DIFFUSION REACTIONS BETWEEN Cu AND NbTi

Acta Metall Sin

1988, Vol. 24

Issue (4): 335-341 DOI:

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DIFFUSION REACTIONS BETWEEN Cu AND NbTi

XU Leying;WANG Wenbin;ZHUANG Yuzhi Institute of Metal Research; Academia Sinica; Shenyang

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XU Leying;WANG Wenbin;ZHUANG Yuzhi Institute of Metal Research; Academia Sinica; Shenyang. DIFFUSION REACTIONS BETWEEN Cu AND NbTi. Acta Metall Sin, 1988, 24(4): 335-341.

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Abstract 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.

Key words: copper NbTi alloy diffusion couple superconductor diffusion reaction

Received: 18 April 1988

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