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US 2025/0144707 A1Published application
Degassing of nano-phase separating powders in a hydrogen containing atmosphere
AssigneeMassachusetts Institute of Technology
InventorsChristopher A. Schuh, Yannick Naunheim
Life of this patent
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Abstract
Removal of gas-evolving species from powders can be achieved before sintering occurs, reducing or eliminating gas evolution in a dense body that can lead to swelling, or lowering of density.
Claims23
A method of reducing gas production during metal alloy powder sintering comprising:
- providing a mechanically alloyed metal alloy powder;
- annealing the metal alloy powder at an annealing temperature below a sintering temperature, the annealing of the metal alloy powder being in an atmosphere including hydrogen or the metal alloy powder including an oxygen getter, or both;
- and
- sintering the metal alloy powder at a sintering temperature to reduced gas production during the sintering.
1 more element
19-22. (canceled)
A metal alloy powder for sintering comprising:
- a mechanically alloyed powder having a reduced amount of gas-evolving species compared to the amount of gas-evolving species in the mechanically alloyed powder prior to annealing in a hydrogen atmosphere.
24-28. (canceled)
A method of forming a sintered alloy, comprising:
- annealing a nano-phase separating metal alloy powder in the presence of hydrogen;
- and
- sintering the nano-phase separating metal alloy powder to form a sintered alloy product including nickel and having a relative density of at least 80%.
30-32. (canceled)
Dependencies are inferred from the claim text.