采用电子探针微分析术研究了机械复合和冶金复合两种界面状态的Nb-Ti/Cu复合超导线,以及Nb-Ti/Cu,Ti/Cu和Nb/Cu偶的扩散反应过程.结果表明,原始组件的界面状态对Nb-Ti/Cu间金属间化合物的生成有明显的影响.机械复合组件较冶金复合组件能承受更高的热处理温度而不致生成金属间化合物.Ti与Cu之间反应生成化合物的次序与形态及NbTi与Cu之间不同.Ti/Cu间生成化合物的厚度y与时间t关系遵循y~(1.5-t)的规律.
Diffusion reactions of superconducting composite NbTi/Cu, diffusioncouple Ti/Cu and Nb/Cu have been studied by means of EPMA. The results indica-te that the initial interface state of the composite NbTi/Cu significantly affect theforming process of intermetallic compounds at the interface, In comparision with themetallurgical binding composite, the intermetallic compounds forms at a higher tem-perature in mechanical binding one. Therefore, the mechanical binding process isbeneficial to the production of NbTi/Cu superconducting composite. No intermetallic compounds have been observed in Nb/Cu system. The morphol-ogy of intermetallic phases and the sequence in which they form in Ti/Cu systemare somewhat different to that in NbTi/Cu. The relationship between the thicknessof compound layer and anealing time obeys the rule of y~(1.5)--t.
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