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Open Access The Platinum Development Initiative: Platinum-Based Alloys for High Temperature and Special Applications: Part I

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Under the auspices of the Platinum Development Initiative, platinum-based alloys are being developed for high-temperature and special applications requiring good corrosion and oxidation resistance. The best candidate system was found to be platinum-aluminium, after reviewing binary systems and assessing experimental ternary alloys. Ternary alloys based on Pt-Al, where the ternary additions comprised chromium, iridium, molybdenum, nickel, rhenium, ruthenium, tantalum, titanium and tungsten were tested. As well as phase characterisation work, mechanical and oxidation tests were undertaken. The best alloys were found to be Pt-Al-Cr and Pt-Al-Ru. The microstructures were similar to those of nickel-based superalloys, and comprise ~ Pt 3 Al precipitates in a Pt-based matrix. However, the volume fraction of the ~ Pt 3 Al was only ~ 40% instead of the ~ 70% found in Ni-based superalloys.

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Document Type: Research Article

Publication date: January 1, 2009

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