Thermal spray compositions for abradable seals
AssigneeSulzer Metco (Canada) Inc.
InventorsPetr Fiala, Anthony Peter Chilkowich, Karel Hajmrle
Life of this patent
Estimating the term…
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.
Claims19
A thermal spray composition comprising 5 to 60 wt % total of a solid lubricant and a ceramic, the balance a matrix-forming metal alloy wherein the solid lubricant is hexagonal boron nitride, the ceramic is at least one ceramic selected from the group consisting of albite, illite, mixtures thereof and alumina-silica-based ceramics in a ratio of 1:7 to 20:1 by weight of solid lubricant to ceramic, and the matrix-forming metal alloy is an alloy selected from the group consisting of alloys of Ni, Co, Fe and combinations thereof.
A thermal spray composition as claimed in claim 4, in which the ceramic includes at least one of albite and illite or mixture Thereof.
Dependencies are inferred from the claim text.