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Auteur Smail Hamamda |
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Titre : Analyse thermique des alliages d'aluminium AlMgSi(Cu) Type de document : texte imprimé Auteurs : Khadidja Boulemzaoud, Auteur ; Smail Hamamda, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2012 Importance : 102 f. Format : 31 cm. Note générale : Magister
2 copies imprimées disponiblesLangues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Alliages Al-Mg-Si DSC dilatometrie excès de Silicim coefficient de dilatation thermique Index. décimale : 530 Physique Diplôme : Magistère En ligne : ../theses/physique/BOU6169.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=6110 Analyse thermique des alliages d'aluminium AlMgSi(Cu) [texte imprimé] / Khadidja Boulemzaoud, Auteur ; Smail Hamamda, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2012 . - 102 f. ; 31 cm.
Magister
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Alliages Al-Mg-Si DSC dilatometrie excès de Silicim coefficient de dilatation thermique Index. décimale : 530 Physique Diplôme : Magistère En ligne : ../theses/physique/BOU6169.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=6110 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/6169 BOU/6169 Thèse Bibliothèque principale Thèses Disponible
Titre : Dilatométrie des matériaux réfractaires Type de document : texte imprimé Auteurs : Imediddene Zerrouk, Auteur ; Smail Hamamda, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 20111 Importance : 97 f. Format : 31 cm Note générale : Doctorat en sciences
2 copies imprimées disponiblesLangues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : graphite pressé analyse thermique dilatation thermique anisotropie pressage. Physique Index. décimale : 530 Physique Diplôme : Doctorat en sciences En ligne : ../theses/physique/ZER5907.pdf Permalink : index.php?lvl=notice_display&id=5705 Dilatométrie des matériaux réfractaires [texte imprimé] / Imediddene Zerrouk, Auteur ; Smail Hamamda, Directeur de thèse . - Constantine : Université Mentouri Constantine, 20111 . - 97 f. ; 31 cm.
Doctorat en sciences
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : graphite pressé analyse thermique dilatation thermique anisotropie pressage. Physique Index. décimale : 530 Physique Diplôme : Doctorat en sciences En ligne : ../theses/physique/ZER5907.pdf Permalink : index.php?lvl=notice_display&id=5705 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ZER/5907 ZER/5907 Thèse Bibliothèque principale Thèses Disponible Influence des additions nanométriques sur les propriétés thermodynamiques et structurales des matériaux. / Yassine Naoui
Titre : Influence des additions nanométriques sur les propriétés thermodynamiques et structurales des matériaux. Type de document : texte imprimé Auteurs : Yassine Naoui, Auteur ; Smail Hamamda, Directeur de thèse Mention d'édition : 21/01/2021 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2021 Importance : 186 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : physique: Sciences des matériaux Sciences des matériaux: Semi-conducteurs Cellulose MWCNT Ciment portland Fe-Cu DSC Dilatométrie TG DRX SERS Photoluminescence Portland cement Dilatometry السليلوز أنابيب الكربون النانوية الإسمنت البورتلاندي الحديد-نحاس المسعر التفاضلي قياس التمدد الحراري التغير في الوزن حراريا انعراج الأشعة السينية مطيافية رامان التلألؤ الضوئي Index. décimale : 530 Physique Résumé :
The objective of the work undertaken within the framework of this thesis is the study of the thermodynamic and structural characteristics of a class of nanocomposites. The characteristics of luminescent materials based on microcrystalline cellulose (MCC) containing oxides and rare earth elements were investigated. In order to highlight the role of multi-walled carbon nanotubes (MWCNT) in the improvement of physical properties of materials (portland cement, FeCu), several thermodynamic and structural techniques have been carried out. • For luminescent materials: Several series (A, B, C and D) of samples were studied. Several non-destructive testing methods have been used. The results obtained are a contribution