Lubricating Characteristics of Polyimide Bonded Graphite Fluoride and Polyimide Thin Films

Abstract
A friction and wear life study was conducted on the use of a polyimide (PI) varnish as a binder for the solid lubricant, graphite fluoride (CF1.1)n. Also studied were the lubricating properties of PI thin films with no solid lubricant additives. For comparison, similar experiments on PI-bonded MoS2 and burnished films of MoS2 or (CF1.1)n were conducted. The best results were obtained with the PI-bonded (CF1.1)n films. The polyimide thin films (with no solid lubricant additives) did not lubricate well at 25 C; however, when heated to 100 C, low friction and long wear lives were obtained.