Ultrahigh Strength and High Electrical Conductivity Characteristics of Cu-Zr Alloy Wires with Nanoscale Duplex Fibrous Structure

• Kimura Hisamichi

  Institute for Materials Research, Tohoku University

• Inoue Akihisa

  Institute for Materials Research, Tohoku University

• Muramatsu Naokuni

  NGK INSULATORS, LTD

• Shin Keesam

  Dept. of Metallurgy and Materials Science School of Nano and Advanced Materials, Changwon National University

• Yamamoto Tokujiro

  Institute for Materials Research, Tohoku University

抄録

The cold drawing of cast Cu_100−xZr_x (x=3, 4 and 5 at%) alloys to the reduction ratio of 99.7% was found to cause simultaneous achievement of ultrahigh tensile strength of 1350 to 1800 MPa and high electrical conductivity of 30 to 45%IACS (International Annealed Copper Standard). The cold-drawn Cu₉₅Zr₅ alloy wire has a well-developed fibrous structure of fcc-Cu and tetragonal Cu₉Zr₂ phases. The volume ratio of the fcc-Cu phase was evaluated to be about 76%. A very high density of internal defects was observed inside the Cu₉Zr₂ phase in the cold-drawn Cu₉₅Zr₅ alloy. The microstructure data suggest that the Cu fibrous phase with high aspect ratios is the origin for the achievement of high electrical conductivity and the well-developed fibrous structure contributes to the high tensile strength. The success of synthesizing the Cu-Zr alloy wire with simultaneously high tensile strength and high electrical conductivity exceeding the best combination of all Cu-based alloys reported up to data is expected to be used as a new type of high-strength and high conductivity material because of some advantages of energy saving, low materials cost and simple production process.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 47 (6), 1595-1598, 2006

  公益社団法人 日本金属学会

キーワード

• copper-zirconium alloy
• wire
• tensile strength
• electrical conductivity
• fibrous structure

詳細情報

• CRID: 1390282679227494400
• NII論文ID: 130004453175
• NII論文ID: 10018160719
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.47.1595
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 7951151
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7951151
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/47/6/47_6_1595/_pdf
• 本文言語コード: en
• データソース種別:
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  • NDL
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