to the development of cellulose/oxide composites studied as luminescent transformers of violet and blue light and of a new type of electroluminescent diodes of white light. • For Portland cement + plasticizer nanocomposites / MWCNT: Two samples underwent several characterizations to study the effect of the addition of multi walled carbon nanotubes (MWCNT) on the thermodynamic and structural properties of the samples produced. The DSCs of the two samples are similar. The two curves contain the same number of anomalies and they appear at the same temperatures. This can mean that only one mechanism is operational. The effect of MWCNT dispersion plays a significant role. TG has shown that MWCNTs well stabilize the matrix. The agglomeration of MWCNTs blocks the expansion of the matrix which can lead to contraction and occupation of different types of defects. The XRD showed a remarkable increase in the intensity of the peaks of the spectrum of the sample containing the MWCNTs. This may be related to the increase in the degree of crystallinity of the CH formed and/or to the increase in the rate of its formation. • For FeCu / MWCNT nanocomposites: Four FeCu-based nanocomposites containing different concentrations of MWCNT (0%, 0.25%, 0.75% and 1% MWCNT) were synthesized by high energy ball milling, then underwent characterizations using different techniques. XRD has shown that crystallite sizes vary from 26 to 84 nm and the stresses are negligible. The FeCu + 1% MWCNT sample has the best refinement. SERS characterization revealed that the 1% concentration of MWCNT is responsible for the homogeneous distribution of MWCNT. In addition, the ID/IG ratio decreased with the increasing of MWCNT concentration. A decrease in the expansion of the three nanomaterials was observed compared to conventional materials. The introduction of 1% MWCNT is the cause of the lower expansion. At low temperatures, the TG curves are line segments. As the temperature rises, TG increases slightly. At high temperatures, the effect of oxidation depends on the concentration of MWCNT. The FeCu/1% MWCNT nanomaterial has the lowest TG. The DSC results showed the same observation as that of the TG analysis.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/NAO7705.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11539 Influence des additions nanométriques sur les propriétés thermodynamiques et structurales des matériaux. [texte imprimé] / Yassine Naoui, Auteur ; Smail Hamamda, Directeur de thèse . - 21/01/2021 . - جامعة الإخوة منتوري قسنطينة, 2021 . - 186 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : physique: Sciences des matériaux Sciences des matériaux: Semi-conducteurs Cellulose MWCNT Ciment portland Fe-Cu DSC Dilatométrie TG DRX SERS Photoluminescence Portland cement Dilatometry السليلوز أنابيب الكربون النانوية الإسمنت البورتلاندي الحديد-نحاس المسعر التفاضلي قياس التمدد الحراري التغير في الوزن حراريا انعراج الأشعة السينية مطيافية رامان التلألؤ الضوئي Index. décimale : 530 Physique Résumé :
The objective of the work undertaken within the framework of this thesis is the study of the thermodynamic and structural characteristics of a class of nanocomposites. The characteristics of luminescent materials based on microcrystalline cellulose (MCC) containing oxides and rare earth elements were investigated. In order to highlight the role of multi-walled carbon nanotubes (MWCNT) in the improvement of physical properties of materials (portland cement, FeCu), several thermodynamic and structural techniques have been carried out. • For luminescent materials: Several series (A, B, C and D) of samples were studied. Several non-destructive testing methods have been used. The results obtained are a contribution to the development of cellulose/oxide composites studied as luminescent transformers of violet and blue light and of a new type of electroluminescent diodes of white light. • For Portland cement + plasticizer nanocomposites / MWCNT: Two samples underwent several characterizations to study the effect of the addition of multi walled carbon nanotubes (MWCNT) on the thermodynamic and structural properties of the samples