文章信息/Info

Title:

Research Progress of Nb3Al Superconducting Wire for High-field Application

作者:

崔利軍1; 潘熙鋒1; 齊銘2; 3; 白質(zhì)明3; 王大友1; 閆果1; 劉向宏1; 馮勇1; 張平祥1; 2

1.西部超導(dǎo)材料科技股份有限公司，超導(dǎo)材料制備國家工程實(shí)驗(yàn)室，陜西 西安 710018

2.西北有色金屬研究院，陜西 西安 710016

3.東北大學(xué)，遼寧 沈陽 110004

Author(s):

 CUI Lijun1;  PAN Xifeng1;  QI Ming2; 3; BAI Zhiming3; WANG Dayou1;  YAN Guo1;  LIU Xianghong1;  FENG Yong1;  ZHANG Pingxiang1; 2

1.West Superconducting Technologies Co.,Ltd. National Engineering Laboratory for Superconducting Materials Xi’an 710018, China

2.Northwest Institute for Nonferrous Metal Research Xi’an 710016, China

3.Northeastern University, Shenyang 110004, China

關(guān)鍵詞:

Nb3Al; 超導(dǎo)線材; 制備工藝; 超導(dǎo)性能

DOI:

10.7502/j.issn.1674-3962.2015.01.06

文獻(xiàn)標(biāo)志碼:

A

摘要:

Nb3Al超導(dǎo)體的超導(dǎo)轉(zhuǎn)變溫度（Tc）和上臨界磁場（Hc2）與Nb3Sn類似，但具有更好的應(yīng)力應(yīng)變?nèi)菰S特性和高場臨界電流密度（Jc）。因此，被認(rèn)為是下一代高場磁體應(yīng)用的理想材料。目前國際上報道的Nb3Al超導(dǎo)線材單根長度可以達(dá)到2.6 km；在4.2K和15 T條件下，Jc達(dá)到1000 A/mm2；但是由于制備工藝的復(fù)雜性，目前仍然無法實(shí)現(xiàn)大規(guī)模工業(yè)化應(yīng)用。本文結(jié)合Nb3Al超導(dǎo)材料的基本性質(zhì)，系統(tǒng)介紹了Nb3Al超導(dǎo)線材前驅(qū)體的制備方法、熱處理工藝和覆Cu工藝，對不同的制備方法進(jìn)行了比較，重點(diǎn)分析了線材制備過程中存在的關(guān)鍵性難點(diǎn)問題；最后展望了Nb3Al超導(dǎo)材料的發(fā)展趨勢。

Abstract:

The superconducting transition temperament (Tc) and upper critical magnetic field （Hc2）of Nb3Al superconductor are similar to Nb3Sn, but it has better strain tolerance and higher critical current（Jc）at high field. Therefore, Nb3Al superconductor is considered as a very appealing material for use in future high field application. At present, the Nb3Al superconducting wire with 2.6km-long length had been reported, which exhibited a large Jc of 1000A/mm2 at 4.2K and 15T. Due to the complexity of fabrication techniques, it can not be commercial application. In this paper, various precursor fabrication、heat-treatment and cladding Cu techniques are described and compared, and the difficulties of fabrication processes were analysed especially. In the end, a perspective and future development of Nb3Al superconductor was given.