干摩擦条件下3Y-TZP/(Mg,Y)-PSZ陶瓷摩擦副的磨损性能的研究

Wear Properties of 3Y-TZP/(Mg, Y)-PSZ Ceramic Pair under Dry Conditions

采用销盘式摩擦磨损试验机在干摩擦条件下对3YTZP/(Mg,Y)-PSZ陶瓷摩擦副的磨损性能进行了试验研究。结果表明,3Y-TZP陶瓷的磨损率随着载荷的增加而增大。在低载低速下3Y-TZP陶瓷的主要磨损机制为塑性变形;随着载荷与滑动速度的增加,磨损主要由塑性变形和微断裂造成;在高载高速时,由于对摩偶件(Mg,Y)-PSZ表面的断裂、脱落,形成的磨屑产生磨料磨损对摩擦副表面造成进一步损伤,脆性断裂和磨粒磨损机制是其主要的失效方式。

The tribological properties of 3Y-TZP ceramic/(Mg, Y)-PSZ ceramic pairs were investigated using a pin-on-disk friction and wear test apparatus under dry reciprocating sliding. The results show that the wear rate of 3Y-TZP ceramic is increased with the increase of the normal load. At low normal load and sliding speed, the main wear mechanism of 3Y-TZP is plastic deformation. Along with the increase of normal load and sliding speed, the wear is related to plastic deformation and micro-fracture. At very high normal load and sliding speed, the main wear mechanism is brittle fracture and abrasive wear due to the debris from the (Mg, Y)-PSZ ceramic.