IRON-RICH PERMANENT MAGNET

Number of patents in Portfolio can not be more than 2000

United States of America

APP PUB NO 20200027654A1
SERIAL NO

16423516

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Abstract

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The disclosure is directed to an iron-nitride material having a polycrystalline microstructure including a plurality of elongated crystallographic grains with grain boundaries, the iron-nitride material including at least one of an α″-Fe16N2 phase and a body-center-tetragonal (bct) phase comprising Fe and N. The disclosure is also directed a method producing an iron-nitride material. The method includes some combinations of preparing a raw material comprising iron, carrying out a microstructure build-up by annealing the prepared raw material at an elevated temperature and subsequently quenching the prepared raw material to produce a microstructure build-up material, annealing the microstructure build-up material, reducing the microstructure build-up material in a hydrogen environment, nitriding the reduced material to produce a nitrided material and subsequently quenching the nitrided material to a martensitic transformation temperature, stress annealing the nitrided material, and magnetic field annealing the stress-annealed material.

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International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
JIANG, YanFeng Minneapolis, US 27 79
LIU, Jinming Minneapolis, US 10 13
MA, Bin Roseville, US 219 3346
MEHEDI, Md Minneapolis, US 1 0
WANG, Jian-Ping Shoreview, US 61 287
ZHANG, Delin Minneapolis, US 4 0
ZHANG, Fan Minneapolis, US 589 3011

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