| 摘要 |
PURPOSE:To obtain alloy powder and a magnet having excellent Curie temperature, corrosion-resisting property and coercive force by a method wherein a specific constitution is composed of at least either of Nd and Pr, at least one of Gd, Tb and Dy, at least one of Ti, Zr, Ha and the like, and C. CONSTITUTION:The title rare-earth alloy powder has the composition indicated by the formula I consisting of at least one type of R of Nd or Pr, at least one type of R' selected from Gd, Tb and Dy, at least one type of M selected from Ti, Zr, Hf, V, Cr, No, Mn, Cu, Al and Si, and the remaining part consisting of Co and inevitable impurities, and the above-mentioned alloy power has the fine crystal texture having average particle diameter of 300Angstrom or smaller. In other words, the uniaxial anisotropy of the material is increased by using two kinds of rare-earth elements of a light rare-earth element R and a heavy rare-earth element R', and the material having high coercive force can be obtained. Also, Co has excellent magnetic characteristics, especially it raises the Curie temperature, and besides, it has the working of improving corrosion-resisting property. As a result, a bonded magnet, having excellent Curie temperature, coercive force and corrosion-resisting property using rare-earth alloy powder, can be obtained at low cost. |
