Durable thermal barrier coating

Details Durable thermal barrier coating Durable thermal barrier coating

1994-11-18

1996-10-08

Nguyen, Ngoc-Yen

Stock material or miscellaneous articles

All metal or with adjacent metals

Microscopic interfacial wave or roughness

428633, 428629, 428623, 428678, B32B 1504

Patent

active

055629989

ABSTRACT:
A thermal barrier coating for superalloy turbine engine vanes and blades that are exposed to high temperature gas is disclosed. The coating includes an Aluminide or MCrAlY layer, an alumina layer, and a ceramic top layer. The ceramic layer has a columnar grain microstructure. A bond inhibitor is disposed in the gaps between the columnar grains. This inhibitor is either unstabilized zirconia, unstabilized hafnia, or a mixture thereof.

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