Patent ID: 9511572
Filing Date: 2016-12-06
CPC Classification: B32B,C22C,C23C,F01D,Y10T

Claim Text:
1. A coated substrate comprising: a substrate having a surface; a bond coat proximate to the substrate surface, wherein said bond coat comprises NiCoCrAlY and exhibits a duplex structure containing fine β-phase [(Co and/or Ni)Al] particles in a Ni solid solution matrix; and at least one interlayer disposed between the bond coat and a yttrium stabilized zirconia (YSZ) thermal barrier layer, wherein the interlayer comprises NiCoCrAlSi and exhibits a grain size of less than 100 nm as measured by x-ray diffraction, wherein said bond coat is susceptible to loss of Al at elevated temperature and formation of an aluminum oxide layer as between said bond coat and said yttrium stabilized zirconia thermal barrier layer and said interlayer slows down said loss of Al from said bond coat at elevated temperature.