Intermetallic Bond Coats: Systems Compatibility and Platinum-Group Metal Additions

Authors :: Dan Widrevitz
Bryan Tryon
Fang Cao
Russell Pong
Tresa M. Pollock
Source :: MRS Proceedings. 1128
Publication Year :: 2008
Publisher :: Springer Science and Business Media LLC, 2008.
Abstract: Intermetallic interlayers are key to the performance of thermal barrier coating systems. The role of platinum group metal (PGM) additions to B2 bond coat interlayers has been investigated with emphasis on diffusional aspects of coating structure evolution and properties. Additions of Ru and Ir to NiAl reduce interdiffusion and the resultant thickness of the coating and interdiffusion zone. Relative to Pt and Pd, Ru and Ir slow diffusion. Ru additions to NiAl increase creep resistance but degrade oxidation kinetics.

Subjects :: Nial
Materials science
Kinetics
Metallurgy
Intermetallic
engineering.material
Platinum group
Metal
Thermal barrier coating
Chemical engineering
Creep
Coating
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