Abstract
The wear behavior and the mechanism of plasma sprayed WC12Co, Cr2 O 3 and ΑI2 O3 coatings in sliding contact with steel bronze and carbon graphite were studied with block-on-ring arrangement. The coefficient of friction and wear rate of these coatings were measured at dry friction conditions. The worn surfaces of the coatings were examined employing the ' scanning electron microscope. The results obtained that the wear mechanism of coatings changes for different kinds of layers.
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