Abstract
ZA22-Al 2O 3 composites were prepared by means of a squeeze casting process. The effects of fibre volume friction ( V f ), applied load, time and fibre orientation on the dry friction and wear behaviour were studied. The results show that the wear resistance and the coefficient of friction of the composites increased with V p. The wear weight loss of the composite during wear testing increased with the applied load or the wearing time. The weight loss and the coefficient of friction were related to the fibre orientation. Both the weight loss and the coefficient of friction were smaller when fibres were normal to the friction surface than when fibres were parallel to it. The coefficient of friction decreased with load, and increased with time. An Fe-rich layer about 10 μm thick on the wear surface was found by means of scanning electron microscopy (SEM) and an energy spectrometer. The wear mode of the ZA22 alloy is mainly ploughing groove and adhesion, while the wear mode of the ZA22-Al 2O 3 composite is mainly slight ploughing groove and oxidization.
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