Thermal barrier coating for nickel and cobalt base super alloys

Details Thermal barrier coating for nickel and cobalt base super alloys Thermal barrier coating for nickel and cobalt base super alloys

1989-10-10

1992-04-07

Zimmerman, John

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428678, 428679, 428685, B32B 1504

Patent

active

RE0338761

ABSTRACT:
Adherent, thermal shock-resistant protective coatings for nickel base super alloys are obtained by applying to the base metal a thin bond coat of an alloy of chromium aluminum and yttrium with materials selected from the group consisting of iron, cobalt, nickel and nickel-cobalt and applying thereover a continuously graded mixture of this material with a zirconia-based ceramic, the concentration of zirconia-based ceramic increasing from the bond coat to the outer layer. The zirconia ceramic may be stabilized by the addition thereto of amounts of magnesium oxide or other materials.

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