Thermal barrier coating for metallic components

Details Thermal barrier coating for metallic components Thermal barrier coating for metallic components

1991-07-29

1993-08-17

Walsh, Donald P.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428548, 428551, 428553, 428554, 428561, 4285395, 428564, 428565, B22F 102

Patent

active

052367878

ABSTRACT:
A coating for a metallic substrate has a metallic bond coat, a metallic seal coat and a centrally disposed layer of ceramic material. Transition layers comprising a controllably positioned mixture of metallic and ceramic materials are interposed, respectively, between the bond coat and the central layer of ceramic material, and between the seal coat and the central layer of ceramic material. The coating provides a desirable thermal barrier for internal engine components. Further, the coating is graded to avoid harmful internal thermal stress between dissimilar materials in the coating, and has a sealed external surface that is resistant to corrosion, erosion, hot gas infiltration, and wear during operation in an internal combustion engine.

REFERENCES:
patent: 3091548 (1963-05-01), Dillon
patent: 3324543 (1967-06-01), McVey et al.
patent: 3911891 (1975-10-01), Dowell
patent: 4495907 (1985-01-01), Kamo
patent: 4588607 (1986-05-01), Matarese et al.
patent: 4713300 (1987-12-01), Sowman et al.
patent: 4956137 (1990-09-01), Dwivedi
W. F. Calosso, et al, "Process Requirements for Plasma Sprayed Coatings for Internal Combustion Engine Components", The American Society of Mechanical Engineers, 87-Ice-15, Feb. 1987, pp. 1-8.

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