Paper number 896

FABRICATION AND WEAR BEHAVIOUR OF AN ALUMINIUM MATRIX COMPOSITE REINFORCED WITH A HIGH CONTENT OF SILICON CARBIDE PARTICLES

R. FernŠndez2, Y.Lepetitcorps1, L.Albingre1, J.Coleto2 and J.GoŮi2

1CNRS-ICMCB (Institut de Chimie de la MatiŤre Condensťe de Bordeaux), Ch‚teau Brivazac, A. du Docteur Schweitzer, 33608 Pessac cedex, France
2INASMET, Composite Materials Department, C. de Portuetxe,12; 20.009 San SebastiŠn, Spain

Summary Aluminium matrix composites reinforced with silicon carbide particles (SiCp) are of great interest for several automotive applications due to their notably high wear resistance. On the other hand, the electronic industry is very interested in new materials for electronic packaging to meet the needs arising from issues such as increasing packaging density, more severe environments, weight restrictions, etc. Among the most important needs can be mentioned low CTE, high thermal and electrical conductivities or low density for weight-critical systems.
The life time of these components could be further improved by increasing the final volume fraction content (Vf) of the hard ceramic particles. In this way, high content Al/SiCp composites have been already manufactured by means of powder metallurgy techniques but their final price is too high for their application at a commercial scale. As a result of this study, a modified casting sequence of a conventional Al-Si/SiCp (15% volume fraction) composite has been developed to increase the final volume fraction of the SiCp to the range of 50-60%v.
Keywords casting, wear properties, silicon carbide particles, automotive applications, electronic packaging.

Theme : Metal Matrix Composites ; Processing and Forming

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