A composite thermal barrier coating for a substrate has a first layer including a first ceramic material and a second layer including a second ceramic material impregnated with a glass, the glass being a ternary eutectic. The glass may consist of about 14.6 weight percent Al.sub.2 O.sub.3, about 23.3...http://www.google.com/patents/US5080977?utm_source=gb-gplus-sharePatent US5080977 - Composite thermal barrier coating
