In situ observation of the formation of MoDTC-derived tribofilm on a ta-C coating using reflectance spectroscopy and its effects on friction
In situ observation of the formation of MoDTC-derived tribofilm on a ta-C coating using reflectance spectroscopy and its effects on friction
复制标题
DOI：
10.1016/j.triboint.2021.107128
复制
发表时间：
2021-06-18
影响因子：
6.2
通讯作者：
Lee, Woo-Young
中科院分区：
文献类型：
--
作者：
Hashizume, Naoya;Murashima, Motoyuki;Lee, Woo-Young
我们澄清摩擦膜厚度，化学成分，并结合原位和非原位分析摩擦系数之间的关系。在摩擦试验过程中，对ta-C涂层上MoDTC衍生的摩擦膜进行了原位反射观察。结果表明，摩擦膜越厚，摩擦系数越低。此外，折射率随着摩擦减小而增大。XPS分析表明，厚的摩擦膜的最高表面包含比深的位置更高的MoS 2浓度。因此，所产生的富含MoS 2的摩擦膜被认为降低了摩擦。此外，随着MoS 2摩擦膜磨损，摩擦增加。总之，我们已经开发了一个MoDTC衍生的摩擦膜形成模型，使用一种新的方法，在原位光学测量。
We clarify the relationships between tribofilm thickness, chemical composition, and friction coefficient by combining in situ and ex situ analyses. An in situ reflectance observation is conducted for MoDTC-derived tribofilm on a ta-C coating during friction tests. The results show that the thicker the tribofilm is, the lower the friction coefficient. In addition, the refractive index increases as friction decreases. XPS analysis shows that the topmost surface of the thick tribofilm contains a higher MoS2 concentration than the deep position. Therefore, the generated MoS2-rich tribofilm is considered to reduce friction. In addition, as the MoS2 tribofilm wears out, friction increases. In conclusion, we have developed a MoDTC-derived tribofilm formation model using a new method of in situ optical measurement.