissions. The aim of this work is the production of Yeelimite-based cement from local natural materials (natural phosphate from Djebel el-Onk). On the other hand, we have developed many compounds based on natural phosphate, bauxite and gypsum and have produced two mixtures with and without sand. Different experimental techniques: XRD, TG-DSC and MEB were used to analyze the formation of different phases at different temperatures. Through these results, we have demonstrated the possibility of making the Yeelimite from natural materials. Keywords: Calcium sulfoaluminate; Yeelimite; Portland cement; Natural phosphate.
Citation
ZEYNEB Hammou , Hocine BELHOUCHET , DJELEL Kherifi , ,(2022), The Influence of Addition Sand (SiO2) On Yeelimite-Based Cement Prepared by Natural Materials,Materials Sciences And Technology, (MatScience-2022),University of khenchela
- 2021
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2021
Sintering behaviour of fluorapatite–silicate composites produced from natural fluorapatite and quartz
In this work, the sintering behaviour of fluorapatite (FAp)–silicate composites prepared by mixing variable amounts of natural quartz (2.5 wt% to 20 wt%) and FAp was studied. The composites were pressureless sintered in air at temperatures from 1000 °C to 1350 °C. The effects of temperatures on the densification, phase formation, chemical bonding and Vickers hardness of the composites were evaluated. All the samples exhibited mixed phase, comprising FAp and francolite as the major constituents along with some minor phases of cristobalite, wollastonite, dicalcium silicate and/or whitlockite dependent on the quartz content and sintering temperature. The composite containing 2.5 wt% quartz exhibited the best sintering properties. The highest bulk density of 3 g/cm3 and a Vickers hardness of >4.2 GPa were obtained for the 2.5 wt% quartz–FAp composite when sintered at 1100 °C. The addition of quartz was found to alter the microstructure of the composites, where it exhibited a rod-like morphology when sintered at 1000 °C and a regular rounded grain structure when sintered at 1350 °C. A wetted grain surface was observed for composites containing high quartz content and was believed to be associated with a transient liquid phase sintering.
Citation
Hocine BELHOUCHET , , (2021), Sintering behaviour of fluorapatite–silicate composites produced from natural fluorapatite and quartz, Ceramics International, Vol:47, Issue:12, pages:16483-16490, Elsevier
- 2021
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2021
Sintering behavior of fluorapatite-based composites produced from natural phosphate and alumina
In this investigation, we studied the reaction-sintering between fluorapatite and alumina using natural phosphate and boehmite. The addition of alumina, resulting from the boehmite transitions, to the fluorapatite (FAp) has been carried out to obtain various composites based on FAp, yeelemite, mayenite, grossite (CA2), hibonite (CA6) and β-TCP. Several samples were prepared by varying the boehmite (AlOOH) amount to obtain six compositions which contain after sintering: 5, 10, 15, 20, 25 and 30 wt% of Al2O3. After ball-milling for 5 h, all compositions were sintered in the air for 2 h at different temperatures ranging from 1000 to 1500 °C. The reactions and phase transformations between fluorapatite and boehmite were studied and characterized by DTA/TG, XRD, FT-IR, apparent density and open porosity measurements, micro-hardness and SEM analysis. The micro-hardness and densification of the sintered body showed a marked improvement by increasing the alumina content and sintering temperature. Especially, sample containing 25% alumina exhibited the highest densification at 1400 °C (2.95 g/cm3) and excellent micro-hardness of about 6.5 ± 0.25 GPa. So the preparation of low cost composites based on fluorapatite, yeelimite and grossite from natural phosphate and alumina are feasible.
