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据《日经产业新闻》2月29月报道:日本科学技术厅金属材料技术研究所的太力川恭治教授最近开发成功一种真空冶金新技术。用这次技术制作的 V_3Ga 超导线材料,与用传统的扩散法制成的相比,具有临界电流密度高、性能稳定、生产成本低等优点。这种超导线材料可望在将来用作核聚变炉和高能粒子加速器中的超导电磁石。新的真空冶金技术的基本原理是,先用电流放电使原料钒和铜熔融,钒是树枝状结晶并散置在铜中成为合金;再将该合金锻压成带状,然后涂上镓层,经长时间高温热处理,合金中的钒、镓反应生成 V_3Ga 超导材料。
According to “Nikkei Industry News” reported in February 29: Japan Institute of Metals and Materials Technology, Institute of Metals and Materials Christine Christine Professor Li Gongchuan successfully developed a new vacuum metallurgy technology. V_3Ga superconducting wire made by this technique has the advantages of high critical current density, stable performance and low production cost compared with the traditional diffusion method. This superconducting wire material is expected to be used as a superconducting electromagnet in nuclear fusion furnaces and high-energy particle accelerators in the future. The basic principle of the new vacuum metallurgy technology is that firstly the current is discharged to melt the raw materials of vanadium and copper, the vanadium is dendritic crystal and is scattered in the copper to become the alloy; then the alloy is forged into a strip shape and then coated with a gallium layer, After prolonged high temperature heat treatment, the vanadium and gallium in the alloy react to form V_3Ga superconducting material.