The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 2022
Filed:
Aug. 20, 2018
Applicant:
Northeastern University, Boston, MA (US);
Inventors:
Laura H. Lewis, Boston, MA (US);
Ian J. McDonald, Weatherly, PA (US);
Sahar Keshavarz, Hillsboro, OR (US);
R. William McCallum, Santa Fe, NM (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 8/12 (2006.01); H01F 1/147 (2006.01); H01F 41/00 (2006.01); C21D 6/00 (2006.01); C22C 33/04 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01);
U.S. Cl.
CPC ...
H01F 41/00 (2013.01); C21D 6/001 (2013.01); C21D 8/1233 (2013.01); C22C 33/04 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); H01F 1/14708 (2013.01); C22C 2202/02 (2013.01);
Abstract
The invention provides method for making high coercivity magnetic materials based on FeNi alloys having a L1phase structure, tetratenite, and provides a system for accelerating production of these materials. The FeNi alloy is made by preparing a melt comprising Fe, Ni, and optionally one or more elements selected from the group consisting of Ti, V, Al, B, C, Mo, Ir, and Nb; cooling the melt and applying extensional stress and a magnetic field. This is followed by heating and cooling to form the L10 structure.