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Accuracy in the experimental calorimetric study of the crystallization kinetics and predictive transformation diagrams: Application to a Ga–Te amorphous alloy

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Abstract

The uncertainties inherent to experimental differential scanning calorimetric data are evaluated. A new procedure is developed to perform the kinetic analysis of continuous heating calorimetric data when the heat capacity of the sample changes during the crystallization. The accuracy of isothermal calorimetric data is analyzed in terms of the peak-to-peak noise of the calorimetric signal and base line drift typical of differential scanning calorimetry equipment. Their influence in the evaluation of the kinetic parameter is discussed. An empirical construction of the time-temperature and temperature-heating rate transformation diagrams, grounded on the kinetic parameters, is presented. The method is applied to the kinetic study of the primary crystallization of Te in an amorphous alloy of nominal composition Ga20Te80, obtained by rapid solidification.

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Author notes

  1. M. Fontana

    Present address: Departamento de Física, Facultad de Ingenieria, Universidad de Buenos Aires, Paseo Colòn 850 (1063), Buenos Aires, Argentina

Authors and Affiliations

  1. Grup de Física de L’Estat Sòlid, Departament d’Estructura i Constituents de la Matèria, Facultat de F’isica, Universitat de Barcelona, Diagonal 647, Barcelona, 08028, Spain

    N. Clavaguera

  2. Grup de Física de Materials, Departament de Física, Edifici C, Universitat Autònoma de Barcelona, Bellaterra, 08193, Spain

    M. T. Clavaguera-Mora & M. Fontana

Authors
  1. N. Clavaguera
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  2. M. T. Clavaguera-Mora
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  3. M. Fontana
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Clavaguera, N., Clavaguera-Mora, M.T. & Fontana, M. Accuracy in the experimental calorimetric study of the crystallization kinetics and predictive transformation diagrams: Application to a Ga–Te amorphous alloy. Journal of Materials Research 13, 744–753 (1998). https://doi.org/10.1557/JMR.1998.0094

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  • DOI: https://doi.org/10.1557/JMR.1998.0094

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