Wear Resistance Anomaly of Magnesia Partially Stabilized Zirconia

Publisher Website
Google Scholar
Abstract
An experimental investigation of the wear behavior of magnesia partially stabilized zirconia showed that up to three orders of magnitude increase in the wear resistance can be achieved in a particular temperature range. The wear resistance is a function of both the sliding speed and the ambient temperature. The friction coefficient is also a function of these two parameters. The maximum friction coefficient was observed at the maximum wear resistance temperature. Friction and wear measurements, together with background information on structural analysis, were used to develop a phenomenological model that could explain the wear and friction temperature behavior. The model is based on the following chain of event that could take place at the frictional interface: spatial overheating of the surface regions, phase transformation of the overheated areas, cooling, volume expansion, and development of a compressive stress field on the surface.