Patent ID: 6887530
Filing Date: 2005-05-03
Classification: B22F,C22C,C23C,F01D,F05D,Y02T,Y10T

Abstract:
1. A method of providing a three-phase abradable seal on a substrate comprising applying an adherent coating having a thickness of up to 3 mm to the substrate by thermally spraying a composition thereon comprising 5 to 60 wt % total of a solid lubricant and 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, the balance a matrix-forming metal alloy, wherein the solid lubricant is hexagonal boron nitride and wherein the matrix-forming metal alloy is selected from the group consisting of alloys of Ni, Co, Fe and combinations thereof.