Abstract
The current chapter describes research aimed at improving understanding of the high-temperature degradation mechanisms of thermal barrier coating (TBC) systems on different bond coats and single-crystal superalloys. The first part presents a systematic study aimed at demonstrating that the compatibility of modern nickel-base single-crystal superalloys with TBC systems is influenced strongly by the content of alloying element additions in the superalloy substrate. This is followed by a detailed study of the bond coat effect on TBC degradation, based on an electron beam physical vapour deposition (EB-PVD) yttrium stabilized zirconia (YSZ) top coat and a substrate material of CMSX-4 superalloy.
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