| 摘要 |
<p>A rare earth magnet alloy ingot having a composition of RE (RE is at least one metallic element selected from lanthanoids, including Y (i.e., Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) in an amount of 27 to 34 mass %; B (boron) in an amount of 0.7 to 1.4 mass %; and TM as a balance (TM represents a metal comprising a transition metal, including Fe, as an essential element), has the quality thereof determined by holding the ingot in a reduced-pressure atmosphere, subsequently placing the ingot in a hydrogen atmosphere, and determining a hydrogen absorption behavior of the ingot while the ingot is held in the hydrogen atmosphere. The hydrogen absorption behavior is determined by measuring a time-elapsed change in an amount of hydrogen absorbed in the ingot from a time the ingot is place in the hydrogen atmosphere.</p> |
