Zirconia Ceramics and Mechanical Surface Interactions

摘要

A study to obtain some understanding about the influence of mechanical surfaceinteractions, grinding and wear, on zirconia ceramics, is presented. Most of the study was performed on Mg-PSZ (Nilcra). Other zirconia ceramics investigated and compared to Mg-PSZ (Nilcra), were Mg-PSZ (feldmuehle), Y-TZP (feldmuehle) and Y-TZP (dynamic ceramic). It can be stated that there are significant differences in surface mechanical behavior between Mg-PSZ and Y-TZP. The residual stress profile and strength behavior of worn samples are different. During wear testing at low loads, adhesion and plastic deformation play a major role. At high loads, fracture becomes more important. Band formation is observed for some wear systems with Y-TZP.