Back to results
US 2021/0265111 A1Published application
Applied magnetic field synthesis and processing of iron nitride magnetic materials
AssigneeRegents of the University of Minnesota
InventorsJian-Ping WANG, YanFeng JIANG
Life of this patent
Estimating the term…
Abstract
Techniques are disclosed concerning applied magnetic field synthesis and processing of iron nitride magnetic materials. Some methods concern casting a material including iron in the presence of an applied magnetic field to form a workpiece including at least one iron-based phase domain including uniaxial magnetic anisotropy, wherein the applied magnetic field has a strength of at least about 0.01 Tesla (T). Also disclosed are workpieces made by such methods, apparatus for making such workpieces and bulk materials made by such methods.
Claims13
A workpiece comprising:
- at least one anisotropically-shaped iron-based grain, wherein the at least one anisotropically-shaped iron-based grain comprises an aspect ratio of between about 1.1 and about 50 wherein the at least one anisotropically-shaped iron-based grain comprises at least one α″-Fe16N2 phase domain, and wherein the aspect ratio is defined as the ratio of the length of a longest dimension to the length of a shortest dimension of the anisotropic grain, where the longest dimension and shortest dimension are substantially orthogonal, and wherein the workpiece comprises at least one dopant wherein the at least one dopant comprises at least one of Al, Mn, La, Cr, Co, Ti, Ni, Zn, Zr, Ca, or a rare earth metal.
Dependencies are inferred from the claim text.