Thermodynamic Calculation of Phase Equilibria in the Nb-Ni-Ti-Zr Quaternary System

• Tokunaga Tatsuya

  Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST)

• Matsumoto Satoshi

  Graduate School of Engineering, Kyushu Institute of Technology

• Ohtani Hiroshi

  Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST) Department of Materials Science and Engineering, Kyushu Institute of Technology

• Hasebe Mitsuhiro

  Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST) Department of Materials Science and Engineering, Kyushu Institute of Technology

抄録

The phase equilibria in the Nb-Ni-Ti-Zr quaternary system have been studied using the CALPHAD method. Among the four ternary systems present in the quaternary phase diagram, the Nb-Ti-Zr ternary system was described using a simple ternary extrapolation of the constituent binary systems with no additional ternary parameters. The thermodynamic parameters of the Ni-Ti-Zr ternary system were evaluated using data from first-principles calculations on the ternary NiTi, NiZr, and NiTiZr compound phases as well as available experimental data on the phase boundaries. The calculated isothermal and vertical section diagrams of both the Nb-Ti-Zr and Ni-Ti-Zr ternary systems reproduced the experimental results satisfactorily. The thermodynamic parameters of the Nb-Ni-Ti and Nb-Ni-Zr ternary systems were adopted from previous studies. The liquidus surface in the Nb-Ni-Ti-Zr quaternary system was calculated based on the thermodynamic description of the ternary systems. According to the calculated liquidus surface of Nb_40−x−yNi₆₀Ti_xZr_y alloys, in which a metallic glass was formed over a wide composition range, the liquidus temperature decreased with increasing Zr content up to 20 mol%Zr.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 48 (2), 89-96, 2007

  公益社団法人 日本金属学会

キーワード

• phase equilibria
• niobium-nickel-titanium-zirconium
• thermodynamic analysis
• calculation of phase diagrams (CALPHAD)

詳細情報

• CRID: 1390282679227365632
• NII論文ID: 10018508301
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.48.89
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 8623475
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8623475
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/48/2/48_MBW200681/_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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  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可