Abstract
The effect of time during which SiC–50% Al2O3 is ground in steel drums on the particle size and phase composition is studied. The optimum hot-pressing temperature leading to complete shrinkage is determined in relation to grinding time. The composition and structure of the hot-pressed ceramics and their influence on the wear resistance in friction against a steel counterface are analyzed. The wear resistance of the ceramics monotonically decreases from 23.4 to 3.8 μm/km when grinding time increases from 1 to 16 h and increases to 5.8 μm/km for a grinding time of 32 h. The friction surfaces of SiC–Al2O3 ceramics are examined, and their wear mechanisms are established.
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