J. Mater. Sci. Technol. ›› 2003, Vol. 19 ›› Issue (06): 571-575.

• 论文 • 上一篇    下一篇

Critical and Impeding Pressures of Al Evaporation during ISM Processing of NiAl

Guizhong LIU, Jingjie GUO, Yanqing SU, Jingzhe GUO, Jun JIA, Hengzhi FU   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2003-11-28 发布日期:2009-10-10

Critical and Impeding Pressures of Al Evaporation during ISM Processing of NiAl

Guizhong LIU, Jingjie GUO, Yanqing SU, Jingzhe GUO, Jun JIA, Hengzhi FU   

  1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2003-11-28 Published:2009-10-10
  • Contact: Jingjie GUO

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Abstract: In this paper, the critical pressure pcrit and impeding pressure pimpe of the elemental evaporation were defined and studied based on the calculation of the relationship between the evaporation loss rate Nm and the chamber pressure p during melting of NiAl alloys. When the chamber pressure is lower than pcrit or higher than pimpe, Nm tends to be the maximum or minimum value and remains almost unchanged. However, declines sharply with the increase of the chamber pressure when pcrit

Key words: ISM process, Al evaporation, Critical pressure, Impeding pressure