Abradable shroud coating

Details Abradable shroud coating Abradable shroud coating

1987-09-22

1989-09-19

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Between blade edge and static part

228120, 428117, F01D 1108

Patent

active

048676390

ABSTRACT:
Abradable coatings are applied to turbine or compressor shroud structures to facilitate reductions in blade tip-to-shroud clearances for improved engine performance or airfoil durability. Coating compositions include a chemically table, soft, burnishable ceramic material (such as CaF.sub.2 or BaF.sub.2) in a ceramic or metallic matrix or honeycomb structure.

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patent: 4639388 (1987-01-01), Ainsworth et al.
patent: 4669955 (1987-06-01), Pellow

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