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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/024/01/0027-0033

    • Keywords

       

      Crystallization kinetics; high-energy heavy ion irradiation; morphology.

    • Abstract

       

      Differential scanning calorimeter (DSC) is employed to study the crystallization kinetics of irradiated (at three different fluences with high-energy heavy ion; Ni11+ of 150 MeV) specimens of two Co-based metallic glasses. It is found that the crystallization process in both the glasses is completed in two phases. The DSC data have been analysed in terms of kinetic parameters viz. activation energy (𝐸𝑐), Avrami exponent (𝑛), dimensionality of growth (𝑚), using two different theoretical models. The results obtained have been compared with that of virgin samples. The lower activation energy in case of second crystallization occurring at higher temperature indicates the easier nucleation of second phase. The abnormally high value of Avrami exponent in Co–Ni glass indicates very high nucleation rate during first crystallization.

    • Author Affiliations

       

      Rohit Jain1 Deepika Bhandari1 N S Saxena1 S K Sharma2 A Tripathi3

      1. Department of Physics, University of Rajasthan, Jaipur 302 004, India
      2. Department of Physics, Malaviya Regional Engineering College, Jaipur 302 017, India
      3. Nuclear Science Centre, Aruna Asaf Ali Marg, New Delhi 110 067, India

    • Dates

       
      Published
      February 2001
      Manuscript received
      5 September 2000
      Manuscript revised
      18 October 2000

  • Bulletin of Materials Science | News

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      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
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    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

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