Friction and Wear Behaviours Between Ce-TZP-(Al_2O_3 ) Ceramics and Cr12 Steel

Friction and wear characteristics of Ce--TZP-(Al2O3 ) against Cr12 steel under the loads of100-500N were studied in different environments (air, water, acetic acid, ammonia solution).The wear mechanisms of zirconia ceramics were analyzed based on the morphology and phasecomposition of all worn surfaces. Under the load of 100N, the high friction coefficient and wearrate were measured and the main wear mechanism was abrasive wear in air; whereaas in liquid,the friction coefficient and wear rate were all low, and delamination became dominant. Under theload of above 200N, Mart,ensitic transformation occurred on the worn surfaces, and brittle fractureprocessing was the controlling mechanism. The friction coefficient decreased while the wear rateincreased with increasing load.