Citation
Hocine BELHOUCHET , S.Djouallah, A.Kenzour, D.Kherifi, , (2021), Sintering behavior of fluorapatite-based composites produced from natural phosphate and alumina, Ceramics International, Vol:47, Issue:3, pages:3553-3564, Elsevier
- 2021
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2021
Sintering behaviour of fluorapatite–silicate composites produced from natural fluorapatite and quartz
In this work, the sintering behaviour of fluorapatite (FAp)–silicate composites prepared by mixing variable amounts of natural quartz (2.5 wt% to 20 wt%) and FAp was studied. The composites were pressureless sintered in air at temperatures from 1000 °C to 1350 °C. The effects of temperatures on the densification, phase formation, chemical bonding and Vickers hardness of the composites were evaluated. All the samples exhibited mixed phase, comprising FAp and francolite as the major constituents along with some minor phases of cristobalite, wollastonite, dicalcium silicate and/or whitlockite dependent on the quartz content and sintering temperature. The composite containing 2.5 wt% quartz exhibited the best sintering properties. The highest bulk density of 3 g/cm3 and a Vickers hardness of >4.2 GPa were obtained for the 2.5 wt% quartz–FAp composite when sintered at 1100 °C. The addition of quartz was found to alter the microstructure of the composites, where it exhibited a rod-like morphology when sintered at 1000 °C and a regular rounded grain structure when sintered at 1350 °C. A wetted grain surface was observed for composites containing high quartz content and was believed to be associated with a transient liquid phase sintering.
Citation
DJELEL Kherifi , Hocine BELHOUCHET , ADMIN Admin , RAMESH SINGH (ramesh79@um.edu.my), K.Y. Sara Lee, Abdelghani Kenzour, Samira Djoualah, M.K.G. Abbas, Y.H. Wong, , (2021), Sintering behaviour of fluorapatite–silicate composites produced from natural fluorapatite and quartz, Ceramics International, Vol:47, Issue:12, pages:16483-16490, Elsevier
- 2021
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2021
Sintering behavior of fluorapatite-based composites produced from natural phosphate and alumina
In this investigation, we studied the reaction-sintering between fluorapatite and alumina using natural phosphate and boehmite. The addition of alumina, resulting from the boehmite transitions, to the fluorapatite (FAp) has been carried out to obtain various composites based on FAp, yeelemite, mayenite, grossite (CA2), hibonite (CA6) and β-TCP. Several samples were prepared by varying the boehmite (AlOOH) amount to obtain six compositions which contain after sintering: 5, 10, 15, 20, 25 and 30 wt% of Al2O3. After ball-milling for 5 h, all compositions were sintered in the air for 2 h at different temperatures ranging from 1000 to 1500 °C. The reactions and phase transformations between fluorapatite and boehmite were studied and characterized by DTA/TG, XRD, FT-IR, apparent density and open porosity measurements, micro-hardness and SEM analysis. The micro-hardness and densification of the sintered body showed a marked improvement by increasing the alumina content and sintering temperature. Especially, sample containing 25% alumina exhibited the highest densification at 1400 °C (2.95 g/cm3) and excellent micro-hardness of about 6.5 ± 0.25 GPa. So the preparation of low cost composites based on fluorapatite, yeelimite and grossite from natural phosphate and alumina are feasible.
Citation
Hocine BELHOUCHET , DJELEL Kherifi , Samira Djouallah, Abdelghani Kenzour, , (2021), Sintering behavior of fluorapatite-based composites produced from natural phosphate and alumina, Ceramics International, Vol:47, Issue:3, pages:3553-3564, Elsevier
- 2019
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2019
In situ high-temperature X-ray diffraction, FT-IR and thermal analysis studies of the reaction between natural hydroxyapatite and aluminum powder
The present work focuses on the study of the effects of mechanical activation on the reaction between hydroxyapatite (HAp) and aluminum metal powder using Algerian phosphate (natural HAp) as a starting raw material. Aluminum metal powder was used to obtain reinforced (HAp) composites materials with alumina. The alumina phases result from the oxidation of aluminum powder at high temperature. The reactions and phase transformations between HAp and aluminum powder were studied using thermal techniques (DTA/TG), X-ray diffraction (in situ HTXRD and standard), infrared spectroscopy (FT-IR) and SEM analysis. After mechanical treatment for different milling time, no new phases were formed from HAp and Al after 40 h of milling at room temperature. However, all mixture powders were milled for different time showing the formation of several alumina transitions during heat treatment. The oxidation of Al powder, the formation of alumina transitions (v and j-Al2O3), a-alumina, HAp crystallization and tricalcium phosphate (b-TCP and a-TCP) formation were affected by ball milling time. After 40 h of ball milling, the aluminum was not detected at 673 K, which confirms the solid-state oxidation of aluminum at low temperatures. The results showed the formation of high amount of a-TCP at 1173 K in the samples milled for 40 h.
