Rare earth element-metal-hydrogen-boron permanent magnet and...

H - Electricity – 01 – F

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H01F 1/057 (2006.01) C22C 32/00 (2006.01)

Patent

CA 2159463

A permanent magnet is provided which is comprised of, by atomic percent: 10-24 % R; 2-28 % boron, 0.1-18.12 % hydrogen; and balance being M. R is at least one element selected from La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y and Sc, and M is at least one metal selected from Fe, Co, Ni, Li, Be, Mg, Ae, Si, Ti, V, Cr, Mn, Cu, Zn, Ga, Ge, Zn, Nb, Mo, Ru, Rh, Pd, Ag, Sb, Te, Mf, Ta, W, Re, Os, Ir, Pt, Au, and Bi. A process for producing the rare earth element-metal-hydrogen boron magnets is also disclosed wherein the magnetic materials are treated in an atmosphere having partial pressures of hydrogen containing gas at temperatures below the phase transformation temperature of the rare earth element-metal hybrides prior to sintering.

L'invention se rapporte à un aimant permanent comprenant, en pourcentage atomique, entre 10 et 24 % de R; entre 2 et 28 % de bore, entre 0,1 et 18,12 % d'hydrogène; le reste étant M. R représente au moins un élément sélectionné parmi La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y et Sc, et M représente au moins un métal sélectionné parmi Fe, Co, Ni, Li, Be, Mg, Ae, Si, Ti, V, Cr, Mn, Cu, Zn, Ga, Ge, Zn, Nb, Mo, Ru, Rh, Pd, Ag, Sb, Te, Mf, Ta, W, Re, Os, Ir, Pt, Au, et Bi. L'invention se rapporte également à un procédé de production d'aimants comprenant, du bore, de l'hydrogène, du métal, des métaux, des terres rares, dans lequel les matériaux magnétiques sont traités dans une atmosphère présentant des pressions partielles de gaz contenant de l'hydrogène, à des températures inférieures à la température de transformation de phase des hybrides métalliques-métaux des terres rares avant l'étape de frittage.

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