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.

我们通过结合原位和非原位分析阐明摩擦膜厚度、化学成分和摩擦系数之间的关系。一个原位反射观察过程中的摩擦试验在TA-C涂层的MoDTC衍生摩擦膜进行。结果表明，摩擦膜越厚，摩擦系数越低。此外，折射率随着摩擦力的降低而增加。XPS 分析表明，厚摩擦膜的最上表面比深层位置含有更高的 MoS ₂浓度。因此，生成的富含MoS _{2 的}摩擦膜被认为可以减少摩擦。此外，由于 MoS ₂摩擦膜磨损，摩擦增加。总之，我们使用一种新的原位光学测量方法开发了 MoDTC 衍生的摩擦膜形成模型。