Improvement of wear resistance of Partially Stabilized Zirconia by Shot Peening

Abstract

The effect of shot peening on the wear resistance of partially stabilized zirconia (PSZ) was investigated. PSZ plate specimens with shot peening (SP), without SP (Non-SP), and polished specimens after SP (SP+Polished) were prepared. Ball on plate tests were carried out using the specimens in air under dry condition. The wear volume of SP specimens was higher than Non-SP specimens, however, that of SP+Polished specimens was lower than that of Non-SP. The wear resistance of SP+Polished specimens increased because the surface dents introduced by SP were removed and the compressive residual stress and surface hardness were the highest among the specimens. This result indicates that the combination of SP and polishing is an effective method to increase the wear resistance of PSZ.