초록 ▼

A device (10) comprising a substrate (22) having a deposited ceramic thermal barrier coating characterized by a microstructure having gaps (28) where the thermal barrier coating comprises a first thermal barrier layer (40), and a second thermal barrier layer (30) with a pyrochlore crystal structure

A device (10) comprising a substrate (22) having a deposited ceramic thermal barrier coating characterized by a microstructure having gaps (28) where the thermal barrier coating comprises a first thermal barrier layer (40), and a second thermal barrier layer (30) with a pyrochlore crystal structure having a chemical formula of An+2-xBm+2+xO7-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, where n and m are the valence of A and B respectively, and for -0.5.ltoreq.x.ltoreq.0.5, [EQU1]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.

대표청구항 ▼

1. 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; a first ceramic thermal barrier layer; and a second ceramic thermal barrier layer comprising a An+2-xBm+2+xO7-y

1. 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; a first ceramic thermal barrier layer; and a second ceramic thermal barrier layer comprising a An+2-xBm+2+xO7-y chemical formula, where A is selected from the group 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 consisting of Zr, Hf, Ti and mixtures thereof, where n and m are the valence of A and B respectively, and where 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.