Melt-Growth Joining of Superconductive YBCO Crystals with YBCO/Ag Insert

• Kuroki Takashi

  Department of Materials Process Engineering, Graduate School of Engineering, Kyushu University

• Mori Nobuyuki

  Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University

• Ogi Keisaku

  Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University

Bibliographic Information

Other Title

• 超伝導YBCO結晶のYBCO/Agによる溶融凝固接合
• チョウデンドウ YBCO ケッショウ ノ YBCO Ag ニ ヨル ヨウユウ ギョウコ セツゴウ

Abstract

Melt/growth mechanism and interfacial reaction of YBCO superconductive oxide with molten Ag and YBCO/Ag composite were analyzed to clarify the best fabricating condition of YBCO crystals junction.<BR>The peritectic temperature of YBCO(liquid+Y₂BaCuO₅(Y211)→YBa₂Cu₃O_7−x(Y123)) was lowered toward 1242(±2) K from 1280 K by the addition of Ag, and Y123 phase dissolved into liquid(containing Ag⁺)+Y211 phases above 1244 K. Therefore Ag and YBCO/Ag composites were used as the inserted low-melting point materials for Y123 crystals. The surface layer of YBCO crystal was melted due to Ag diffusion from inserted YBCO/Ag into the crystals. By cooling the joint under 1240 K, Y123 crystals developed from base YBCO and a superconductive joint was obtained.<BR>It was clarified that Ag diffuses from inserted YBCO/Ag composite into YBCO crystals mainly along Y123-Y211 boundaries.

Journal

• Journal of the Japan Institute of Metals and Materials

  Journal of the Japan Institute of Metals and Materials 66 (5), 492-498, 2002

  The Japan Institute of Metals and Materials

Keywords

• YBa<SUB>2</SUB>Cu<SUB>3</SUB>O<SUB>7−<I>x</I></SUB>
• YBCO/Ag composites
• interfacial reaction
• superconductive joint

Details

• CRID: 1390282681468776704
• NII Article ID: 130007342494
• NII Article ID: 10008833136
• NII Book ID: AN00187860
• DOI: 10.2320/jinstmet1952.66.5_492
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL BIB ID: 6179027
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6179027
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet1952/66/5/66_5_492/_pdf
• Data Source:
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  • CiNii Articles
• Abstract License Flag: Disallowed