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最近,美国加利福尼亚工学院工程材料实验室报导一种新型的铜基超导合金。通过普通冶金技术就可以加工成具有高磁场的超导线(直径0.2毫米)和带(厚0.2毫米)。典型成份有Cu_(?) Nb_(?) Sn_2和Cu_(?) V_(7.5) Si_(2.5),Tc=4—18K,价格与普通Cu线相当。冶金工艺是:成分配好后装在水冷的银舟里,在氩气氛中感应熔炼几次,然后以100℃/秒
Recently, the California Institute of Technology Engineering Materials Laboratory reported a new type of copper-based superconducting alloys. Superconducting wires with a high magnetic field (0.2 mm in diameter) and strips (0.2 mm thick) can be processed by conventional metallurgical techniques. The typical composition is Cu_ (?) Nb_ (?) Sn_2 and Cu_ (V) (7.5) Si_ (2.5), Tc = 4-18K. Metallurgical process is: components with good after installed in water-cooled silver boat, induction melting in an argon atmosphere several times, and then at 100 ℃ / s