Research progress of platinum-based superalloys for high temperature applications platinum-aluminium ternary, quaternary and multiple alloys with excellent prospects for future use

Abstract

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