Stabilized zirconia thermal barrier coating with hafnia
OwnerKenneth S. Murphyinventor
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Abstract
A ceramic thermal barrier coating on a substrate wherein the coating comprises a stabilized zirconia coating including yttria and hafnia wherein the hafnia is present in an amount of at least about 15 weight % to substantially reduce thermal conductivity of the thermal barrier coating.
Claims19
A ceramic thermal barrier coating wherein at least a portion of the coating comprises a stabilized zirconia coating including hafnia in an amount effective to reduce thermal conductivity of the thermal barrier coating as compared to a similar coating having an impurity amount of hafnia.
An article comprising a metallic substrate and a ceramic coating on a surface of said substrate, said coating having at least a portion comprising a stabilized zirconia coating including hafnia in an amount effective to reduce thermal conductivity of the thermal barrier coating as compared to a similar coating having an impurity amount of hafnia.
A method of protecting a surface of a metallic substrate, comprising:
- depositing a coating comprising zirconia, yttria and hafnia wherein the hafnia is present in the coating in an amount effective to reduce thermal conductivity of the coating deposited on the substrate as compared to a similar coating having an impurity amount of hafnia.
Dependencies are inferred from the claim text.