曾报道过研究“MF Nb/Cu挤压复合管富Sn中心扩散法制备 MF Nb_3Sn超导线材工艺”的初步结果:1)线材容易加工;2)在4—6 T场强下,短样的有效临界电流密度高。美国IGC的Schwall等人用同样的方法制备 MF Nb_3Sn超导线材(作者称“Sn芯法”);日本三菱公司的 Yoshizaki等人先制成 MF Nb/Cu挤压复合棒,然后在棒的中心沿轴向钻孔,获得MF Nb/Cu复合管,用以制备MF Nb_3Sn超导线材(作者称“内Sn扩散法”)。 We have reported the preliminary results of “MF Nb / 3Sn Superconducting Wire Fabrication Process for the MF Nb / Cu Extruded Composite Tube with Sn-Rich Center-Diffusion Method”: 1) The wire is easy to process; 2) The effective critical current density is high. In the same way, Smith et al. From IGC of the United States made MF Nb_3Sn superconducting wire (the author called “Sn core method”) by the same method. Yoshizaki et al. From Japan’s Mitsubishi Corporation first made MF Nb / Cu extruded composite rod, Bored in the axial direction, an MF Nb / Cu composite tube was obtained for the preparation of an MF Nb 3 Sn superconducting wire (the “Sn Sn diffusion method” by the author).