Citation
Hocine BELHOUCHET , Afaf Mokhtari, A Guermat, , (2019), In situ high-temperature X-ray diffraction, FT-IR and thermal analysis studies of the reaction between natural hydroxyapatite and aluminum powder, Journal of Thermal Analysis and Calorimetry, Vol:136, Issue:, pages:1515–1526, SpringerLink
- 2019
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2019
Improvement of mechanical and dielectric properties of porcelain insulators using economic raw materials
tThe present study is aimed to develop porcelain from locally available raw materials. Thisporcelain was prepared from the mixture of kaolin, quartz, feldspar, and recycled wasteglass. In this work, the expensive K-feldspar was substituted by recycled waste glass derivedfrom broken car glass. The effects of recycled waste glass in partial replacement of K-feldsparfor porcelain are discussed. Experimental results showed significant effects of recycledwaste glass substitution and sintering temperature on physical properties. Furthermore,the microstructure observation indicated that the replacement of K-feldspar by the recy-cled waste glass indicates the reducing firing temperature 200◦C was achieved by 30 wt%glass addition. Moreover, experimental investigations showed excellent mechanical (micro-hardness) and insulating properties (dielectric strength) of the prepared porcelain whencompared to that of traditional porcelain insulators. The Vickers micro-hardness found anincrease with both glass addition and sintering temperature. Dielectric constant (ε), dielec-tric loss tangent (tan ı) and loss factor (ε) were measured at different frequencies. Theresults reveal that glass addition enhances the dielectric properties of the samples fired at1100◦C. Finally, the best results of phase angle were obtained ∼(−89.2◦) for this porcelain.These results prove that our prepared insulator is a dielectric capacitor.
Citation
Khaled BELHOUCHET , Hocine BELHOUCHET , A bayadi, Maximina Romero, , (2019), Improvement of mechanical and dielectric properties of porcelain insulators using economic raw materials, Boletin de la Sociedad Espanola de Ceramica y Vidrio, Vol:57, Issue:, pages:28-37, Elsevier
- 2019
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2019
Phase transformation and sintering behavior of flurapatite-alumina composite materials
Hydroxyapatite (HAp) presents a very important bioceramics and has been widely applied as bone substitutes because of its excellent bioactive properties. But has poor mechanical properties such as: toughness and flexural strength; therefore, it is usually reinforced with particles, fibres or whiskers to improve its properties. Among particles added to Hydroxyapatite are alumina particles which improve its mechanical properties. The aim of the present work is to explore the utilization of Algerian Hydroxyapatite and boehmoite (AlOOH) to synthesise Hydroxyapatite/alumina composites through reaction sintering and investigate phase transformation and sintering behaviour of the composites. The sintering behaviour was investigated using X-ray diffraction and electron microscopy. Several calcium aluminate phases were produced by the solid-state reaction between Hydroxyapatite and Al2O3. The mixture of hydroxyapatite and boehmite shows the partial decomposition of hydroxyapatite at high temperature. The increase in alumina ratio (20%wt) promoted the enhancement of mechanical properties of Hydroxyapatite.
Citation
Hocine BELHOUCHET , DJELEL Kherifi , Samira DJOUALLAH, Andelghani Kenzour, ,(2019), Phase transformation and sintering behavior of flurapatite-alumina composite materials,Third International conference of mechanics and materials ICMM 2019,Setif, Algeria
- 2019
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2019
The reaction between alumina and algerian natural phosphate
In this work, several composite materials were prepared using natural phosphate (Fluoroapatite) and Alumina. The mixtures were milled by attrition milling for 1h and then pressed in cylindrical form. Finally, the simples’ compacts were sintered between 1000 and 1600°C for 2 h. Reactions and phase transformations of the powder sintering were studied by X-ray diffraction, density, open porosity, Vickers hardness and SEM analysis. From the X-ray patterns, we put in evidence the formation of some composites such as: fluoroapatite-alumina in the low temperature and α-TCP-hibonite in the high temperature. The open porosity is decreased while the bulk density increases relatively with the increase of the sintering temperature. The correlation between morphological and mechanical properties is confirmed by Vickers hardness values, SEM imaging, and qualitative analysis using XRD.
