Wear-mapping to optimize overlay coating design in rolling sliding contacts

摘要

The design of surface coatings for tribological applications in rolling sliding contacts not only requires a thorough understanding of the tribological conditions e.g. contact stress, lubrication and friction but also the influence of coating processes, material, thickness and the role of substrate material properties. Tribologists often have little choice about the former but can significantly influence the coating performance by appropriate selection of the latter. This research paper addresses the benchmark design requirements of such overlay coatings produced by thermal spraying process and introduces the wear map based upon the understanding of failure modes. Results presented here give a generic understanding of the performance and design parameters of cermet coating design for rolling sliding contacts, and thus represent a step forward in the development of future overlay coatings for high stress applications.