Fabrication of high-performance Fe(Se, Te) wires via rapid heating and quenching treatment

IF 7.1 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International Pub Date : 2026-04-01 Epub Date: 2026-03-12 DOI:10.1016/j.pnsc.2026.02.002

Jixing Liu, Botao Shao, Shengnan Zhang, Jianfeng Li, Pingxiang Zhang, Lian Zhou

{"title":"Fabrication of high-performance Fe(Se, Te) wires via rapid heating and quenching treatment","authors":"Jixing Liu, Botao Shao, Shengnan Zhang, Jianfeng Li, Pingxiang Zhang, Lian Zhou","doi":"10.1016/j.pnsc.2026.02.002","DOIUrl":null,"url":null,"abstract":"<div><div>The practical application of iron-based superconductors in high-field magnets necessitates the development of wires with high critical current density (Jc). Fe(Se, Te) materials, characterized by their simple crystal structure and low anisotropy, are promising candidates. However, fabricating high-performance Fe(Se, Te) wires via the powder-in-tube (PIT) method remains challenging due to the volatilization of Se/Te and the formation of non-superconducting phases during conventional heat treatments, which degrade grain connectivity and core density. This study introduces and validates a Rapid Heating and Quenching Treatment (RHQT) process as an innovative heat treatment for in-situ Fe(Se, Te) wires. Comparative analyses with traditional melting and solid-state sintering (SSS) methods demonstrate that the RHQT process effectively suppresses elemental volatilization, yielding a dense, chemically homogeneous, and primarily tetragonal β-Fe(Se, Te) phase filament with enhanced grain boundary connectivity. Consequently, the RHQT-processed wire exhibits superior superconducting properties: the highest transition temperature (Tc) of 14.5 K, the sharpest transition width (ΔTc = 3.9 K), and significantly enhanced critical current density. The magnetic Jc at 5 K and self-field reached ∼4.0 × 104 A/cm2, while the transport Jc at 4.2 K achieved a high-performance of 6226 A/cm2 for single-core Fe(Se, Te) wires. Moreover, the RHQT wire demonstrated exceptional in-field performance, with a much slower Jc decay, attributed to strong vortex pinning at the well-connected grain boundaries. These results unequivocally establish the RHQT process as a highly advantageous fabrication route for application of Fe(Se, Te) superconducting wires.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":"36 2","pages":"Pages 393-399"},"PeriodicalIF":7.1000,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Progress in Natural Science: Materials International","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1002007126000092","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/3/12 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The practical application of iron-based superconductors in high-field magnets necessitates the development of wires with high critical current density (J_c). Fe(Se, Te) materials, characterized by their simple crystal structure and low anisotropy, are promising candidates. However, fabricating high-performance Fe(Se, Te) wires via the powder-in-tube (PIT) method remains challenging due to the volatilization of Se/Te and the formation of non-superconducting phases during conventional heat treatments, which degrade grain connectivity and core density. This study introduces and validates a Rapid Heating and Quenching Treatment (RHQT) process as an innovative heat treatment for in-situ Fe(Se, Te) wires. Comparative analyses with traditional melting and solid-state sintering (SSS) methods demonstrate that the RHQT process effectively suppresses elemental volatilization, yielding a dense, chemically homogeneous, and primarily tetragonal β-Fe(Se, Te) phase filament with enhanced grain boundary connectivity. Consequently, the RHQT-processed wire exhibits superior superconducting properties: the highest transition temperature (T_c) of 14.5 K, the sharpest transition width (ΔT_c = 3.9 K), and significantly enhanced critical current density. The magnetic J_c at 5 K and self-field reached ∼4.0 × 10⁴ A/cm², while the transport J_c at 4.2 K achieved a high-performance of 6226 A/cm² for single-core Fe(Se, Te) wires. Moreover, the RHQT wire demonstrated exceptional in-field performance, with a much slower J_c decay, attributed to strong vortex pinning at the well-connected grain boundaries. These results unequivocally establish the RHQT process as a highly advantageous fabrication route for application of Fe(Se, Te) superconducting wires.

查看原文本刊更多论文

快速加热淬火制备高性能Fe（Se, Te）丝

铁基超导体在高磁场磁体中的实际应用需要发展具有高临界电流密度（Jc）的导线。Fe（Se, Te）材料具有晶体结构简单、各向异性低的特点，是很有前途的材料。然而，由于常规热处理过程中Se/Te的挥发和非超导相的形成，降低了晶粒连通性和芯密度，因此通过管内粉末（PIT）方法制备高性能Fe（Se, Te）线仍然具有挑战性。本研究介绍并验证了快速加热和淬火处理（RHQT）工艺作为原位Fe（Se, Te）钢丝的创新热处理。与传统熔融和固态烧结（SSS）方法的对比分析表明，RHQT工艺有效地抑制了元素挥发，产生了致密的、化学均匀的、主要是四方的β-Fe（Se, Te）相长丝，增强了晶界连接性。因此，rhqt加工的导线表现出优异的超导性能：最高转变温度（Tc）为14.5 K，最陡转变宽度（ΔTc = 3.9 K），临界电流密度显著提高。在5k和自场下，磁性Jc达到了~ 4.0 × 104 A/cm2，而在4.2 K下，单芯Fe（Se, Te）导线的输运Jc达到了6226 A/cm2的高性能。此外，由于在连接良好的晶界处有强大的涡流钉住，RHQT线表现出了出色的场内性能，其Jc衰减速度要慢得多。这些结果明确地确立了RHQT工艺是应用Fe（Se, Te）超导线的非常有利的制造路线。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Progress in Natural Science: Materials International 综合性期刊-综合性期刊

CiteScore

8.60

自引率

2.10%

发文量

2812

审稿时长

49 days

期刊介绍： Progress in Natural Science: Materials International provides scientists and engineers throughout the world with a central vehicle for the exchange and dissemination of basic theoretical studies and applied research of advanced materials. The emphasis is placed on original research, both analytical and experimental, which is of permanent interest to engineers and scientists, covering all aspects of new materials and technologies, such as, energy and environmental materials; advanced structural materials; advanced transportation materials, functional and electronic materials; nano-scale and amorphous materials; health and biological materials; materials modeling and simulation; materials characterization; and so on. The latest research achievements and innovative papers in basic theoretical studies and applied research of material science will be carefully selected and promptly reported. Thus, the aim of this Journal is to serve the global materials science and technology community with the latest research findings. As a service to readers, an international bibliography of recent publications in advanced materials is published bimonthly.