| 简介 |
PURPOSE : A raw material alloy for a nano-composite magnet, a raw material alloy powder for a nano-composite magnet, a method for preparing a raw material alloy, a method for preparing a nano-composite magnet powder, and a method for producing a nano-composite magnet are provided to increase an amount of raw material alloy to be processed by improving a composition thereof.
CONSTITUTION : A raw material alloy for a nano-composite magnet is represented by a general formula Fe100-x-yRxBy, Fe100-x-y-zRxByCoz, Fe100-x-y-uRxByMu or Fe100-x-y-z-u RxByCozMu. At this time, R is a rare-earth element including Pr and/or Nd of 90 atomic percent or more and lanthanoid and/or Y of the remaining atomic percent, M is at least one element selected from a group including Al, Si, Ti, V, Cr, Mn, Ni, Cu, Ga, Zr, Nb, Mo, Hf, Ta, W, Pt, Pb, Au and Ag, and molar fractions x, y, z and u meet 2<=x<=6, 16<=y<=20, 0.2<=z<=7, 0.01<=u<=7. The raw material alloy includes a metastable phase Z represented by at least one of Bragg reflection peaks observable by X-ray diffraction analysis. One or more peaks correspond to a lattice spacing of 0.179nm ±0.005nm. The intensity of the Bragg reflection peak represents 5 to 200 percent of maximum intensity of a halo pattern. The intensity of a Bragg reflection peak of body-centered Fe represents less than 5 percent of the maximum intensity of the halo pattern.
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