Preservation of strain in iron nitride magnet
Abstract
A permanent magnet may include a Fe16N2 phase in a strained state. In some examples, strain may be preserved within the permanent magnet by a technique that includes etching an iron nitride-containing workpiece including Fe16N2 to introduce texture, straining the workpiece, and annealing the workpiece. In some examples, strain may be preserved within the permanent magnet by a technique that includes applying at a first temperature a layer of material to an iron nitride-containing workpiece including Fe16N2, and bringing the layer of material and the iron nitride-containing workpiece to a second temperature, where the material has a different coefficient of thermal expansion than the iron nitride-containing workpiece. A permanent magnet including an Fe16N2 phase with preserved strain also is disclosed.
- Inventors:
- Issue Date:
- Research Org.:
- Univ. of Minnesota, Minneapolis, MN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1892511
- Patent Number(s):
- 11217370
- Application Number:
- 15/546,387
- Assignee:
- Regents of the University of Minnesota (Minneapolis, MN)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL
- DOE Contract Number:
- AR0000199
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 01/22/2016
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Wang, Jian-Ping, and Jiang, YanFeng. Preservation of strain in iron nitride magnet. United States: N. p., 2022.
Web.
Wang, Jian-Ping, & Jiang, YanFeng. Preservation of strain in iron nitride magnet. United States.
Wang, Jian-Ping, and Jiang, YanFeng. Tue .
"Preservation of strain in iron nitride magnet". United States. https://www.osti.gov/servlets/purl/1892511.
@article{osti_1892511,
title = {Preservation of strain in iron nitride magnet},
author = {Wang, Jian-Ping and Jiang, YanFeng},
abstractNote = {A permanent magnet may include a Fe16N2 phase in a strained state. In some examples, strain may be preserved within the permanent magnet by a technique that includes etching an iron nitride-containing workpiece including Fe16N2 to introduce texture, straining the workpiece, and annealing the workpiece. In some examples, strain may be preserved within the permanent magnet by a technique that includes applying at a first temperature a layer of material to an iron nitride-containing workpiece including Fe16N2, and bringing the layer of material and the iron nitride-containing workpiece to a second temperature, where the material has a different coefficient of thermal expansion than the iron nitride-containing workpiece. A permanent magnet including an Fe16N2 phase with preserved strain also is disclosed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2022},
month = {1}
}
Works referenced in this record:
Iron Nitride Powder, Method of Manufacturing the Same, and Magnetic Recording Medium
patent-application, April 2009
- Masaki, Kouichi
- US Patent Application 12/240483; 20090087688
Iron nitride permanent magnet and technique for forming iron nitride permanent magnet
patent, July 2017
- Wang, Jian-Ping; Jiang, Yanfeng
- US Patent Document 9,715,957
The effect of strain induced by Ag underlayer on saturation magnetization of partially ordered Fe 16 N 2 thin films
journal, December 2013
- Yang, Meiyin; Allard, Lawrence F.; Ji, Nian
- Applied Physics Letters, Vol. 103, Issue 24
Magnetic material including α″-Fe16(NxZ1-x)2 or a mixture of α″-Fe16Z2 and α″-Fe16N2, where Z includes at least one of C, B, or O
patent, September 2018
- Wang, Jian-Ping; Jiang, Yanfeng; Mehedi, Md Aminul
- US Patent Document 10,072,356
Production Method for Nanocomposite Magnet
patent-application, April 2010
- Sskuma, Noritsugu; Shoji, Tetsuya
- US Patent Application 12/513245; 20100104767