Nano-phase separating ni powder and the methodology to identify them
AssigneeMassachusetts Institute of Technology
InventorsChristopher A. Schuh, Yannick Naunheim
Life of this patent
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Abstract
A method of designing a metal alloy powder having a miscibility gap at low temperature is disclosed. The method includes identifying a first metal element and a second metal to form a metal alloy. selecting a third metal having a miscibility gap with the metal alloy. and mechanically alloying the third metal and the metal alloy to form a metal alloy powder having a nanoscale grain size. The metal alloy powder can be engineered to have a phase separation temperature at which diffusion of the third metal occurs to phase separate as a nanoscale phase. The nanoscale phase can redissolve at a transition temperature higher than the phase separation temperature.
Claims23
A method of designing a metal alloy powder having a miscibility gap at low temperature comprising:
- identifying a first metal element and a second metal to form a metal alloy;
- selecting a third metal having a miscibility gap with the metal alloy;
- and
- mechanically alloying the third metal and the metal alloy to form a metal alloy powder having a nanoscale grain size.
19-20. (canceled)
A method of nano-phase separation sintering of a powder comprising:
- providing a fine grained powder including a first metal element and a second metal forming a metal alloy and a third metal having a miscibility gap with the metal alloy;
- and
- sintering the fine grained powder to form a sintered product.
22-28. (canceled)
A metal alloy powder for sintering comprising:
- a mechanically alloyed powder including a first metal element and a second metal forming a metal alloy and a third metal having a miscibility gap with the metal alloy.
30-36. (canceled)
Dependencies are inferred from the claim text.