Zirconia
ceramics have been regarded as one of the potential candidate materials for engineering applications.Many of these applications involve a prolonged contact with water and/or its solutions.However,until now,the research on the tribological behavior and
wear mechanisms of
Zirconia ceramics under water
lubrication are often conflicting.The tribological properties and wear mechanisms of yttria stabilized zirconia(3Y-TZP)ceramics under dry
friction and water lubrication were investigated.It was found that under water lubrication the friction coefficient of 52100 steel ball/TZP ceramics disc sliding couple decreased from 0.55～0 68 to 0.35,and the friction coefficient track became very smooth.The influences of water lubrication on the wear characteristics of TZP ceramics varies in respect to the specific test conditions such as
load.At the load of 20 N,the wear rate of TZP ceramics decreased from 23.0×10 -17 m 3/(N·m)in dry friction to 3.5×10 -17 m 3/(N·m)in water.While at the load of 60 N,the wear rates of TZP ceramics in both environments were very close.Scanning electron microscopy(SEM)and energy dispersed X-ray spectrometry(EDS)analysises prove that under dry friction the dominant wear mechanisms of TZP ceramics are surface fracture and abrasive wear,wbile under water lubrication,the main deterioration mechanisms of TZP ceramics are micro crack and micro ploughing.
More abstracts about the Friction and Wear Behavior of 3Y-TZP Ceramics and Their Mechanisms