Citation
DJELEL Kherifi , Hocine BELHOUCHET , Samira Djouallah, Andelghani Kenzour, ,(2019), The reaction between alumina and algerian natural phosphate,Third International conference of mechanics and materials ICMM 2019,Setif, Algeria
- 2019
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2019
The effect of aluminum powder addition on the sintering of hydroxyapatite
In this paper, we prepared by reaction sintering a hydroxyapatite /yeelimite composite from the natural phosphate of Djebel el’onk and the aluminum metal powder. The effect of aluminum addition on the sintering of natural hydroxyapatite was investigated. Hydroxyapatite (HAp) bioceramic materials have been widely applied as bone substitutes because of its excellent compatibility with the human body. The additions of aluminum to the hydroxyapatite have been carried out to improve properties of sintered HAp. By mechanical treatment, hap properties were studied according to the different milling time and the composite ceramics were sintered in air at various temperatures ranging from 1200 to 1450°C. The reactions and phase transformations between natural hydroxyapatite and aluminum metal powder were studied by various experimental techniques such as XRD and SEM. The results of the mixture of hydroxyapatite and aluminum powder showed the formation of deferent phases after high time of milling at high temperature. The addition of aluminum results the partial decomposition of hydroxyapatite at high temperature.
Citation
Hocine BELHOUCHET , Afaf Mokhtari, ,(2019), The effect of aluminum powder addition on the sintering of hydroxyapatite,Third International conference of mechanics and materials ICMM 2019,Setif, Algeria
- 2019
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2019
The effect of additions (kaolin DD3 + alumina) on the sintering of natural fluoroapatite.
In this work, several composite materials were prepared using natural phosphate (Fluoroapatite), kaolin and Alumina. Reactions and phase transformations of the powder sintering were studied by X-ray diffraction, density, open porosity, shrinkage, hardness and SEM analysis. From the X-ray patterns, we put in evidence the formation of some composites such as: Fluoroapatite-Yeelmite in the low concentrations and Fluoroapatite-anorthite in the high concentrations. The open porosity is decreased while the bulk density increases relatively with the increase of the sintering temperature. The correlation between morphological and mechanical properties is confirmed by Vickers hardness values, SEM imaging, and qualitative analysis using XRD.
Citation
DJELEL Kherifi , Hocine BELHOUCHET , Andelghani Kenzour, ,(2019), The effect of additions (kaolin DD3 + alumina) on the sintering of natural fluoroapatite.,4th INTERNATIONAL SYMPOSIUM ON MATERIALS AND SUSTAINABLE DEVELOPMENT (ISMSD2019),Boumerdes, Algeria
- 2019
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2019
Elaboration and characterization of porous hydroxyapatite materials via the reaction-sintering of phosphate and aluminium powder
In this work, the effects of mechanical activation on the reaction-sintering of hydroxyapatite/aluminum powder were investigated. The low mechanical properties of the hydroxyapatite have been the main problem of the extensive use of this material. The addition of alumina, resulting from the oxidation of aluminum, to the hydroxyapatite has been carried out to improve his mechanical properties. All samples were heated at different temperatures (1200-1450°C) for 2 h and characterized by apparent density, open porosity measurements, XRD and SEM analysis.
Citation
Hocine BELHOUCHET , ,(2019), Elaboration and characterization of porous hydroxyapatite materials via the reaction-sintering of phosphate and aluminium powder,Apmas 2019,Oludeniz, TURKEY
- 2019
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2019
Influence of heating rate and mechanical activation on the reaction between kaolin and aluminium powder
In this work, the effect of heating rate and mechanical activation on the reaction of kaolin and aluminium powder was investigated. A batch comprised of 89.5 wt%kaolin and 10.5 wt%aluminiumpowders was mixed and milled in a planetary ball-mill for 1, 5, 10, 20 and 40 h. The mixture powders were heat treated with a heating rate of 5, 10, 15, 20, 30 and 40 °C/min, respectively. After milling for 20 and 40 h, the results showed the formation of free silicon, quartz and nacrite (Al2Si2(OH)4) at room temperature. The kaolinite dehydroxylation, aluminium oxidation and the θ- to α-Al2O3 transformations are highly affected by heating rate and mechanical activation. As comparedwith the smallest heating rate, the mixtures heated with faster heating rate show the disappearance of the peak corresponding to the oxidation of aluminium and the appearance of a second peak corresponding to the formation of α-Al2O3. The intensity of the last peak increases with increasing of the heating rate and milled at lower milling time. The effects of heating rate in the reaction of kaolin and aluminium powder are attributed to the amorphization of kaolinite, the diffusion of Al3+ to form an amorphous alumina layer on the particle surface and the generation of microcracks at the particle surface of aluminium powder.
