The role of sintering additives on synthesis of cermets by auto-combustion
Identifieur interne : 000406 ( Main/Exploration ); précédent : 000405; suivant : 000407The role of sintering additives on synthesis of cermets by auto-combustion
Auteurs : Mahieddine Ali-Rachedi [Algérie] ; Wisseme Ramdane [Algérie] ; Dominique Vrel [France] ; Abdelaziz Benaldjia [Algérie] ; Patrick Langlois [France] ; Mohamed Guerioune [Algérie]Source :
- Powder technology [ 0032-5910 ] ; 2010.
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Abstract
The purpose of this work is to decrease or eliminate porosities in SHS products with sintering additives. The Ti-C system has been synthesized for its advantages for refractory, abrasive and structural applications. We attempted to densify TiC by using Nickel addition; this metal is introduced through a secondary reaction 3NiO+2Al. This mixture reacts exothermically and the heat is released according to 3NiO+2Al-.AlzO3+3Ni. So, the introduction of the Al2O3 diluent with the starting reactants is necessary because of the explosive character of the thermite reaction. Thus, doping method is finally used to fabricate materials by SHS method (self-propagating high temperature synthesis). Final products were analysed by X-ray diffraction and scanning electron microscopy.
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J-B. Clément</s1><s2>93430 Villetaneuse</s2><s3>FRA</s3><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Villetaneuse</settlement></placeName><orgName type="university">Université Paris 13</orgName></affiliation></author><author><name sortKey="Guerioune, Mohamed" sort="Guerioune, Mohamed" uniqKey="Guerioune M" first="Mohamed" last="Guerioune">Mohamed Guerioune</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Lahoratoire d'Etude et de Recherche des Etats Condensés (LEREC), Département de Physique, Université Badji Mokhtar BP12 Annaha</s1><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>Lahoratoire d'Etude et de Recherche des Etats Condensés (LEREC), Département de Physique, Université Badji Mokhtar BP12 Annaha</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Powder technology</title><title level="j" type="abbreviated">Powder technol.</title><idno type="ISSN">0032-5910</idno><imprint><date when="2010">2010</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Powder technology</title><title level="j" type="abbreviated">Powder technol.</title><idno type="ISSN">0032-5910</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Abrasives</term><term>Additive</term><term>Combustion</term><term>Doping</term><term>Explosives</term><term>Porosity</term><term>Refractory</term><term>Scanning electron microscopy</term><term>Sintering</term><term>X ray diffraction</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Frittage</term><term>Additif</term><term>Combustion</term><term>Porosité</term><term>Réfractaire</term><term>Abrasif</term><term>Explosif</term><term>Dopage</term><term>Diffraction RX</term><term>Microscopie électronique balayage</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Explosif</term><term>Dopage</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The purpose of this work is to decrease or eliminate porosities in SHS products with sintering additives. The Ti-C system has been synthesized for its advantages for refractory, abrasive and structural applications. We attempted to densify TiC by using Nickel addition; this metal is introduced through a secondary reaction 3NiO+2Al. This mixture reacts exothermically and the heat is released according to 3NiO+2Al-.Al<sub>z</sub>O<sub>3</sub>+3Ni. So, the introduction of the Al<sub>2</sub>O<sub>3</sub> diluent with the starting reactants is necessary because of the explosive character of the thermite reaction. Thus, doping method is finally used to fabricate materials by SHS method (self-propagating high temperature synthesis). Final products were analysed by X-ray diffraction and scanning electron microscopy.</div></front></TEI><affiliations><list><country><li>Algérie</li><li>France</li></country><region><li>Île-de-France</li></region><settlement><li>Villetaneuse</li></settlement><orgName><li>Université Paris 13</li></orgName></list><tree><country name="Algérie"><noRegion><name sortKey="Ali Rachedi, Mahieddine" sort="Ali Rachedi, Mahieddine" uniqKey="Ali Rachedi M" first="Mahieddine" last="Ali-Rachedi">Mahieddine Ali-Rachedi</name></noRegion><name sortKey="Benaldjia, Abdelaziz" sort="Benaldjia, Abdelaziz" uniqKey="Benaldjia A" first="Abdelaziz" last="Benaldjia">Abdelaziz Benaldjia</name><name sortKey="Guerioune, Mohamed" sort="Guerioune, Mohamed" uniqKey="Guerioune M" first="Mohamed" last="Guerioune">Mohamed Guerioune</name><name sortKey="Ramdane, Wisseme" sort="Ramdane, Wisseme" uniqKey="Ramdane W" first="Wisseme" last="Ramdane">Wisseme Ramdane</name></country><country name="France"><region name="Île-de-France"><name sortKey="Vrel, Dominique" sort="Vrel, Dominique" uniqKey="Vrel D" first="Dominique" last="Vrel">Dominique Vrel</name></region><name sortKey="Langlois, Patrick" sort="Langlois, Patrick" uniqKey="Langlois P" first="Patrick" last="Langlois">Patrick Langlois</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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