Abstract: Friction and wear characteristics of Ce-TZP-(Al₂O₃ ) against Cr₁₂ steel under the loads of 100--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 phase composition of all
worn surfaces. Under the load of 100N, the high friction coefficient and wear rate were measured and the main wear mechanism was abrasive wear in air; whereas
in liquid, the friction coefficient and wear rate were all low, and delamination became dominant. Under the load of above 200N, Martensitic transformation occurred on the worn surfaces, and brittle fracture processing
was the controlling mechanism. The friction coefficient decreased while the wear rate increased with increasing load.

Key words: Ce-TZP-(Al₂O₃), friction &, wear, Martensitic transformation, abrasive wear, delamination