Citation
Hocine BELHOUCHET , Khaled BELHOUCHET , Toufik Sahraoui, Maximina Romero, , (2019), Influence of heating rate and mechanical activation on the reaction between kaolin and aluminium powder, Journal of the Australian Ceramic Society, Vol:55, Issue:, pages:135–144, SpringerLink
- 2019
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2019
The non-isothermal kinetics of hydroxyapatite formation in kaolin - natural phosphate mixtures
In this work, the activation energy of hydroxyapatite formation in different composites under non-isothermal conditions was determined using differential thermal analysis (DTA). Seven compositions were prepared and studied while varying the percentage of the kaolin from 20 to 80 wt.% at 10% increments. The DTA conducted at heating rates of 10, 20 and 30 K min−1 showed an exothermic peak in all composites in the region 700°C–750°C associated with hydroxyapatite formation. The activation energies measured from non-isothermal treatments for seven compositions (20, 30, 40, 50, 60, 70 and 80 mass% of kaolin) were 194, 178, 178, 209, 162, 146 and 121 kJ mol−1, respectively.
Citation
Hocine BELHOUCHET , Fateh Chouia, Toufik Sahraoui, , (2019), The non-isothermal kinetics of hydroxyapatite formation in kaolin - natural phosphate mixtures, World Journal of Environmental Research, Vol:9, Issue:, pages:1-7, /
- 2019
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2019
Sintering behavior of anorthite-based composite ceramics produced from natural phosphate and kaolin
In the present work anorthite-TCP composite ceramics was produced for the first time by the solid-state sintering process involving the mixture of local natural materials of phosphate and kaolin. Various samples were prepared by varying the kaolin content from 47 to 57 wt%. The composite ceramics were sintered in air at various temperatures ranging from 1250 °C to 1325 °C and characterized to determine the phase present, relative density, Vickers microhardness, chemical bonding of molecules and microstructural development. In general, all the samples exhibited a hybrid structure, comprising of anorthite and β-TCP as the major phases with a concomitant minor phases such as TTCP and/or gehlinite depending on the temperature and kaolin content. In addition, increasing kaolin content and sintering temperature were found to be effective in improving the densification and hardness of the sintered body. In particular, sample containing 57 wt% kaolin exhibited excellent densification at 1300 °C and 1325 °C, achieving above 97% dense bodies and highest hardness of about 6.5 ± 0.7 GPa. Microstructural investigation revealed that a dense structure was evident for these samples due mainly to enhanced particle coalescence during the liquid phase sintering, resulting in pore elimination and grain coarsening.
Citation
Hocine BELHOUCHET , , (2019), Sintering behavior of anorthite-based composite ceramics produced from natural phosphate and kaolin, Ceramics International, Vol:45, Issue:16, pages:20258-20265, sciencedirect
- 2019
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2019
Elaboration and characterization of porous hydroxyapatite materials via the reaction-sintering of phosphate and aluminium powder
In order to fabricate cheaper porous hydroxyapatite/krotite composites, we worked on the opportunity to use Algerian phosphate and aluminum metal powder. Hydroxyapatite (Hap) is a bioceramics due to its similar composition to bone substitutes because of its excellent bioactive properties. However, the low mechanical properties of this material have been the major problem of the extensive use of this bioceramics. Aluminum metal powder was used to obtain reinforced hydroxyapatite composites with krotite. The alumina phases resulting from the oxidation of aluminum powder at high temperature. The reactions and phase transformations between hydroxyapatite and aluminum powder were studied using thermal techniques (DTA/TG), X-ray diffraction (standard and In-situ XRD) and infrared spectroscopy (FT-IR). All samples were heated at different temperatures and characterized by apparent density, open porosity measurements, XRD and SEM analysis. The results showed the formation of different phases at room temperature. The mixture powder milled showed the formation of different phases during heat treatment. Porosity was shown to be increased with temperature increasing and controlled by the reaction between phosphate and aluminum metal powder.
