Abstract: An intermediate thermal expansion coefficient coating including an NiCoCrAly alloy. The coating contains nanoparticles of the alloy and alumina. A nanocomposite coating is placed on metals to protect them from high gas temperatures by providing thermal insulation. The nanocomposite coating includes a bond coating, an intermediate thermal expansion coefficient coating, and a ceramic top coat. The intermediate thermal expansion coefficient coating comprises a NiCoCrAly alloy and allumina nanoparticles and has a ceramic top coat which is based on zirconi or high purity alumina.

Abstract: A superalloy article which comprises a substrate comprised of a superalloy, a bond coat comprised of MCrAlY wherein M is a metal selected from the group consisting of cobalt, nickel and mixtures thereof applied onto at least a portion of the substrate and a ceramic top coat applied over at least a portion of the bond coat. The bond coat is exposed to a temperature of within the range of between about 1600-1800° F. subsequent to its application onto the substrate.

Abstract: A superalloy article which comprises a substrate comprised of a superalloy, a bond coat comprised of MCrAlY wherein M is a metal selected from the group consisting of cobalt, nickel and mixtures thereof applied onto at least a portion of the substrate and a ceramic top coat applied over at least a portion of the bond coat. The bond coat is exposed to a temperature of within the range of between about 1600-1800° F. subsequent to its application onto the substrate.