Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part – Erodable or permanently deformable
Patent
1995-09-26
2000-08-15
Thibodeau, Paul
Rotary kinetic fluid motors or pumps
Bearing, seal, or liner between runner portion and static part
Erodable or permanently deformable
4151745, 428610, 428633, 428926, F01D 500, F01D 1102, B22D 2500, C03C 2702
Patent
active
061026565
ABSTRACT:
A segmented abradable ceramic coating system having superior abradability and erosion resistance is disclosed. The system includes a duct segment having a metallic substrate, a MCrAlY bond coat on the substrate and a segmented abradable ceramic coating on the bond coat. The segmented abradable ceramic coating includes a base coat foundation layer, a graded interlayer and an abradable top layer for an overall thickness of preferably about 50 mils (1.270 mm). The coating is characterized by a plurality of vertical microcracks. By precisely controlling the deposition parameters, composition of the layers and layer particle morphology, segmentation is achieved, as well as superior abradability and erosion resistance.
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Foster George E.
Godin Daniel R.
Harter Harold D.
Nissley David M.
Boyd, Esq. John E.
Rickman Holly C.
Thibodeau Paul
United Technologies Corporation
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