Citation
Hocine BELHOUCHET , ,(2019), Elaboration and characterization of porous hydroxyapatite materials via the reaction-sintering of phosphate and aluminium powder,9th International advances in applied physics & materials science,Turkey
- 2018-07-20
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2018-07-20
Heat treatment and kinetics of precipitation of β-Mg17Al12 phase in AZ91 alloy
This study investigated the effect of aging on the precipitation and kinetics of second-phase Mg17Al12 in AZ91 magnesium alloy (Mg-9 wt% Al-1 wt% Zn), using X-ray diffraction, microhardness measurements, and differential scanning calorimetric analysis (DSC). With the last instrument, the all samples were heated from room temperature to 400 °C, at heating rates of 10–30 °C/min. The results were supplemented by measuring the average of activation energies, using isothermal treatments by Johnson–Mehl–Avrami (JMA) methods and by non-isothermal treatments using Ozawa, Boswell, Kissinger, Mahadevan, Augis and Bennett methods, were around 67.18 and 62.02 kJ/mol. The frequency factor k0 calculated by the isothermal treatment is equal to 1.24 109 s−1. In non-isothermal treatment, the numerical factor m and the Avrami parameter n is estimated to be approximately equal to 3 and 2.79 respectively. This value corresponding that the bulk nucleation with a constant number of nuclei was dominant in three-dimensional (polyhedron) controlled by interface reaction
Citation
AMAR Djemli , Ameur Ouali , MohamedAmine GHEBOULI , Hocine BELHOUCHET , Fatmi messaoud, Tayab Chihi, , (2018-07-20), Heat treatment and kinetics of precipitation of β-Mg17Al12 phase in AZ91 alloy, Results in Physics, Vol:10, Issue:2018, pages:693-698, Elsevier
- 2018
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2018
Mullite fabrication from natural kaolin and aluminium slag
The structural transformations of kaolin–aluminium slag mixtures during heating werestudied using differential thermal analysis (DTA), thermal gravimetric analysis (TGA),Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction analysis (XRD) and scanningelectron microscopy (SEM). The amount of formed mullite increases with the firing temper-ature. At 1500◦C, the mullitization of the mixture is almost complete. The morphology ofthe formed mullite is bimodal (primary and secondary phases). The primary mullite, formedfrom processing of kaolin by the gradual collapse of metakaolin from 990◦C, has a shape ofelongated crystals. The other hand, the secondary mullite formed by solution-precipitationfrom the glass phase in the presence of alumina particles has a shape of acicular grains.
Citation
Hocine BELHOUCHET , , (2018), Mullite fabrication from natural kaolin and aluminium slag, Boletin de la Sociedad Espanola de Ceramica y Vidrio, Vol:57, Issue:, pages:169-177, Elsevier
- 2018
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2018
Heat treatment and kinetics of precipitation of β-Mg17Al12phase in AZ91 alloy
The kinetics of discontinuous precipitation of Ag2Al intermetallic in alloy Al – 10 % Ag is studied after 10-h holding in vacuum at 530 °C and subsequent water quenching. The DSC and dilatometric curves are plotted for heating rates ranging from 5 to 20 °Cmin. The activation energy of formation of the Ag2Al -phase is computed from the DSC data with the help of the Boswell equation by the Kissinger method.
