Microbubble Phenomenon in the Grease Lubricating Film Induced by Micro-Oscillation

Abstract

A microbubble phenomenon induced by microoscillation in the grease lubricating film confined within a nanogap between a highly polished steel ball and a smooth glass disc has been observed with an interferometer. Experimental results show that when the micro-oscillation frequency is a constant value, the microbubble number increases with the micro-oscillation amplitude. When the micro-oscillation amplitude is a constant value, the microbubble number increases with the micro-oscillation frequency when the latter is lower than the critical value and decreases with the micro-oscillation frequency when it is higher than the critical value. Theoretical models and analyses have been used to discuss the bubble formation and describe the characteristics of bubble movement.

Study on antifriction mechanism of lubricating wear-resistant coating with parallel texture

“…To reduce wear and maintain friction pairs' working stability and reliability, self-lubricating materials need achieve not only good lubrication, but also a high wear resistance. In the working process, it is the key to reducing friction and wear, whether solid antifriction lubricating film can form on the friction surface (Bai et al, 2013;Zuo et al, 2012;Liu et al, 2013). This paper aims to combine laser surface remelting technology and surface texturing technology to implement structural modulation for lubricating wear-resistant coating deposited by supersonic spray, with parallel pit-type texture formed on the coating to improve its tribological properties.…”