Thermal barrier coating having low thermal conductivity
AssigneeChromalloy Gas Turbine Corporation
InventorsYourong Liu, Paul Lawton
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Abstract
This invention provides a thermal barrier ceramic coating for application to a metallic article, with the ceramic coating having a formula of RexZr1-xOy wherein Re is a rare earth element selected from the group consisting of Ce, Pr, Nd, Pm, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb and Lu where O<X<0.5 and 1.75<Y<2. A preferred embodiment is wherein Re is Nd.
Claims43
A metallic article comprising a metallic substrate and a thermal barrier ceramic coating on its surface with the ceramic coating having a formula of RexZr1-xOy where Re is a rare earth element selected from the group consisting of Ce, Pr, Nd, Pm, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb and Lu and where 0<X<0.5 and 1.75<y<2.
A metallic article comprising a metallic substrate and a thermal barrier ceramic coating on its surface, the ceramic coating having a formula of NdxZr1-xOy wherein 0<X<0.5 and 1.75<Y<2
A method for applying a thermal barrier ceramic coating to a metallic article comprising:
- forming a ceramic having a formula RexZr1-xOy where Re is a rare earth element selected from the group consisting of Ce, Pr, Nd, Pm, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb and Lu and wherein O<X<0.5 and 1.75<Y<2 by doping oxides of Re into a zirconia oxide ceramic;
- and
- applying the ceramic as a coating onto the metallic article.
Method for applying a thermal barrier ceramic coating to a metallic article comprising:
- forming a ceramic having a formula NdxZr1-xOy, wherein O<X<0.5 and 1.75<Y<2 by doping Nd oxide into a Zr oxide ceramic;
- and
- applying the ceramic as a coating onto the metallic article.
Dependencies are inferred from the claim text.