Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2023 - September 06, 2023
Reaction films derived from lubricant additives have a significant impact on friction and wear properties, especially under boundary lubrication. However, the formation process and friction mechanism are not yet fully understood due to the complex phenomena at the friction interface, such as dramatic changes in temperature and stress with sliding time, and the state of various molecules in the lubricant. To understand the friction mechanism dominated by the reaction film, in-situ observation of the friction interface is effective because it makes it possible to grasp the accurate phenomena.
In this study, we have developed an in-situ tribometer with a Raman spectrometer incorporating a scanning probe microscopy that can simultaneously measure the surface profile and chemical composition in a minute area on the sliding surface while applying high stress (approximately 1.0 GPa). As a result, we confirmed Raman shifts of the reaction film between atmospheric and high pressure. This new device will lead to a better understanding of accurate friction phenomena at high contact pressure.
