| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for simply manufacturing an anisotropic exchange spring magnet, having superior magnet characteristics. SOLUTION: This manufacturing method of the anisotropic exchange spring magnet includes a step for grinding an rare earth magnet alloy, to size being smaller than that of a partial anisotropy region to obtain magnet powder, a step for forming the magnet power in a magnetic field to obtain a green compact, and a step for allowing the green compact to be subjected to discharge plasma sintering to obtain a bulk magnet. In an NbFeB-based rare earth magnet alloy, in which hard and soft magnetic phases are mixed, each size of the hard and soft magnetic phases is set to 80 nm or smaller, and at the same time, the size of the partial anisotropic region, where the direction of the axis of easy magnetization in the hard magnetic phase is equal is set to 0.1 μm or larger. |
