以Ti-Cu-Ag(68.8Ag-26.7Cu-4.5Ti,质量分数,%)为钎料,在895、900、905和910℃温度下,在0.67mPa真空环境中持续10 min,采用活泼金属钎焊技术钎焊氧化铝和石墨。在30~600℃对钎焊样品进行热循环并对其进行表征。X射线衍射结果表明,钛和碳之间的强烈反应同钛和氧化铝的一样。扫描电子显微分析和氦气密封性试验表明,初始样品和热循环钎焊样品没有出现裂缝或其它缺陷和气密性问题。实验得到了钎焊强度满意的接头。 Ti-Cu-Ag (68.8Ag-26.7Cu-4.5Ti, mass fraction,%) was used as a brazing filler metal and the microstructure was maintained at 895, 900, 905 and 910 ℃ for 10 min in a 0.67 mPa vacuum environment. Brazing techniques braze alumina and graphite. The brazed samples were thermally cycled at 30 ~ 600 ℃ and characterized. X-ray diffraction results show that the strong reaction between titanium and carbon is the same as titanium and aluminum oxide. Scanning electron microscopy and helium sealing tests showed no cracking or other defects and gas tightness problems with the initial sample and with the thermal cycled braze sample. Experiments have been satisfied with the brazing strength of the connector.