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:
Jun. 20, 1995
Filed:
Nov. 29, 1993
Satoshi Hirosawa, Ootsu, JP;
Takashi Ikegami, Ibaragi, JP;
Ken Makita, Osaka, JP;
Tsutomu Mashimo, Kumamoto, JP;
Sumitomo Special Metals Co., Ltd., Osaka, JP;
Abstract
A densified high performance rare earth-iron-nitrogen permanent magnet obtained from a powder of a Th.sub.2 Zn.sub.17 compound containing nitrogen at interlattice sites, without using autogeneous sintering and yet preventing decomposition and/or denitrification from occurring. The process for producing the same need not necessarily use a binder, and it comprises compaction molding, or charging while applying a magnetic field, a powder of a nitrogen intrusion T--R--N compound having a specified composition and a Th.sub.2 Zn.sub.17 crystal structure, and applying thereto shock compression at a drive pressure of from 10 to 25 GPa as reduced to an equivalent drive pressure in an iron capsule.