Abstract
Abstract In this study, high temperature wear behaviour of commercially pure A1 matrix and Al-8 wt.% Mg alloy matrix composites reinforced with 60 vol.% SiC p were compared. Composites were produced by pressure infiltration technique and their tribological performance were examined by abrasive wear tests at various temperatures up to 500°C. Wear tests were carried out under normal stress of 0.7 N/mm 2 by rubbing on 125 μm Al 2 O 3 abrasive grains bonded to belts. At all testing temperatures, the Al-8 wt.% Mg alloy matrix composite exhibited lower wear rate than that of pure Al matrix composite. Wear rates of the composites were almost independent from test temperatures up to 200°C. At temperatures higher than 200°C, the wear rate of both composites increased dramatically with increasing test temperature.
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