produced. The DSCs of the two samples are similar. The two curves contain the same number of anomalies and they appear at the same temperatures. This can mean that only one mechanism is operational. The effect of MWCNT dispersion plays a significant role. TG has shown that MWCNTs well stabilize the matrix. The agglomeration of MWCNTs blocks the expansion of the matrix which can lead to contraction and occupation of different types of defects. The XRD showed a remarkable increase in the intensity of the peaks of the spectrum of the sample containing the MWCNTs. This may be related to the increase in the degree of crystallinity of the CH formed and/or to the increase in the rate of its formation. • For FeCu / MWCNT nanocomposites: Four FeCu-based nanocomposites containing different concentrations of MWCNT (0%, 0.25%, 0.75% and 1% MWCNT) were synthesized by high energy ball milling, then underwent characterizations using different techniques. XRD has shown that crystallite sizes vary from 26 to 84 nm and the stresses are negligible. The FeCu + 1% MWCNT sample has the best refinement. SERS characterization revealed that the 1% concentration of MWCNT is responsible for the homogeneous distribution of MWCNT. In addition, the ID/IG ratio decreased with the increasing of MWCNT concentration. A decrease in the expansion of the three nanomaterials was observed compared to conventional materials. The introduction of 1% MWCNT is the cause of the lower expansion. At low temperatures, the TG curves are line segments. As the temperature rises, TG increases slightly. At high temperatures, the effect of oxidation depends on the concentration of MWCNT. The FeCu/1% MWCNT nanomaterial has the lowest TG. The DSC results showed the same observation as that of the TG analysis.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/NAO7705.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11539 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité NAO/7705 NAO/7705 Thèse Bibliothèque principale Thèses Disponible
Titre : Influence des traitements thermiques sur les propriétés mécaniques des alliages d’Al sous forme des tôles et des rubans. Type de document : texte imprimé Auteurs : Soror Saadallah, Auteur ; Smail Hamamda, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 169 f. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Sciences des Matériaux:Métallurgie Alliages Al-Mg-Si Ruban Dilatométrie Coefficient de dilatation thermique Anisotropie Nanocomposites Alloys Al-Mg-Si Ribbon Dilatometry Coefficient of thermal expansion Anisotropy سبائك الألمنيوم-مغنيزيوم-سيليسيوم الشريط معامل التمدد الحراري التباين مركبات النانومترية Index. décimale : 530 Physique Résumé :
The work undertaken in this thesis is reserved for the study of aluminium alloys of different shapes. We are interested in the role of thickness on the different mechanical, spectroscopic, thermodynamic and structural properties. The materials that were the subject of this thesis are the four AlMgSi alloys in the form of sheets obtained by rapid cooling containing several addition elements and two nanocomposites Al + 0.1%NTCM and Al + 1%NTCM. Concerning the sheets, an analysis of the different thermomechanical treatments was carried out using several investigation techniques. For the study of the coefficient of thermal expansion as a function of temperature, it was necessary to take three samples from each sheet in the directions X parallel to the rolling direction; Y perpendicular to the rolling direction and Z perpendicular to the rolling plane. For the purpose of this work, the characterization techniques are differential scanning calorimetry (DSC), thermogravimetry, dilatometry, optical microscopy, X-ray diffraction, microhardness, X-ray diffraction, Raman spectroscopy and infrared spectroscopy. The results of the DSC and dilatometry confirm the precipitation sequences in AlMgSi alloys and show the presence of anomalies whose shapes and intensities vary with temperature. In general, the behaviour is similar to that of conventional aluminium alloys, whose precipitation sequences are well studied. The presence of anisotropy is demonstrated by dilatometry.
