Metal treatment – Stock – Magnetic
Patent
1990-08-09
1992-09-15
Wyszomerski, George
Metal treatment
Stock
Magnetic
420 83, H01F 1053
Patent
active
051474735
ABSTRACT:
A permanent magnet made of an R-Fe-B-C or R-Fe-Co-B-C based alloy (where R is at least one rare-earth element) consisting of its individual magnetic crystal grains that are covered with an oxidation-resistant protective film is promising as a practicable next-generation magnet because of its having not only excellent magnetic properties inclusive of magnetic force that surpasses Sm-Co based magnets but also such highly improved oxidation resistance that may withstand use in practical applications for a prolonged time period without being coated on its outermost exposed surface with an oxidation-resistant protective film. Said protective film surrounding the individual magnetic crystal grains contains at least one, preferably substantially all, of the alloying elements of which said magnetic crystal grains are made, with 0.05-16 wt. %, preferably 0.1-16 wt. % of said protective film being composed of C.
REFERENCES:
patent: 4597938 (1986-07-01), Matsuura et al.
patent: 4770723 (1988-09-01), Sagawa et al.
patent: 4792368 (1988-12-01), Sagawa et al.
patent: 4801340 (1989-01-01), Inoue et al.
patent: 5022939 (1991-06-01), Yajima et al.
patent: 5049208 (1991-09-01), Yajima et al.
Hisano Seiichi
Isoyama Seiji
Sato Yuichi
Senda Masayasu
Ueda Toshio
Dowa Mining Co. Ltd.
Wyszomerski George
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