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US 12,624,428 B2Granted
Iron nitride compositions
AssigneeRegents of the University of Minnesota
InventorsJian-Ping Wang, YanFeng Jiang, Md Mehedi, Yiming Wu, Bin Ma, Jinming Liu, Delin Zhang
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Abstract
All example composition may include a plurality of grains including an iron nitride phase. The plurality of grains may have an average wain size between about 10 nm and about 200 nm. An example technique may include treating a composition including a plurality of grains including au iron-based phase to adjust an average grain size of the plurality of grains to between about 20 nm and about 100 ma. The example technique may include nitriding the plurality of grains to form or grow an iron nitride phase.
Claims5
An alloy composition comprising:
- a plurality of grains comprising an iron nitride phase,
- wherein the alloy composition has a coercivity of at least about 2000 Oe,
- wherein the average grain size is less than about 50 nm, and
- wherein an average grain boundary size of the plurality of grains is between about 2 nm and about 5 nm, and
- comprising a nonmagnetic element or compound configured to form domain wall pinning sites at the grain boundaries, wherein the nonmagnetic element or compound is selected from Cu, Zr, Ta, Ni, Ru, SiO2, Al2O3, or combinations thereof.
2 more elements
Dependencies are inferred from the claim text.