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

Abstract

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.

Journal

• MATERIALS TRANSACTIONS

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

  The Japan Institute of Metals and Materials

Keywords

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

Details

• CRID: 1390282679227365632
• NII Article ID: 10018508301
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.48.89
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB 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
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed