R&sumS -Le matsriau SiSiC est intgressant pour de nombreuses applications telles que les roulements, bagues dt6tanch6it6 ou piSces de pompes du fait de ses excellentes propri6tSs tribologiques. Cependant le comportement du mat6riau n'est pas satisfaisant dans des conditions de fonctionnement purement 3 sec. Un materiar SiSiC modifie avec differentes teneurs en particules de carbone a Et& dbveloppe, il combine la grande resistance 3 l'usure du SiSiC et le faible coefficient de frottement du carbone. Le comportement tribologique de ces matsriaux ainsi que les mecanismes d'usure ont Et6 &tudi&s.Abstract -SiSiC-ceramic is useful for many applications ie bearings, se-a1 rings or pump parts because of its excellent tribological properties. Exceptionally under purely dry running conditions the material's behaviour is unsatisfying. Modified SiSiC with different content of carbon particles was developed which combine the high wear resistance of SiSiC and the low friction coefficient of carbon. For these materials the tribological behaviour and the wear mechanism was invetigated.
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