The influence of platinum on the failure of EBPVD YSZ TBCs on NiCoCrAlY bond coats

The failure of electron beam physical vapor deposition yttria stabilized zirconia thermal barrier coatings (TBCs) on NiCoCrAlY bond coats is described. It is shown that defects in the as-processed bond coats are responsible for TBC failures. By using a thin platinum layer deposited upon the NiCoCrAl...

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Veröffentlicht in:	Scripta materialia 2002-02, Vol.46 (4), p.325-330
Hauptverfasser:	Yanar, N.M, Meier, G.H, Pettit, F.S
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: structure, mechanical and thermal properties Exact sciences and technology Mechanical and acoustical properties NiCoCrAlY bond coats Physical properties of thin films, nonelectronic Physics Pt effects on TBCs Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) Thermal barrier coatings
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Zusammenfassung:	The failure of electron beam physical vapor deposition yttria stabilized zirconia thermal barrier coatings (TBCs) on NiCoCrAlY bond coats is described. It is shown that defects in the as-processed bond coats are responsible for TBC failures. By using a thin platinum layer deposited upon the NiCoCrAlY bond coat, it is shown that the lives of TBCs on such bond coats can be significantly extended since the as processed defects are removed.
ISSN:	1359-6462 1872-8456
DOI:	10.1016/S1359-6462(01)01222-2