Coating containing NiAl-β phase
AssigneeAlstom (Switzerland) Ltd
InventorsMohamed Nazmy, Hans Joachim Schmutzler
Life of this patent
Estimating the term…
Abstract
The invention relates to a coating which contains large volumetric fractions, preferably from 20 to 90% by volume, of NiAl-β phase in a γ matrix. It contains the following microalloying elements which increase the ductility of the coating (data in % by weight): 0.1-8 Fe and/or 0.1-8 Mo and/or 0.1-8 Ga, where the total Fe, Mo and Ga content is at most 10%. In addition, small amounts of Zr, C and/or B may be added to the alloy, strengthening the β/γ phase boundaries.
Claims21
A coating containing NiAl-β phase, with an NiAl-β content in the range from 20 to 90% by volume in a γ matrix, which contains Fe and optionally at least one of Mo and Ga as microalloying elements, in % by weight:
- 3-8 Fe, 0.1-8 Mo and 0.1-8 Ga, where the total Fe, Mo and Ga content is at most 10%.
Dependencies are inferred from the claim text.