Research Progress of Platinum-Based Superalloys for High Temperature Applications

Abstract

Pt-based alloys are being developed for high-temperature applications with the aim of replacing some of the currently used Ni-based superalloys (NBSAs) and benchmark alloy, PM2000. The Pt-based superalloys have a similar structure to the NBSAs and can potentially be used at higher temperatures and in more aggressive environments because Pt is more chemically inert and has a higher melting point. In this paper, the recent progress in research and development of Pt-based superalloys is overviewed. Firstly, the composition optimization and structural design of Pt-base superalloys are introduced. The structural characteristics, mechanical properties, oxidation resistance and corrosion behavior of Pt-Al ternary, quaternary and multiple superalloys are summarized. Finally, directions for further research and application of Pt-base superalloys are analyzed and prospected.