Possibility of material cost reduction toward development of low-cost second-generation superconducting wires
Possibility of material cost reduction toward development of low-cost second-generation superconducting wires
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DOI：
10.7567/jjap.56.103101
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发表时间：
2017-09
影响因子：
1.5
通讯作者：
A. Ichinose;S. Horii;T. Doi
中科院分区：
文献类型：
--
作者：
A. Ichinose;S. Horii;T. Doi
本文提出了两种降低第二代超导线材材料成本的方法：（1）代替目前在超导层上使用的银和铜的电稳定层，提出了掺杂Nb的SrTiO 3导电缓冲层和立方织构Cu作为先进的结构，以及（2）在常规结构中使用电磁（EM）钢带作为涂覆导体的金属基底。在超导层上不使用电稳定层而制造的结构中，在自场中在77 K下实现的临界电流密度约为2.6 MA/cm 2。另一方面，在使用EM钢带的情况下，虽然临界电流密度在现阶段远未实用，但在金属表面上没有氧化的情况下实现了YBa 2Cu 3 Oy（YBCO）和缓冲层的双轴取向。在这项研究中，材料成本降低的可能性已被强烈表明，在不久的将来，低成本的第二代超导线材的发展。
Two approaches to reducing the material cost of second-generation superconducting wires are proposed in this paper: (1) instead of the electrical stabilizing layers of silver and copper presently used on the superconducting layer, a Nb-doped SrTiO3 conductive buffer layer and cube-textured Cu are proposed as an advanced architecture, and (2) the use of an electromagnetic (EM) steel tape as a metal substrate of coated conductors in a conventional architecture. In structures fabricated without using electrical stabilizing layers on the superconducting layer, the critical current density achieved at 77 K in a self-field was approximately 2.6 MA/cm2. On the other hand, in the case of using EM steel tapes, although the critical current density was far from practical at the current stage, the biaxial alignment of YBa2Cu3Oy (YBCO) and buffer layers was realized without oxidation on the metal surface. In this study, the possibility of material cost reduction has been strongly indicated toward the development of low-cost second-generation superconducting wires in the near future.