Thermal spray compositions for abradable seals

Details Thermal spray compositions for abradable seals Thermal spray compositions for abradable seals

2007-02-20

2007-02-20

Lavilla, Michael E. (Department: 1775)

Coating processes

Spray coating utilizing flame or plasma heat

Metal or metal alloy coating

C427S448000, C427S449000, C427S421100, C427S427400, C427S427500, C427S422000

Reexamination Certificate

active

11116187

ABSTRACT:
A thermal spray composition and method of deposition for abradable seals for use in gas turbine engines, turbochargers and steam turbines. The thermal spray composition includes a solid lubricant and a ceramic preferably comprising 5 to 60 wt % total of the composition in a ratio of 1:7 to 20:1 of solid lubricant to ceramic, the balance a matrix-forming metal alloy selected from Ni, Co, Cu, Fe and Al and combinations and alloys thereof. The solid lubricant is at least one of hexagonal boron nitride, graphite, calcium fluoride, lithium fluoride, magnesium fluoride, barium fluoride, tungsten disulfide and molybdenum disulfide particles. The ceramic includes at least one of albite, illite, quartz and alumina-silica.

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