Studies on Jelly Roll Processed Nb3Sn Superconducting Wires Using Sn-Ta and Sn-Ti Based Alloy Sheets
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- Tachikawa Kyoji
- Department of Materials Science, Faculty of Engineering, Tokai University
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- Tsuyuki Tatsuro
- Department of Materials Science, Faculty of Engineering, Tokai University
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- Hayashi Yuuki
- Department of Materials Science, Faculty of Engineering, Tokai University
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- Nakata Koei
- Department of Materials Science, Faculty of Engineering, Tokai University
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- Takeuchi Takao
- National Institute for Materials Science
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- Iwaki Genzo
- Hitachi Cable, Ltd.
Bibliographic Information
- Other Title
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- Sn‐Ta系およびSn‐Ti系合金シートを用いたジェリーロール法Nb3Sn超伝導線材の研究
- Sn-Ta系およびSn-Ti系合金シートを用いたジェリーロール法Nb3Sn超伝導線材の研究
- Sn Taケイ オヨビ Sn Tiケイ ゴウキン シート オ モチイタ ジェリー ロールホウ Nb3Sn チョウデンドウ センザイ ノ ケンキュウ
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Abstract
Sn-Ta based alloy buttons of different compositions were prepared by the melt diffusion process among constituent metal powders at ∼780°C. The buttons were then pressed into plates. Sn-Ti based alloy plates were sliced from the melt and cast ingot. Resulting Sn-based alloy plates were rolled into thin sheets. The Sn-based alloy sheet was laminated with a commercial Nb sheet, and wound into a Jelly Roll (JR) composite. The composite was encased in a Nb-3.3 at% Ta sheath, and fabricated into a thin wire followed by the heat treatment at 700-775°C. The application of hydrostatic extrusion was useful for the fabrication of JR processed wires. The JR wires using Sn-Ta and Sn-Ti based alloy sheets show a non-Cu Jc of ∼250 A/mm2 at 20 T and 4.2 K, which is considerably higher than that of 16 wt% Sn bronze processed Nb3Sn wires. In the Sn-Ta based alloy sheet the dispersion of Ta powders improves mechanical strength of the sheet. Furthermore, it has been found that the Nb impregnates into the Sn-Ta based alloy layers, and Nb3Sn layers are synthesized by the mutual diffusion between the Nb and Sn-Ta based alloy sheets. Meanwhile, Sn-Ti based alloy sheet is attractive due to its easiness of mass production. Structure and performance of JR processed Nb3Sn wires prepared from Sn-based alloy sheets with different composition are compared.<br>
Journal
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- Journal of the Japan Institute of Metals and Materials
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Journal of the Japan Institute of Metals and Materials 71 (11), 946-951, 2007
The Japan Institute of Metals and Materials
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Keywords
Details 詳細情報について
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- CRID
- 1390001206479194368
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- NII Article ID
- 10019788747
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- NII Book ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL BIB ID
- 9263096
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed