真空电子器件阴极焊接用PdNb合金钎焊料的研制
Research on PdNb Alloy Brazing Material Used for Cathode Welding of Vacuum Electron Devices
李银娥，马 光，孙晓亮，郑 晶
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作者单位：（西北有色金属研究院，陕西 西安 710016）
中文关键字：钯铌合金；钎料；焊接性；阴极
英文关键字：palladium-niobium alloy; brazing; welding process; cathode
中文摘要：对PdNb二元高温合金焊料进行了熔化温度的测量及焊接工艺性能试验，对其阴极焊接件在1000～1200 ℃的真空条件下的蒸发进行了测试。结果表明：该焊料能满足真空电子器件阴极的焊接温度要求；在母材W、Mo上的润湿、铺展性能非常好，能完全润湿母材，铺展面积是放置焊料面积的10～15倍，润湿角接近0°；阴极W/Mo焊接件在1000～1200 ℃的真空条件下蒸发很少，满足了生产工艺要求。
英文摘要：The palladium-niobium binary superalloy was studied though melt temperature measurements， brazing technology tests and evaporation experiments of cathode weldmen in vacuum condiction at 1000～1200℃. The results show that the selected palladium-niobium binary superalloy meets the brazing temperature requirements of vacuum electronic devices. The solder is completely wetting， spreading area is 10～15 times than the initial solder area and the wetting angle is 0°， the wettability and spreadability are very good on base metal W and Mo. Cathode W / Mo welding pieces have a very few evaporation in vacuum condiction at 1000～1200℃， which meets the requirements of the production process.