Microhardness increases as thickness decreases. The X-ray diffraction study revealed only the presence of the aluminum matrix. The results for the ribbons obtained by DRX showed the presence of alumina and aluminium carbide. Thermogravimetry of nanocomposite reveals a low weight loss compared to pure aluminum Raman spectroscopy revealed the presence of two bands: the D band at 1300cm-1 connected to the disorder while the G band at 1590cm-1 represents the vibration of the sp2 sites. Infrared spectroscopy shows the presence of six peaks: Peak at 3746cm-1 is bound to the hydroxyl group (O-H) ; peak at 2341cm-1 is bound to the hydrogen bond due to oxygen-containing groups (CH...O) ; peak at 2358 cm-1 is bound to CO2 ; peak at 1651 cm-1 is bound to carboxyl functions ; peak at 1047 cm-1 is bound to the C-O bond and peak at 668 cm-1 is bound to aluminum oxide ( Al2O3).Diplôme : Doctorat en sciences En ligne : ../theses/physique/SAA7442.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11220 Influence des traitements thermiques sur les propriétés mécaniques des alliages d’Al sous forme des tôles et des rubans. [texte imprimé] / Soror Saadallah, Auteur ; Smail Hamamda, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 169 f.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Sciences des Matériaux:Métallurgie Alliages Al-Mg-Si Ruban Dilatométrie Coefficient de dilatation thermique Anisotropie Nanocomposites Alloys Al-Mg-Si Ribbon Dilatometry Coefficient of thermal expansion Anisotropy سبائك الألمنيوم-مغنيزيوم-سيليسيوم الشريط معامل التمدد الحراري التباين مركبات النانومترية Index. décimale : 530 Physique Résumé :
The work undertaken in this thesis is reserved for the study of aluminium alloys of different shapes. We are interested in the role of thickness on the different mechanical, spectroscopic, thermodynamic and structural properties. The materials that were the subject of this thesis are the four AlMgSi alloys in the form of sheets obtained by rapid cooling containing several addition elements and two nanocomposites Al + 0.1%NTCM and Al + 1%NTCM. Concerning the sheets, an analysis of the different thermomechanical treatments was carried out using several investigation techniques. For the study of the coefficient of thermal expansion as a function of temperature, it was necessary to take three samples from each sheet in the directions X parallel to the rolling direction; Y perpendicular to the rolling direction and Z perpendicular to the rolling plane. For the purpose of this work, the characterization techniques are differential scanning calorimetry (DSC), thermogravimetry, dilatometry, optical microscopy, X-ray diffraction, microhardness, X-ray diffraction, Raman spectroscopy and infrared spectroscopy. The results of the DSC and dilatometry confirm the precipitation sequences in AlMgSi alloys and show the presence of anomalies whose shapes and intensities vary with temperature. In general, the behaviour is similar to that of conventional aluminium alloys, whose precipitation sequences are well studied. The presence of anisotropy is demonstrated by dilatometry.
Microhardness increases as thickness decreases. The X-ray diffraction study revealed only the presence of the aluminum matrix. The results for the ribbons obtained by DRX showed the presence of alumina and aluminium carbide. Thermogravimetry of nanocomposite reveals a low weight loss compared to pure aluminum Raman spectroscopy revealed the presence of two bands: the D band at 1300cm-1 connected to the disorder while the G band at 1590cm-1 represents the vibration of the sp2 sites. Infrared spectroscopy shows the presence of six peaks: Peak at 3746cm-1 is bound to the hydroxyl group (O-H) ; peak at 2341cm-1 is bound to the hydrogen bond due to oxygen-containing groups (CH...O) ; peak at 2358 cm-1 is bound to CO2 ; peak at 1651 cm-1 is bound to carboxyl functions ; peak at 1047 cm-1 is bound to the C-O bond and peak at 668 cm-1 is bound to aluminum oxide ( Al2O3).Diplôme : Doctorat en sciences En ligne : ../theses/physique/SAA7442.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11220 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité SAA/7442 SAA/7442 Thèse Bibliothèque principale Thèses Disponible
Titre : The effects of MWCNTs on iron–copper nanocomposites thermal-structural properties. Type de document : texte imprimé Auteurs : Mohamed Cherif Bouleklab, Auteur ; Smail Hamamda, Directeur de thèse Mention d'édition : 16/12/2021 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2021 Importance : 141 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Anglais (eng) Catégories : Français - Anglais
PhysiqueTags : Physics: Nanomaterials & Advanced Materials carbone nanotubes multiparois le coefficient de dilatation thermique Fe–Cu nanocomposites méchanochemique activation MWCNTs CTE Fe–Cu-nanocomposites Mechanochemical activation أنابیب الكربون النانومتریة معامل التمدد الحراري الخطي للمركب النانوي حدید–
