Thermodynamic Calculation of Phase Equilibria in the Nb-Ni-Ti-Zr Quaternary System
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- Tokunaga Tatsuya
- Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST)
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- Matsumoto Satoshi
- Graduate School of Engineering, Kyushu Institute of Technology
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- 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
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- 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
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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 Nb40−x−yNi60TixZry 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
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 48 (2), 89-96, 2007
The Japan Institute of Metals and Materials
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Details 詳細情報について
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- CRID
- 1390282679227365632
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- NII Article ID
- 10018508301
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- NII Book ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL BIB ID
- 8623475
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed