Abstract: The invention describes a method of manufacturing a magnet on the basis of Re.sub.2 Fe.sub.14 B. To this end, a shaped body of the said composition is sintered by means of induction heating to a density exceeding 95% of the theoretical maximum density. The method according to the invention enables the manufacture of magnets having excellent properties in a very short time, these properties being: a high energy product, a large remanence, a high density, a large intrinsic coercive force and a small particle size.

Abstract: In a known method of manufacturing a sintered rare earth transition metal and boron magnet body, e.g. of Nd--Fe--B, the cast alloy is comminuted by hydrogen decrepitation in an atmosphere of pure hydrogen before further comminution, pressing in a magnetic alignment field, sintering and magnetization. The use of pure hydrogen introduces a serious risk of explosion. In the improved method the hydrogen is provided mixed with a chemically non-reactive gas, suitably nitrogen, suitably in a proportion in the range 5 percent to 30 percent by volume of hydrogen, to form an explosion suppressant atmosphere in the decrepitation vessel 1. Sole FIGURE.