Citation
Hocine BELHOUCHET , M. Fatmi, F. Sahnoune, M. Heraiz, N. Saheb, , (2018), Heat treatment and kinetics of precipitation of β-Mg17Al12phase in AZ91 alloy, Results in Physics, Vol:10, Issue:, pages:693-698, /
- 2018
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2018
The effects of B2O3 addition on the properties of anorthite prepared from Algerian kaolin
The aim of the present work is to explore the utilization of Algerian kaolin (DD2) and calcium carbonate (CaCO3) to synthesis of anorthite. Also, the effect of B2O3 addition on the properties of prepared anorthite was investigated. Compacted samples were sintered at temperatures between 1100 and 1300 C for 2 h. All samples were characterized by X-ray diffraction, differential thermal analysis/thermogravimetric analysis, apparent density and open porosity measurements. The experimental results show the formation of anorthite in all samples. The increase in B2O3 ratio promoted the formation and the densification of anorthite at lower temperature.
Citation
Hocine BELHOUCHET , A. Mokhtari, F. Sahnoune, , (2018), The effects of B2O3 addition on the properties of anorthite prepared from Algerian kaolin, Acta Physica Polonica A, Vol:134, Issue:, pages:460-462, /
- 2018
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2018
Dilatometric and DSC Study of the Kinetics of Discontinuous Precipitation of Ag2Al Intermetallic in Al – 10% Ag Alloy
The kinetics of discontinuous precipitation of Ag2Al intermetallic in alloy Al – 10% Ag is studied after 10-h holding in vacuum at 530°C and subsequent water quenching. The DSC and dilatometric curves are plotted for heating rates ranging from 5 to 20 Kmin. The activation energy of formation of the Ag2Al -phase is computed from the DSC data with the help of the Boswell equation and by the Kissinger method.
Citation
Hocine BELHOUCHET , M.Fatmi, F. Sahnoune, M. Heraiz, N. Saheb, , (2018), Dilatometric and DSC Study of the Kinetics of Discontinuous Precipitation of Ag2Al Intermetallic in Al – 10% Ag Alloy, Metal Science and Heat Treatment, Vol:60, Issue:, pages:185–189, /
- 2018
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2018
Thermal Shock Resistance of Mullite obtained from Kaolin and Tri-hydrated Alumina
In this work we have studied the thermal shock behavior of mullite prepared locally under different conditions. The initial powders used are 60% of trihydrate alumina (Gibbsite) and 40% of natural Kaolin. The specimen shaping was obtained by uniaxial pressing the mixture powders under three pressures (100, 80 and 70) MPa. After debinding at 600°C, precooked samples were sintered at 1600°C for 1h. Differential thermal analysis coupled with thermogravimetric analysis, conducted on the mixture kaolin-gibbsite, revealed different microstructural transformations and reactions occurring during heating. The spectra X-ray diffraction showed the presence of mullite. Observations of the microstructures showed a bi-modal morphology of the mullite grains. A water-quenching technique was used for the thermal shock tests. The Mullite specimens were heated at different temperatures (100°C to 500°C), and held at each temperature for 10 min. Then, the heated specimens were dropped by free fall into a water bath, which was maintained at 25°C with a thermostat. The residual strengths of the quenched specimens were determined in a three-point bending test. The results showed that the quenching critical temperature difference ΔTc depends on density and porosity of the samples.
Citation
Hocine BELHOUCHET , Zahra Malou, Mohamed Hamidouche, , (2018), Thermal Shock Resistance of Mullite obtained from Kaolin and Tri-hydrated Alumina, High Temperatures-High Pressures, Vol:47, Issue:2, pages:179-190, /
- 2017
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2017
Elaboration and Characterization of Bioceramics from Natural Phosphate
The aim of this work is the substitution of the bovine bone by the natural phosphate from Djebelel-Onk (Tébessa, East of Algeria). We prepared two composites (bone/Al2O3 and natural phosphate/Al2O3) by reaction sintering. Different experimental techniques, including density, porosity, X-rays diffraction, and SEM techniques, were used to analyze the formation and transformation of phases at different temperatures. From the X-ray diffraction patterns, we put in evidence the formation of several phases. Through these results, we lighted the possibility of preparing bioceramics from natural phosphate (bone and natural phosphate). The presence of the different materials was confirmed by the micrographic observations. DOI: 10.12693/APhysPolA.131.117 PACS/topics: 81.05.Je, 81.05.Mh, 87.85.jf
