高纯钨单晶坯料预处理工艺研究

Preparatory Proceeding for Blank of Tungsten Single Crystals with High Purity

探讨了三种预处理工艺 ,讨论了不同工艺方法对熔炼稳定性、排除间隙杂质的作用的影响。采用高纯仲钨酸铵 (APT)经还原、高温烧结、电子束熔炼预处理工艺 ,可有效降低间隙杂质元素含量 ,保证电子束悬浮区域熔炼过程的稳定性 ,制备出材质优良。

Three preprocessing technologies for tungsten single crystal were studied. The testing results indicate that optimum tungsten single crystals can be obtained as follow technology: reduction of high purity APT,high temperature sintering, electron beam melting technique.