Wear of water lubricated silicon nitride in ball on disc test
Wear of water lubricated silicon nitride in ball on disc test
复制标题
DOI：
10.1179/175158310x12626998129833
复制
发表时间：
2010-01-01
影响因子：
1.3
通讯作者：
Iliev, C.
中科院分区：
文献类型：
--
作者：
Iliev, C.
球盘测试配置优于平头销盘测试配置，因为球是自对准的，并且与销相比，球上的磨损测量具有更高的精度。氮化硅，在水中滑动本身，用球盘摩擦试验机进行了测试。分析了摩擦力测量中试球与圆盘旋转轴后的正确位置不重合所引起的测量误差。盘磨损不均匀，磨损痕迹深度和宽度在纵向上变化2-3倍。摩擦盘的不均匀磨损一方面是由滑动表面各向异性和摩擦盘材料非均匀性的综合影响，另一方面是由摩擦力和法向载荷的周期性变化引起的。在特定滑动速度下的磨合过程中，观察到了调幅摩擦力，并提出了机械振动“拍”现象的解释。建立了磨合过程的预测模型，该模型描述了磨痕面积、接触压力和磨损率的演变过程。模型预测结果与实验数据吻合较好。
The ball on disc test configuration is preferred to the flat ended pin on disc because the ball is self-aligned and measurement of wear on the ball is of higher accuracy, compared to the pin. Silicon nitride, sliding on itself in water, was tested with the ball on disc tribometer. Misalignment of the test ball from its proper position behind the disc axis of rotation leads to friction measurement errors, which were analysed. The disc wears non-uniformly, the wear track depth and width vary in longitudinal direction by a factor of 2-3. The uneven wear of the disc is explained by the combined effects of sliding surface anisotropy and disc material non-homogeneity on the one hand and by the friction force and the normal load periodic variation on the other hand. During the running-in process at particular sliding velocity amplitude modulated friction force was observed and an explanation by the mechanical vibration 'beating' phenomenon was suggested. Predictive model of the running-in process is presented, which describes the evolution of the ball wear scar area, the contact pressure and the wear rate. The model predictions are consistent with the experimental data.