Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1997-04-14
1999-11-30
Zimmerman, John J.
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
428678, 428937, 428938, 427456, 4272557, 416241R, 416241B, F01D 528, C22C 1905, C23C 408, C23C 1416
Patent
active
059939800
ABSTRACT:
A protective coating for protecting a component from corrosion and oxidation at a high temperature and from excessive thermal stress, has a heat insulation layer including a ceramic material and an adhesion-promoting layer including a rhenium containing metal alloy. The metal alloy belongs to the alloys covered by the general term MCrAlY, where M represents cobalt and/or nickel and Y represents yttrium and/or at least one equivalent metal from the group including scandium and the rare earth elements. The protective coating is distinguished by high oxidation resistance and corrosion resistance of the alloy, by outstanding thermal fatigue properties and an effective and permanent bond between the alloy and the ceramic heat insulation layer. As a result of the heat insulation, the temperature at the outer surface of the protective coating can be considerably higher than with purely metallic protective coatings, without an increased thermal load being exerted on the component. The protective coating is therefore particularly suitable for a gas turbine component exposed to a hot combustion gas, for example a guide vane, a rotor blade or a heat shield.
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Czech Norbert
Schmitz Friedheim
Greenberg Laurence A.
Lerner Herbert L.
Siemens Aktiengesellschaft
Zimmerman John J.
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