Bronze Processed Nb₃Sn Multifilamentary Wires Using Various Cu-Sn-Zn Solid Solution Strengthened Bronze Alloy Matrices

• Hishinuma Yoshimitsu

  National Institute for Fusion Science

• Taniguchi Hiroyasu

  Osaka Alloying Works Co., Ltd

• Kikuchi Akihiro

  National Institute for Materials Science

Bibliographic Information

Other Title

• Cu-Sn-Zn 固溶ブロンズ合金を用いた Nb₃Sn 極細多芯線材
• Cu-Sn-Zn固溶ブロンズ合金を用いたNb₃Sn極細多芯線材
• Cu-Sn-Znコヨウ ブロンズ ゴウキン オ モチイタ Nb ₃ Sn ゴクボソ タシン センザイ

Abstract

 In the magnetic confinement type fusion reactor, we thought that the high critical current density (J_c) performance Nb₃Sn wire will become the first candidate material for the future fusion magnet system due to its established industrial mass production and its technical achievements. However, the degradation of transport J_c property due to the high mechanical and thermal strains on the practical Nb₃Sn wire is a serious problem to apply for the future fusion magnet to be operated under higher electromagnetic force environment. We developed the new bronze processed Nb₃Sn wire using the Zinc (Zn) solid solution high Sn content bronze (Cu-Sn-Zn) alloy matrix for improvement of the mechanical strength by the solid solution strengthening. We also confirmed that the Zn promoted to diffuse between Nb and Sn elements, and that Zn homogeneously remained in the matrix after the diffusion reaction. In the Nb₃Sn wires with various Cu-Sn-Zn-(Ti) alloy matrices, the non-Cu J_c value was increased by the two-stage heat treatment, and the maximum non-Cu J_c values under the external magnetic fields of 15 T and 18 T at 4.2 K were obtained about 420 and 160 A/mm². The degree of J_c enhancement due to the two-stage heat treatment was estimated 30% higher compared with one-stage heat treatment. Change in the microstructure and the non-Cu J_c enhancement due to the two-stage heat treatment on the Nb₃Sn multifilamenatry wire with various Cu-Sn-Zn alloy matrices were reported.<br>

Journal

• Journal of the Japan Institute of Metals and Materials

  Journal of the Japan Institute of Metals and Materials 80 (7), 473-479, 2016

  The Japan Institute of Metals and Materials

Keywords

• bronze processed Nb₃Sn
• copper-tin-zinc ternary alloy matrix
• solid solution strengthening
• microstructure
• superconducting property

Details

• CRID: 1390282681459660288
• NII Article ID: 130005158334
• NII Book ID: AN00187860
• DOI: 10.2320/jinstmet.jc201607
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL BIB ID: 027528231
• Web Site: http://id.ndl.go.jp/bib/027528231
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027528231
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet/80/7/80_JC201607/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed