发明名称 |
Process for crushing hafnium crystal bar |
摘要 |
A process for crushing a hafnium (Hf) crystal bar comprises the steps of maintaining the Hf crystal bar at an extremely low temperature by holding the crystal bar in contact with a cryogenic refrigerant and crushing the crystal bar at the extremely low temperature by clamping and compressing the crystal bar between nickel (Ni)-base superalloy members. An apparatus for crushing the Hf crystal bar comprises a Ni-base superalloy-made container for containing the cryogenic refrigerant, the container having a bottom portion capable of being selectively opened and closed, a heat insulator for covering the container filled with the cryogenic refrigerant so as to maintain the interior of the container at the extremely low temperature, Ni-base superalloy-made pressing terminals for clamping the Hf crystal bar therebetween in the container, and a pressing device for exerting pressure on the pressing terminals so as to compress and crush the Hf crystal bar.
|
申请公布号 |
US4951881(A) |
申请公布日期 |
1990.08.28 |
申请号 |
US19890378337 |
申请日期 |
1989.07.11 |
申请人 |
ISHIKAWAJIMA-HARIMA HEAVY INDUSTRIES CO., LTD. |
发明人 |
SHIODA, TAKUO;YAMADA, JIRO |
分类号 |
C30B13/28;B22F9/04;C30B13/30;C30B29/42 |
主分类号 |
C30B13/28 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|