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:
Jan. 17, 2017
Filed:
Mar. 06, 2013
GM Global Technology Operations Llc, Detroit, MI (US);
Chen Zhou, Warren, MI (US);
Frederick E. Pinkerton, Shelby Township, MI (US);
Jan F. Herbst, Grosse Pointe Woods, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
New magnetic materials containing cerium, iron, and small additions of a third element are disclosed. These materials comprise compounds Ce(FeM) where x=1-4, having the ThMntetragonal crystal structure (space group I4/mmm, #139). Compounds with M=B, Al, Si, P, S, Sc, Co, Ni, Zn, Ga, Ge, Zr, Nb, Hf, Ta, and W are identified theoretically, and one class of compounds based on M=Si has been synthesized. The Si cognates are characterized by large magnetic moments (4πMgreater than 1.27 Tesla) and high Curie temperatures (264≦T≦305° C.). The Ce(FeM) compound may contain one or more of Ti, V, Cr, and Mo in combination with an M element. Further enhancement in Tis obtained by nitriding the Ce compounds through heat treatment in Ngas while retaining the ThMntetragonal crystal structure; for example CeFeSiNhas T=426° C.