Patent ID: 6258467
Filing Date: 2001-07-10
Classification: C04B,C23C,Y02T,Y10T

Abstract:
A device operating over a range of temperatures and having a deposited thermal barrier coating on at least a portion of its surface, the device comprising:a substrate with a base coat; and thena deposited ceramic thermal barrier layer, said ceramic thermal barrier layer consisting essentially of a pyrochlore crystal structure having a chemical formula consisting essentially of A.sup.n+.sub.2-x B.sup.m+.sub.2+x O.sub.7-y where A is selected from the group of elements consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and mixtures thereof; where B is selected from the group of elements consisting of Zr, Hf, Ti and mixtures thereof; n and m are the valence of A and B respectively; and for -0.5.ltoreq.x.ltoreq.0.5, ##EQU8##and excluding the following combinations for x=0, y=0:A=La and B=Zr; A=La and B=Hf; A=Gd and B=Hf; and A=Yb and B=Ti.