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Solid State Grain Alignment Of Permanent Magets in Near-Final Shape

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
Magnet microstructure manipulation in the solid state by controlled application of a sufficient stress in a direction during high temperature annealing in a single-phase region of heat-treatable magnet alloys, e.g., alnico-type magnets is followed by magnetic annealing and draw annealing to improve coercivity and saturation magnetization properties. The solid-state process can be termed highly controlled abnormal grain growth (hereafter AGG) and will make aligned sintered anisotropic magnets that meet or exceed the magnetic properties of cast versions of the same alloy types.
Anderson, Iver E. (Ames, IA), White, Emma Marie Hamilton (Ames, IA), Kramer, Matthew J. (Ankeny, IA), Kassen, Aaron G. (Ames, IA), Dennis, Kevin W. (Ames, IA)
Iowa State University Research Foundation, Inc.
15/ 530,951
March 28, 2017
CONTRACTUAL ORIGIN OF THE INVENTION [0002] This invention was made with government support under Grant No. DE-AC02-07CH11358 awarded by the Department of Energy. The Government has certain rights in the invention.