This study revealed that polyphenyl ether lubricants form graphite-like tribofilms under electric fields and heating, significantly reducing friction. Electron irradiation confirmed their decomposition into sp² carbon structures, unlike PAO oils. Additionally, GLC films were successfully deposited using diphenyl ether as a precursor, with optimal properties at ～420℃. These GLC films outperformed conventional DLC coatings in high-temperature tribological performance, demonstrating their potential as advanced low-friction materials.
TANI et al. (Mon,) studied this question.