Thermal barrier coating having nano scale features

Details Thermal barrier coating having nano scale features Thermal barrier coating having nano scale features

2004-04-02

2008-08-19

Turner, Archene (Department: 1794)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

C428S216000, C428S323000, C428S469000, C428S472000, C428S701000, C428S702000

Reexamination Certificate

active

07413798

ABSTRACT:
A ceramic thermal barrier coating material (10) containing nano-sized features is predicted to exhibit improved high temperature performance than a comparable material containing fewer of such features. In a coating deposited by an APS process, the nano-sized features may be intersplat columns (32). In a coating deposited by an EB-PVD process, the nano-sized features may be a mixed oxide layer (22) formed of nano-sized mixed oxide particles, or nano-sized alumina projections (24) extending across the interface from the mixed oxide layer into the insulating material layer (20). Alternatively, the nano-sized features may be secondary columnar grains (36) extending laterally from primary columnar grains (34) in a columnar-grained ceramic material.

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Burns, A.J., et al. Microstructure of as-coated thermal barrier coatings with varying lifetimes. Surface and Coatings Technology 177-178 (2004), pp. 89-96.

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