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Study of non-isothermal crystallization of amorphous Cu50Ti50 alloy

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Abstract

The crystallization kinetics of amorphous Cu50Ti50 has been studied using differential scanning calorimetry (DSC) under non-isothermal conditions. The curves at different linear heating rates (2, 4, 8 and 16 K min−1) show sharp crystallization peaks. The crystallization peak shifts to higher temperatures with increasing heating rate. The Kissinger’s method of analysis of the shift in the transformation peak is applied to evaluate the activation energy (E c). The KJMA formalism, which is basically developed for isothermal experiments, is also used to obtain E c and the Avrami parameter (n).

The DSC data have been analysed in terms of kinetic parameters, viz. activation energy (E c), Avrami exponent (n) and frequency factor K 0 using three different theoretical models. It is observed that the activation energy values derived from KJMA approach and modified Kissinger equation agree fairly well with each other. The activation energy values obtained from normal Kissinger method, and Gao and Wang expression underestimate the activation energy.

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Authors and Affiliations

  1. Electronics Department, Narmada College of Science and Commerce, 392 011, Zadeshwar, Bharuch, India

    T. L. Shanker Rao

  2. Condensed Matter Physics Laboratory, Applied Physics Department, Faculty of Technology and Engineering, M. S. University of Baroda, 390 001, Vadodara, India

    K. N. Lad & A. Pratap

Authors
  1. T. L. Shanker Rao
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  2. K. N. Lad
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  3. A. Pratap
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Corresponding author

Correspondence to A. Pratap.

Additional information

The financial support provided by All India Council for Technical Education (AICTE), New Delhi (Govt. of India) is gratefully acknowledged.

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Shanker Rao, T.L., Lad, K.N. & Pratap, A. Study of non-isothermal crystallization of amorphous Cu50Ti50 alloy. J Therm Anal Calorim 78, 769–774 (2004). https://doi.org/10.1007/s10973-005-0444-0

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  • DOI: https://doi.org/10.1007/s10973-005-0444-0

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