【摘要】 本文报道了青铜法55×55芯 Nb/Cu-7.4at％Sn-（0.5、0.6）at％Ti复合线的超导性能。导体临界电流密度J_c（青铜十铌）最佳值:Nb/Cu-7.4at％Sn-0.6at％Ti复合线,在4.2K、16T和20T下分别为300A/mm₂和133A/mm₂。Nb/Cu-7.4at％Sn-0.5at％Ti复合线,在4.2K和ZK、20T下分别为119A/mm₂和219A/mm₂。超导转变温度T_c为17.30～17.45K。上临界磁场B_c2^*在4.2K和2K下分别为26.0～26.8T和29T。更多还原

【Abstract】 A decription is made on the superconducting properties of 55 X 55 cores multifilamentary Nb/Cu-7.4Sn-(0.5, 0.6)Ti composite wires made of the bronze process. The optimized values of the critical current densities J, (Bronze + Nb) are as follows 300A/mm2 133A/mm2 at 16.T and 20T, 4.2K, respectively for Nb/Cu-7.4Sn-0.6 at% Ti composite wires. 119A/mm2 and 219A/mm2 at 4.2K and 1.8K, 20T, respectively for Nb/Cu-7.4Sn-0.5Ti wires. Superconducting critical temperature Tc ranges from 17.30 K to 17.45 K. Up-critical fields Bc2 are 26.0-26.8T and 29T at 4.2K and 2K, respectively.更多还原