Thermal barrier coating system for superalloy components
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United States of America Patent
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May 7, 1996
Grant Date -
N/A
app pub date -
Apr 25, 1984
filing date -
Apr 25, 1984
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Abstract
An improvement in a thermal barrier coating for superalloy turbine engine components subjected to high operating temperatures, such as turbine airfoils, e.g., vanes and blades, is disclosed which eliminates the expensive MCrAlY oxidation resistant bond coating underlayer for a columnar grained ceramic thermal barrier coating. In accordance with my present invention, a relatively low cost thermal barrier coating system for superalloy turbine components is provided which utilizes a diffusion aluminide coating layer as the oxidation resistant bonding surface for the columnar grained ceramic insulating coating.
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