A permanent magnet is provided which is comprised of, by
atomic percent:
10-24% R; 2-28% boron, 0.1-18.12% hydrogen; and balance
being M. R is at
least one element selected from La, Ce, Pr, Nd, Pm,
Sm, Eu, Gd, Tb, Dy,
Ho, Er, Tm, Yb, Lu, Y and Sc, and M is at least one
metal selected from
Fe, Co, Ni, Li, Be, Mg, As, Si, Ti, V, Cr, Mn, Cu,
Zn, Ga Ge, Zn, Nb, Mo,
Ru, Rh, Pd, Ag, Sb, Te, Hf, Ta, W, Re, Os, Ir,
Pt, Au, and Bi. A process
for producing the rare earth
element-metal-hydrogen boron magnets is also
disclosed wherein the
magnetic materials are treated in an atmosphere
having partial
pressures of hydrogen containing gas at temperatures below
the phase
transformation temperature of the rare earth element-metal
hydrides
prior to sintering. |