Estimation of the Friction Coefficient of a Nanostructured Composite Coating

Abstract

The frictional-mechanical properties of a thin polymer-ceramic coating obtained by gas-phase impregnation of nanoporous anodic alumina with a fluoropolymer (octafluorocyclobutane) have been investigated. The coefficient of sliding friction of the coating is predicted based on an analysis of contact deformation within the framework of the Winkler elastic foundation hypothesis and a three-phase micromechanical model. It is shown that an acceptable prediction accuracy can be obtained considering the uniaxial strain state of the coating. It was found that, on impregnation by the method of plasmachemical treatment, the relative depth of penetration of the polymer increased almost in proportion to the processing time. The rate and maximum possible depth of penetration of the polymer into nanoscale pores grew with increasing porosity of the alumina substrate.

Effect of Random Pre-Stressed Friction Loss on the Performance of a Suspen-Dome Structure

“…New tribological theories view the FC as a comprehensive characteristic of the friction pair system, instead of an inherent characteristic of the material. It is affected by the pairing properties of material pair, static contact time, normal load, loading speed, stiffness of friction pair, sliding speed, contact geometry and physical properties of surface layer, chemical actions of environmental medium, and so on [23][24][25][26]. During the sliding process of the HC, a friction pair is formed at the cable-strut joint.…”