Process for producing particles from hafnium and apparatus therefor.

摘要

A process for crushing a hafnium (Hf) crystal bar comprising the steps of maintaining the Hf crystal bar (7) at an extremely low temperature by holding the crystal bar (7) in contact with a cryogenic refrigerant (2) and crushing the crystal bar (7) at the extremely low temperature by clamping and compressing the crystal bar (7) between nickel (Ni)-base superalloy members. An apparatus for crushing the Hf crystal bar comprising a Ni-base superalloy-made container (3) for containing the cryogenic refrigerant (2), the container (3) having a bottom portion (4b) adapted to be selectively opened and closed, a heat insulator (5) for covering the container (3) filled with the cryogenic refrigerant (2) so as to maintain the interior of the container (3) at the extremely low temperature, Ni-base superalloy-made pressing terminals (8) for clamping the Hf crystal bar (7) therebetween in the container (3), and pressing device (9) for exerting pressure on the pressing terminals (8) so as to compress and crush the Hf crystal bar (7).