نحاس التفعيل الميكانيكي -الكميائيIndex. décimale : 530 Physique Résumé :
The subject studied in the presented thesis is the effect of incorporating different concentrations of multiwall carbon nanotubes into iron-copper — Fe–Cu with a ratio of 4:1; MWCNTs of 0.5, 1.0 and 2.0 vol.%—nanocomposites—made via mechanical milling of different times of 20, 60 and 120 minutes— on the thermal and structural properties. The characterisations conducted were heat flow and thermogravimetry, the relative linear expansion (ΔL L ⁄ 0), coefficient of linear thermal expansion (CTE) for the thermal behaviour, on the other hand for the structural changes, x-ray diffraction, Raman spectroscopy and infrared absorptions were applied. Several temperature ranges were distinguished for the Fe–Cu–MWCNTs nanocomposite by the ΔL L ⁄ 0 (T) and CTE temperature dependences. Effect of CNTs on the ΔL L ⁄ 0 and CTE temperature dependences are different for different temperature ranges, and the magnitude of the effect depends on the CNTs content. The heat flow and thermogravimetry show thermal stability and higher calorific capacity for the samples with longer milling time and containing a higher concentration of CNTs. As for the coefficient of thermal expansion, an improvement in CTE of the Fe–Cu- 1% MWCNTs milled for 120 minutes. The provided x-ray diffraction patterns show a grain refinement for the 120 minutes milling time, also a homogenous distribution of CNTs (the absence of CNTs clusters appearing as carbon graphite) Raman spectroscopy reveals a higher defect density with a longer milling time, except for 60 minutes samples showing a lower defect density which indicates the healing and the recovery of CNTs. Infrared spectroscopy aid in showing the presence of functional groups in the samples and the establishment of multiple bonding types.Diplôme : Doctorat En ligne : ../theses/physique/BOU7853.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11842 The effects of MWCNTs on iron–copper nanocomposites thermal-structural properties. [texte imprimé] / Mohamed Cherif Bouleklab, Auteur ; Smail Hamamda, Directeur de thèse . - 16/12/2021 . - جامعة الإخوة منتوري قسنطينة, 2021 . - 141 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Anglais (eng)
Catégories : Français - Anglais
PhysiqueTags : Physics: Nanomaterials & Advanced Materials carbone nanotubes multiparois le coefficient de dilatation thermique Fe–Cu nanocomposites méchanochemique activation MWCNTs CTE Fe–Cu-nanocomposites Mechanochemical activation أنابیب الكربون النانومتریة معامل التمدد الحراري الخطي للمركب النانوي حدید–
نحاس التفعيل الميكانيكي -الكميائيIndex. décimale : 530 Physique Résumé :
The subject studied in the presented thesis is the effect of incorporating different concentrations of multiwall carbon nanotubes into iron-copper — Fe–Cu with a ratio of 4:1; MWCNTs of 0.5, 1.0 and 2.0 vol.%—nanocomposites—made via mechanical milling of different times of 20, 60 and 120 minutes— on the thermal and structural properties. The characterisations conducted were heat flow and thermogravimetry, the relative linear expansion (ΔL L ⁄ 0), coefficient of linear thermal expansion (CTE) for the thermal behaviour, on the other hand for the structural changes, x-ray diffraction, Raman spectroscopy and infrared absorptions were applied. Several temperature ranges were distinguished for the Fe–Cu–MWCNTs nanocomposite by the ΔL L ⁄ 0 (T) and CTE temperature dependences. Effect of CNTs on the ΔL L ⁄ 0 and CTE temperature dependences are different for different temperature ranges, and the magnitude of the effect depends on the CNTs content. The heat flow and thermogravimetry show thermal stability and higher calorific capacity for the samples with longer milling time and containing a higher concentration of CNTs. As for the coefficient of thermal expansion, an improvement in CTE of the Fe–Cu- 1% MWCNTs milled for 120 minutes. The provided x-ray diffraction patterns show a grain refinement for the 120 minutes milling time, also a homogenous distribution of CNTs (the absence of CNTs clusters appearing as carbon graphite) Raman spectroscopy reveals a higher defect density with a longer milling time, except for 60 minutes samples showing a lower defect density which indicates the healing and the recovery of CNTs. Infrared spectroscopy aid in showing the presence of functional groups in the samples and the establishment of multiple bonding types.Diplôme : Doctorat En ligne : ../theses/physique/BOU7853.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11842 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/7853 BOU/7853 Thèse Bibliothèque principale Thèses Disponible
