工程陶瓷-典型金属摩擦副的摩擦学性能及组合优化

Optimization and Tribological Performance of Engineering Ceramics via Representative Metals Pairs

以Si3N4,SiC,ZrO2分别与45钢,GCr15,锡青铜QSn4-3,锡基巴氏合金ZChSnSb8-4组成的摩擦副为研究对象,对微量润滑条件下的工程陶瓷-金属摩擦副进行了摩擦磨损正交实验。结果表明:陶瓷-金属摩擦副整体具有良好的摩擦学性能,摩擦因数为0.1~0.25,陶瓷和金属偶件的磨损率均较低,为10-7 mm3/(N·m)数量级。其中,Si3N4-巴氏合金的摩擦因数最低,SiC-巴氏合金的磨损率最小。Si3N4具有自润滑特性,摩擦表面能够形成氧化膜,使其与金属组合具有较佳的摩擦学性能。锡基巴氏合金作为对磨件,易与陶瓷形成金属化合物润滑膜,其摩擦性能优于其他三种金属,Si3N4-锡基巴氏合金组合摩擦学性能最为优异。

The friction and wear orthogonal tests for three types of engineering ceramics such as Si3N4,SiC,ZrO2 and representative metals such as 45 steel,GCr15bearing steel,tin bronze QSn4-3,tinbased babbit ZChSnSb8-4under oil-less lubrication were carried out.The results show that ceramicsmetals pairs possess good tribological performance on the whole.The friction coefficients are between0.1-0.25.The wear rates of ceramics and metals are 10-7 mm3/(N·m)in magnitude.The friction coefficient of Si3N4-babbit is the lowest,and so is the wear rate of SiC-babbit.Due to the self-lubricating property of Si3N4,Si3N4-metals have better tribological performance prominently as a result of oxide film formed on the surface.As the material of the pair sample,tin-based babbit is able to form film of metals oxide,which shows that it possesses better tribological performance than the other tested metals.The Si3N4-babbit pair has the optimum tribological performance.