Thermodynamic Modeling of the Undercooled Liquid in the Ni–Zr System

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  • Abe Taichi
    Computational Materials Science Center, National Institute for Materials Science
  • Onodera Hidehiro
    Computational Materials Science Center, National Institute for Materials Science
  • Shimono Masato
    Computational Materials Science Center, National Institute for Materials Science
  • Ode Machiko
    Computational Materials Science Center, National Institute for Materials Science

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  • Thermodynamic Modeling of the Undercooled Liquid in the Ni–Zr System

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Abstract

Using thermodynamic data obtained over a wide range of temperatures, a thermodynamic assessment of the Ni–Zr system was carried out. The associated solution model was applied to describe the short range ordering in the liquid, and the glass transition was treated as a second order transition, using the Hillert–Jarl functions. The driving force of crystallization, and the time–temperature–transformation (TTT) curves were estimated from the optimized parameter set, and compared with experimental data and the results of previous thermodynamic assessments. Taking into account the low temperature thermodynamic data, the calculated driving force was found to have decreased compared to the previous assessments. Consequently, the nose of the TTT curve was shifted to higher times.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 46 (12), 2838-2843, 2005

    The Japan Institute of Metals and Materials

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