Evolution of alloying elements during outgassing in an aluminium zinc magnesium alloy made by powder metallurgy

Véronique Chiavazza 1, 2 Christophe Pijolat 1, 2 René Lalauze 1, 2
1 MICC-ENSMSE - Département Microsystèmes, Instrumentation et Capteurs Chimiques
2 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
Abstract : To obtain high-quality produces from aluminium alloys powders, degassing is usually carried out before consolidation. But, in the case of Al-Zn-Mg alloys an evaporation of alloying elements may occur during outgassing. The aim of this work was to determine the influence of degassing conditions (temperature, pressure, nature of the gaseous atmosphere) on the stability of the alloy composition. These studies were performed on X7091 alloy by means of thermogravimetry and temperature-programmed desorption technique. The results show that liberation of alloying elements is closely connected with the evolution of the surface oxide layer which itself depends on various thermodynamic and kinetic parameters. The role of water vapour in the gaseous environment was particularly emphasized.
Keywords : aluminium alloys powders Al-Zn-Mg alloys
Type de document :
Article dans une revue
Journal of Materials Science, Springer Verlag, 1988, 23 (8), pp.2960-2964. 〈10.1007/BF00547475〉
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https://hal-emse.ccsd.cnrs.fr/emse-00435891
Contributeur : Andrée-Aimée Toucas <>
Soumis le : mercredi 25 novembre 2009 - 11:25:19
Dernière modification le : mercredi 29 novembre 2017 - 10:08:22

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Véronique Chiavazza, Christophe Pijolat, René Lalauze. Evolution of alloying elements during outgassing in an aluminium zinc magnesium alloy made by powder metallurgy. Journal of Materials Science, Springer Verlag, 1988, 23 (8), pp.2960-2964. 〈10.1007/BF00547475〉. 〈emse-00435891〉

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