Patent ID: 6607789
Filing Date: 2003-08-19
Classification: C23C,Y10T

Abstract:
A process for forming a thermal barrier coating system on a surface of a superalloy component, the process comprising the steps of:forming a &bgr;-NiAl bond coat over the superalloy by first applying a sublayer of dense &bgr;-NiAl material having a smooth surface finish of 125 micro inches Ra and smoother, then applying an outer layer of less dense &bgr;-NiAl material having a rough surface finish of no smoother than about 400 micro inches Ra over the &bgr;-NiAl sublayer, the &bgr;-NiAl bond coat having an overall thickness of at least one mil; then thermally spraying a ceramic topcoat over the &bgr;-NiAl bond coat.