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US 2010/0143745 A1Published application
NiCoCrl layer for forming dense and solid oxide layers and metallic layer system
OwnerWerner Stamminventor
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Abstract
NiCoCrAl layers used as anticorrosive layers characterized by additional corrosion stability enhancing agents that substantially improve the anticorrosive properties are provided. Corrosion stability is not only determined by the composition and the percentage of the main alloy elements of nickel, cobalt, chromium and aluminium, but also by the addition of corrosion stability enhancing agents, such yttrium, cerium, tantalum, niobium, silicon, titanium, zirconium, and hafnium.
Claims21
-30. (canceled)
A NiCoCrAl layer, comprising an element selected from the group consisting of
- cerium;
- tantalum;
- niobium;
- silicon;
- titanium;
- a rare earth element;
- zirconium;
- hafnium, and
- a combination thereof,
- wherein the layer is at least 1% by weight and at most 5% by weight, and
- wherein the element is used as a corrosion resistance enhancer.
8 more elements
A metallic layer system, comprising:
- an inner metallic layer;
- and
- an outer metallic layer, comprising:
- a NiCoCrAl layer, comprising an element selected from the group consisting of:
- cerium,
- tantalum,
- niobium,
- silicon,
- titanium,
- a rare earth element,
- zirconium,
- hafnium, and
- a combination thereof,
- wherein the layer is at least 1% by weight and at most 5% by weight, and
- wherein the element is used as a corrosion resistance enhancer.
12 more elements
Dependencies are inferred from the claim text.