Permanent magnet

Details Permanent magnet Permanent magnet

H - Electricity

01

F

H01F 1/08 (2006.01) C22C 1/04 (2006.01) C22C 38/04 (2006.01) H01F 1/055 (2006.01)

Patent

CA 2195945

A permanent magnet of a magnetically anisotropic Fe-Mn-R sinter comprising on the atomic percentage basis 5-35 % at least one rare earth element (R) selected among ytterbium, erbium, thulium and lutetium, 1-25 % manganese and the balance substantially consisting of iron, wherein part of iron has been replaced by at most 50 % (exclusive of 0 %), based on the whole structure, of cobalt. The magnet is inexpensive and has excellent temperature characteristics.

Un aimant permanent en un matériau fritté Fe-Mn-R magnétiquement anisotrope comprend, en atomes, 5-35 % d'au moins un élément des terres rares (R) choisi parmi l'ytterbium, l'erbium, le thulium et le lutétium, 1-25 % de manganèse, le solde étant essentiellement constitué de fer. Une partie du fer est remplacée par du cobalt, en une quantité pouvant aller jusqu'à 50 % de la composition totale, mais qui ne peut être nulle. L'aimant est bon marché et présente d'excellentes caractéristiques thermiques.

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