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US 8,784,944 B2Granted
Plasma-spray powder manufacture technique
AssigneeUnited Technologies Corporation
InventorsKevin W. Schlichting, Paul H. Zajchowski
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Abstract
A ceramic thermal barrier coating having improved erosion resistance includes a metallic layer and a ceramic layer positioned on the metallic layer. The ceramic layer includes a first powder, a second powder, and a third powder. The first powder and the second powder are alloyed together prior to being mixed with the third powder.
Claims9
A method of applying an erosion resistant coating onto a component, the method comprising:
- applying a bond coat to the surface of a component;
- melting titanium oxide ceramic powder and zirconium oxide ceramic powder at a temperature higher than the melting points of both ceramic powders to form a first homogeneous ceramic alloy melt consisting of between about 40 mol % and about 95 mol % titanium oxide and the balance zirconium oxide;
- cooling the first homogeneous alloy melt to form a first homogeneous solid ceramic alloy;
- creating a first homogeneous ceramic alloy powder from the first solid homogeneous ceramic alloy;
- mixing the first homogeneous ceramic alloy powder with a second ceramic powder to form a final ceramic powder mixture;
- and
- plasma spraying the final ceramic powder mixture onto the bond coat.
4 more elements
Dependencies are inferred from the claim text.