Effect of biaxial cold pressure densification (BCPD) on Ba0.6K0.4Fe2As2 round wire using optimized precursor

被引：6
作者：
Li, X. [1 ,2 ,3 ]
Collings, E. W. [3 ]
Wan, F. [3 ]
Sumption, M. D. [3 ]
Xue, S. C. [3 ]
Zhang, D. L. [3 ]
Rindfleisch, M. A. [4 ]
Tomsic, M. J. [4 ]
Shi, Z. X. [1 ,2 ]
机构：
[1] Southeast Univ, Sch Phys, Nanjing 211189, Jiangsu, Peoples R China
[2] Southeast Univ, MEMS, Key Lab, Minist Educ, Nanjing 211189, Jiangsu, Peoples R China
[3] Ohio State Univ, Dept Mat Sci & Engn, 116 W 19Th Ave, Columbus, OH 43210 USA
[4] Hyper Tech Res Inc, 539 Ind Mile Rd, Columbus, OH 43228 USA
来源：
CERAMICS INTERNATIONAL | 2018年 / 44卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Ba0.6K0.4Fe2As2; superconductor; Powder preparation and optimization; Biaxial cold pressure densification; Superconductivity; CRITICAL-CURRENT DENSITY; SUPERCONDUCTIVITY; MAGNETIZATION;
D O I：
10.1016/j.ceramint.2017.11.111
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
(Ba,Sr)(1-x)KxFe2As2 superconductor is of great interest as a wire for practical applications. In this paper, Ba0.6K0.4Fe2As2 precursor powder was prepared by high-energy ball-milling aided sintering (12 h/750 degrees C). The prepared precursor was drawn to powder-in-tube round wire. Partial as-drawn wires were subjected to biaxial cold pressure densification (BCPD) at 0.5 and 1.0 GPa, followed by an annealing for 1 min/770 degrees C. According to our results, the BCPD improved the grain connectivity of the BCPDed wires without degrading the superconductivity. A (Ba,Sr)(1-x)KxFe2As2 round-wire record transport critical current density, 1.14 x 10(5) A/cm(2) (4.2 K, 2 T), was observed in our BCPDed samples.
引用
收藏
页码：4457 / 4461
页数：5
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