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US 10,563,291 B2Granted
Method of forming a sintered nickel-titanium-rare earth (Ni—Ti—Re) alloy
AssigneeUniversity of Limerick
InventorsSyed Ansar Md. Tofail, James Butler
Life of this patent
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Abstract
A method of forming a sintered nickel-titanium-rare earth (Ni—Ti-RE) alloy includes adding one or more powders comprising Ni, Ti, and a rare earth constituent to a powder consolidation unit comprising an electrically conductive die and punch connectable to a power supply. The one or more powders are heated at a ramp rate of about 35° C./min or less to a sintering temperature, and pressure is applied to the powders at the sintering temperature, thereby forming a sintered Ni—Ti-RE alloy.
Claims17
A sintered nickel-titanium-rare earth (Ni—Ti-RE) alloy comprising:
- Ni at a concentration of from 35 at. % to 65 at. %;
- Ti at a concentration of from 35 at. % to 65 at. %;
- and
- a rare earth (RE) constituent at a concentration of from 1.5 at. % to about 15 at. %,
- wherein the sintered Ni—Ti-RE alloy includes a matrix phase and a second phase, the second phase comprising discrete regions in the matrix phase and including a RE element, and
- wherein the sintered Ni—Ti-RE alloy is superelastic at body temperature.
3 more elements
Dependencies are inferred from the claim text.