Andrey Voevodin, UNT Engineering Associate Dean for Research, will present a seminar on adaptive surfaces for friction and wear reduction from 8-9 a.m. June 25.
Adaptive low friction and wear resistant coatings, which can re-arrange their structure and chemistry in a response to changes in operating environment are of a practical importance for aerospace, automotive and tool industry. Surface engineering approaches for adaptive friction and wear reduction are presented including laser textured surfaces with embedded solid lubricants, composite coatings made of hard nano-crystalline carbide, nitride and oxide matrices with nano-sized inclusions of solid lubricants and transition metals capable for a formation of high temperature lubricating oxides, duplex coatings based on plasma electrolytic oxidation of light weight alloys to form wear protective oxide coatings with embedded adaptive lubricants for wear reduction at elevated temperatures, and others. In all these approaches, the lubricating materials are released from embedded reservoirs, facilitating tribo-contact surface changes, to continuously reduce friction and wear in cycled humidity or under variable temperature conditions. The discussions include methods for in-situ characterization and identification of the self-adaptive mechanisms.