| 摘要 |
PURPOSE:To remove the formation of a nonmagnetic phase unnecessary for a permanent magnet, and to obtain a sufficient lubrication effect by using the impalpable powder of a B1-mFem(0<=m<=0.6) alloy as a lubricant. CONSTITUTION:An alloy having the composition of R(Fe1-x-y-zCoxByMz)A is dissolved and pulverized, and boron B is diffused and reacted, thus acquiring a permanent magnet employing a compound having a tetragonal system crystal structure as a main phase. Where R represents single Nd or one kind or combi nation of two kinds or more of rare earth elements centering Nd and Pr, M represents one kind or combination of two kinds or more of Al, U, P, W, Ti, Ni, Nb, Cr, Mo, Si, and 0<=x<=0.55, 0<=y<=0.02, 0<=z<=0.04, 3<=A<=7.5 hold. The finely-ground powder and pulverized B1-mFem (0<=m<=0.6) alloy are mixed at that time, and molded in a magnetic field, and B is reacted and diffused and the whole is baked. Accordingly, the formation of a nonmagnetic phase is re moved, and a sufficient lubrication effect is acquired. |
