Patent ID: 6207295
Filing Date: 2001-03-27
Classification: C23C,F01D,F05C,F05D,Y02T,Y10T

Abstract:
A coated article comprising:a substrate of an alloy based on at least one element selected from the group consisting of Ni and Co;an inner environmental resistant coating portion including Al on the substrate; and,an outer heat energy reflecting and oxygen diffusion inhibiting coating portion, the outer coating portion:a. being multi-layered;b. comprising 6-48 stacked layers; and,c. having a total thickness in the range of about 2.5-25 microns;the outer coating portion comprising alternating layers of:a. at least one high index material selected from the group consisting of Ta.sub.2 O.sub.5, TiO.sub.2, HfO.sub.2, NbO, and Y.sub.2 O.sub.5 ; and,b. at least one low index material selected from the group consisting of SiO.sub.2 and Al.sub.2 O.sub.3.