General Electric Company
Lanthanum molybdate abradable coatings, their methods of formation and use

Abstract:

A coated substrate is provided that can include a substrate defining a surface, and an abradable coating on the surface of the substrate. The abradable coating can comprise La.sub.2-xA.sub.xMo.sub.2-y-y'W.sub.yB.sub.y'O.sub.9-.delta. forming a crystalline structure, where A comprises Li, Na, K, Rb, Cs, Sc, Y, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Th, Be, Mg, Ca, Sr, Ba, Cu, Bi, Cd, Zn, Ag, Au, Pt, Ir, Rh, Ru, Pd, or combinations thereof; 0<x.ltoreq.about 0.2 (e.g., about 0.1.ltoreq.x.ltoreq.about 0.15); 0.ltoreq.y.ltoreq.about 1.5 (e.g., about 0.01.ltoreq.y.ltoreq.about 1.5); B comprises Ta, Nb, V, Fe, Cr, Mn, Co, Ni, Sn, Ga, Al, Re, In, S, or combinations thereof; 0.ltoreq.y'.ltoreq.about 0.2, wherein the sum of y and y' is about 0.01 to about 1.6; and 0.ltoreq..delta..ltoreq.about 0.2.