Cu/Nb-Ti超導(dǎo)線銅-超比測量標(biāo)準(zhǔn)化現(xiàn)狀與建議

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Current Situation and Suggestions for Standardization of Cu/Nb -Ti Superconducting Wire Copper to Superconductor Ratio Measurement

GUO Qiang1. 2 WANG Feifei1 ZHOU Zijing2 YAN Guo1 LIU Xianghong3 LI Jianfeng3LI Jie4 LIU Yiping4 YANG Lihong4 SHI Yue4

（1.Western Superconducting Technologies Co.，Ltd.; 2.Xi'an Superconducting Wire Technologies Co.，Ltd.; 3.Northwest Institute for Non-ferous Metal Research; 4.Institute of Physics，Chinese Academyof Sciences）

Abstract：Copper tosuperconductorratioisaveryimportant performanceindicatorofCu/Nb-Tisuperconducting wires， whichis crucial forthe stable productionofCu/Nb-Ti superconducting wires and the accurate calculationof their critical current density. In recent years， the performance and quality level of Cu/Nb -Ti superconducting wires have continuously improved，and the domesticand international markets havebeen continuously expanded，and the industrialization development hasshownvigorous vitalityand vigor，withastrongdevelopment momentum.Thedemand forstandardization of accurate andeficient copper to superconductorratio measurement is becoming increasinglyurgent.This paper analyzes the situationand existing problems ofGB/T22587-2017，Matrix to superconductor volumeratio measurement-Copper to superconductor volume ratioofCu/Nb-Ti composite superconducting wires，and further putsforward suggestions for standardizationof Cu/Nb. Ti superconducting wire copper to superconductor ratio measurement. It promotes the progress and update of China's Cu/Nb -Ti superconducting wire measurement standardization， and provides strong support for the high-quality development of China's Nb-Ti superconducting wires.

Keywords： copper to superconductor ratio; Cu/Nb -Ti superconducting wires;measurement standardization; current situation; suggestions

0 引言

Cu/Nb-Ti超導(dǎo)材料為單相β型固溶體，其上臨界磁場（ Hc2 ）在4.2K約為 12To Nb-Ti超導(dǎo)體一般采用熔煉方法加工成合金，再使用集束拉拔工藝將其加工成以銅為基體的多芯復(fù)合超導(dǎo)線，最后通過結(jié)合時效熱處理的冷加工工藝，獲得由 β 單相合金轉(zhuǎn)變?yōu)榫哂袕娽斣行牡膬上?（a+β） 合金的結(jié)構(gòu)，其中 a 析出相作為釘扎中心提高材料的臨界電流密度。（剩余6172字）