Iron-nitride magnet by nitriding a porous structure

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United States of America Patent

PATENT NO 12014853
APP PUB NO 20210202142A1
SERIAL NO

17058882

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Abstract

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In general, the disclosure is directed to bulk iron-nitride materials having a polycrystalline microstructure having pores including a plurality of crystallographic grains surrounded by grain boundaries, where at least one crystallographic grain includes an iron-nitride phase including any of a body centered cubic (bcc) structure, a body centered tetragonal (bct), and a martensite structure. The disclosure further describes techniques producing a bulk iron-nitride material having a polycrystalline microstructure, including: melting an iron source to obtain a molten iron source; fast belt casting the molten iron source to obtain a cast iron source; cooling and shaping the cast iron source to obtain a bulk iron-containing material having a body-centered cubic (bcc) structure; annealing the bulk iron-containing material at an austenite transformation temperature and subsequently cooling the bulk iron-containing material; and nitriding the bulk iron-containing material to obtain the bulk iron-nitride material.

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Patent Owner(s)

Patent OwnerAddress
REGENTS OF THE UNIVERSITY OF MINNESOTA600 MCNAMARA ALUMNI CENTER 200 OAK STREET SE MINNEAPOLIS MN 55455-2020

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Guo, Guannan Minneapolis, US 3 0
Liu, Jinming Minneapolis, US 42 58
Ma, Bin Roseville, US 334 7799
Wang, Jian-Ping Shoreview, US 94 795
Wu, Yiming Shoreview, US 35 184
Zhang, Fan Minneapolis, US 973 7171
Zhang, Xiaowei Minneapolis, US 201 429

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