Citation
Hocine BELHOUCHET , Foudil SAHNOUNE , MENAD Heraiz , , (2017), Elaboration and Characterization of Bioceramics from Natural Phosphate, ACTA PHYSICA POLONICA A, Vol:131, Issue:1, pages:117-119, POLISH ACAD SCIENCES INST PHYSICS
- 2017
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2017
Thermal Decomposition Kinetics of Algerian Tamazarte Kaolin by Differential Thermal Analysis (DTA)
investigated by using differential thermal analysis. The differential thermal analysis and the thermogravimetric experiments were carried out on samples between room temperature and 1400 °C, at heating rates from 10 to 40 °Cmin-1. X-ray diffraction was used to identify the phases present in the samples. The activation energies measured by differential thermal analysis from isothermal and non-isothermal treatments using Johnson-Mehl- Avrami methods with Ligero approximation and using Kissinger-Akahira-Sunose methods were around 145 and 159 kJ/mol, respectively. The Avrami parameter n which indicates the growth morphology parameters were found to be almost equal to 1.60, using non-isothermal treatments, and equal to 1.47 using isothermal treatments. The numerical factor which depends on the dimensionality of crystal growth was 1.60 obtained using Matusita et al. equation. The frequency factor calculated using the isothermal treatment is equal to 1.173 * 107 s-1. Analysis of the results have shown that bulk nucleation was dominant during kaolinite transformation, followed by three-dimensional growth of meta-kaolinite with polyhedron-like morphology, controlled by diffusion from a constant number of nuclei. DOI: 10.12693/APhysPolA.131.382 PACS/topics: 82.30.Lp, 81.05.Je, 81.05.Mh, 81.70.Pg
Citation
Foudil SAHNOUNE , MENAD Heraiz , Hocine BELHOUCHET , Nouari Saheb, Djida Redaoui,, , (2017), Thermal Decomposition Kinetics of Algerian Tamazarte Kaolin by Differential Thermal Analysis (DTA), ACTA PHYSICA POLONICA A, Vol:131, Issue:3, pages:382-385, POLISH ACAD SCIENCES INST PHYSICS
- 2015
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2015
Effect of soda- lime- silica waste glass on the properties and microstructures development in porcelain insulator
the effect of soda lime silica waste glass, from the glass ca broken in partial replacement of k-feldespar for porcelain insulators are disscussed. in this study, different mixes of four different materials namely; Kaolin from Tamazert, quartz from Tamerasset feldespar from Spain and recycle soda-lime-silica were prepared by sintering the samples between 1000 and 1300°C for 2 h. Mesearments have been performed by X-ray diffraction, scanning electron microscopy, DTA/TG, water absorption, and mechanical tests. Experimental results showed a significant improvement in physical and michanical properties. the microstructure observasion indicated that replacement of K- feldespar by the soda-lime-silica waste can facilate the sintering of the porcelain insulators. Finally, the addition of the soda-lime-silica improves the dielectric properties.
Citation
Khaled BELHOUCHET , Hocine BELHOUCHET , ,(2015), Effect of soda- lime- silica waste glass on the properties and microstructures development in porcelain insulator,Conference materiaux 2015,Mahdia, Tunisia
- 2014
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2014
Elaboration and characterization of multiphase composites obtained by reaction sintering of boehmite and zircon
In this work, different composites (zircon–mullite–zirconia, mullite–zircon–zirconia, mullite–zirconia, mullite– zirconia–alumina and alumina–mullite–zirconia) were developed by reaction sintering of boehmite (AlOOH) and zircon (ZrSiO4). Several mixtures were used by varying the boehmite content from 10 to 90 wt. %. All powders were mixed and grounded by ball milling and then pressed in cylindrical form. Finally, the green specimens were sintered under normal conditions for 2 hours at temperatures between 1400 and 1600°C, with a heating rate of 5°C/min. The dilatometric curves reveal several microstructural transformations in these mixtures. The X-rays diffraction spectra revealed factors such as percentage of boehmite and zircon and the sintering temperature lead to the formation of several composites. The presence of the various phases was confirmed by micrographic observations.
Citation
Hocine BELHOUCHET , Hocine MAKRI , , (2014), Elaboration and characterization of multiphase composites obtained by reaction sintering of boehmite and zircon, Journal of the Australian Ceramic Society, Vol:50, Issue:2, pages:135 – 146, Australian Ceramic Society