Abstract
AbstractPowder lubrication can effectively reduce friction under extreme conditions, but powder filling and storage are yet to be improved. In this study, the evolution of the powder boundary layer on microtextured surfaces is investigated. The effect of load and speed on the friction properties of the microtexutured surface is also revealed by using a multifunctional friction and wear tester. Interrupted laser microscopy and profilometry measurements of the friction surface show 4 evolution stages of the powder boundary layer development: localised formation, complete formation, local spalling, and large scuffing of the boundary layer. The steady state boundary layer is characterised with many tadpole‐shaped units and exhibits better lubricity under high load and speed, which effectively delay the damage and improve the life of frictional samples. The present work may provide some new insights to engineers and researchers in designing surface micro/nanotextures with better lubricity and wear resistance.
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