Rare earth magnet having excellent corrosion resistance

Details Rare earth magnet having excellent corrosion resistance Rare earth magnet having excellent corrosion resistance

H - Electricity

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H01F 1/04 (2006.01) H01F 1/057 (2006.01) H01F 1/06 (2006.01) H01F 1/08 (2006.01)

Patent

CA 1336866

An (Fe, Co)-B-R tetragonal type magnet having a high corrosion resistance, which has a boundary phase stabilized by Co and Al against corrosion, and which consists essentially of: 0.2 - 3.0 at% Dy and 12 - 17 at% of the sum of Nd and Dy; 5 - 10 at% B; 0.5 - 13 at% Co; 0.5 - 4 at% Al; and the balance being at least 65 at% Fe. 0.1 - 1.0 at% of Ti and/or Nb may be present. Alloy powders therefor can be also stabilized.

543678

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