EVAPORATION MATERIAL AND METHOD FOR PRODUCING EVAPORATION MATERIAL

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A thin plate-like evaporation material which can be produced at low cost with high productivity and can be used for the purpose of improving the coercive force of a neodymium iron boron sintered magnet by heating the magnet in a vacuum or a reduced-pressure inert gas atmosphere while evaporating Dy.  An evaporation material (1) comprises a fire-retardant metal core member (1a) having many through holes, and a rare earth metal or an alloy of a rare earth metal is melted and bonded onto the member (1a) and solidified thereon.  In this connection, the bonding is carried out by immersing the core member into a melt of the rare earth metal or the alloy of a rare earth metal and pulling the core member out of the melt.