Process for producing magnets having improved corrosion resistan

Details Process for producing magnets having improved corrosion resistan Process for producing magnets having improved corrosion resistan

1986-01-13

1989-06-06

Silverberg, Sam

Coating processes

Magnetic base or coating

20419231, 2041922, 20419211, 148300, 148302, 148101, B05D 512

Patent

active

048371149

ABSTRACT:
Fe-B-R type permanent magnet is produced by: forming an anticorrosive coating film layer on a Fe-B-R base permanent magnet material body by means of vapor deposition to thereby improve the corrosion resistance thereof.
The anticorrosive thin film is formed of metal, oxides, nitrides, carbides, borides, silicides, composite compositions thereof, or a mixture thereof. Additionally blasting, shot peening, heat treatment for forming an interdiffusion layer, and/or resin impregnation may be applied.

REFERENCES:
patent: 4253886 (1981-03-01), Tamai
patent: 4418473 (1983-12-01), Burkart
83822g Chem. Abstract, vol. 83, 1975.
IBM Tech. Bulletin, vol. 21, No. 9, 2-79.
Iron-Based Rare-Earth Magnets by K. S. V. L. Narasimhan J. Appl. Phys. 57(1), Apr. 15, 1985, pp. 4081-4085.
Patents Abstracts of Japan, vol. 5, No. 149 (E-75) [821], Sep. 19th 1981; & JP-A-56 81 908 (Suwa Seikosha K.K.) 04-07-1981.
Patents Abstracts of Japan, vol. 6, No. 144 (E-122) [1022], Aug. 3rd 1982; & JP-A-57 66 604 (Tokyo Shibaura Denki K.K.) 22-04-1982.

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