Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1992-12-16
1994-11-01
Walsh, Donald P.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
428552, 427127, B22F 702, B22F 704
Patent
active
053606744
ABSTRACT:
A permanent magnet formed by a permanent magnet alloy of R--T--B system chiefly comprising a transition metal T, a rare earth element R including yttrium and boron B, and coated with a protective plating layer of Ni or an Ni alloy, wherein said protective plating layer is 30 .mu.m or less in thickness, and the inter-cell pitch in the surface of said protective plating layer is 14 .mu.m or more.
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patent: 4935080 (1990-01-01), Hassell et al.
patent: 4959273 (1990-09-01), Hamamura et al.
patent: 5154987 (1992-10-01), Nakayama et al.
patent: 5273782 (1993-12-01), Sagawa et al.
Ken Ohashi et al, "Study of Anticorrosive Treatments of Nd-Fe-B Magnets," Denki Gakkai Magunetikksu Kenkyukui Shiryo vol. MAG-19 No. 250-257 pp. 7-80 Nov. 8, 1991.
Eguchi Kiyoshi
Kawai Hideki
Kojo Katsuhiko
Ogawa Yoshiko
Chi Anthony R.
Hitachi Metals Ltd.
Walsh Donald P.
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