Single-crystal article having crystallographic orientation optim

Details Single-crystal article having crystallographic orientation optim Single-crystal article having crystallographic orientation optim

1997-01-17

1998-12-01

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

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

428680, 148404, 427405, 416241R, 416241B, B22B 1504, F01D 528

Patent

active

058435867

ABSTRACT:
A single-crystal article having a thermal barrier coating on a surface thereof, and a method for processing the article so as to promote the life of the coating. As a result of its single-crystal microstructure, the article is characterized by having been unidirectionally solidified along a primary crystallographic direction, and secondary crystallographic directions that are normal to the primary crystallographic direction. Improved spallation resistance of the coating is achieved by selectively orienting the secondary crystallographic direction with respect to a direction normal to a life-limiting surface region of the thermal barrier coating.

REFERENCES:
patent: 4580613 (1986-04-01), Miller et al.
patent: 4605452 (1986-08-01), Gemma et al.
patent: 5062469 (1991-11-01), Monte et al.
patent: 5682747 (1997-11-01), Brown et al.

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