| 摘要 |
<p>PURPOSE:To economically produce a hydrogen storage alloy enhanced in alloying rate. CONSTITUTION:This hydrogen storage alloy is produced by the following steps. Namely, (1) the powders M of >=2 different kinds of metals, e.g. Mg and Ni, giving a hydrogen storage alloy on alloying and a crushing ball B are charged into the mill pot 21 of a high-speed ball mill. (2) The mill pot is filled in with a nonoxidizing atmosphere. (3) The mill is operated under conditions where the resultant crushing acceleration ratio G shown by the following equation is controlled to >=30 and the ratio R of the rotating to revolving angular speeds to <=1.9 to exert an effective mechanical alloying action. The equation is expressed by G=amax/g=(omega1)<2>/2g(K+NX(1+R)<2> wherein G is the resultant crushing acceleration ratio, amax is the resultant crushing acceleration (m/S<2>), g is the gravitational acceleration m/S<2>, omega1 is the revolving angular speed (1/S), K is the diameter (m) of revolution, N is the inner diameter (m) of the mill pot, omega2 1/S is the relative angular speed of the rotation to revolution, and R=omega2/omega1.</p> |
