Heat-resistant member

Details Heat-resistant member Heat-resistant member

1995-05-19

1996-11-26

Jordan, Charles T.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428548, 428551, 428552, 428553, 428557, 4289088, B22F 704

Patent

active

055795340

ABSTRACT:
A heat-resistant member is constructed by having a ceramic coating layer deposited on the surface of a metallic substrate through the medium of a metallic bonding layer. The metallic bonding layer is composed of at least two layers, i.e. a layer of an aggregate of minute particles disposed on the metallic substrate side and a layer of an aggregate of coarse particles disposed on the ceramic coating layer side. Otherwise, the metallic bonding layer is composed of at least three layers, i.e. two layers of an aggregate of coarse particles disposed one each on the metallic substrate side and the ceramic coating layer side and one layer of an aggregate of minute particles interposed between these two layers of an aggregate of coarse particles. These layers are obtained by the low pressure ambient plasma thermal spraying using a fine powder or a coarse powder of an alloy resistant to corrosion and oxidation. The metallic bonding layer constructed as described above is excellent in the ability to resist high temperature oxidation and high temperature corrosion and stable to tolerate thermal fatigue and thermal impacts. Thus, it is capable of preventing the thermal barrier coating layer from sustaining cracks or inducing film separation.

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