| 摘要 |
PURPOSE:To form substantially all the assemblages of the cooled and captured ultrafine particles to fine alloy particles by preparing a metallic material having the lower vapor pressure as a molten metal in an evaporating state into a vessel and supplying continuously the other metallic material thereto. CONSTITUTION:A metallic ingot 2 having the lower pressure is prepd. in a crucible 2 provided in a treating vessel 1. An induction heating coil 5a is activated to heat and melt the metallic ingot (a) in the crucible 2 until said ingot evaporates. The other metal (b) having the higher vapor pressure is continuously supplied in the form of a bar, pellet, etc. through a metallic material supply port 10 into the molten metal (a). The outside circumference of the metal (b) is enclosed with the metal (a) and is supplied in the form of a composite metallic material 16 in this case. When the tip end of the material 16 is dipped in the molten metal, the enveloping metal (a) melts and the metal (b) of the core melts and evaporates. The vapors of both metals (a), (b) collide and fuse against and to each other thus forming ultrafine alloy particles. The formed fine particles are cooled by a convectional inert gas during the ascending thereof and are grown to prescribed particles which are then stuck to the cooled sticking plate 6 in a capturing pipe 4. The particles are recovered in a receiving tray 12.
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