Abstract
The vanadium–aluminum alloy has been prepared by aluminothermy process. The alloy ingot obtained was refined by electron beam melting and homogenized by vacuum arc melting technique. The refined alloy was crushed into small pieces. These pieces were kept isothermally in a thermobalance attached to the Sieverts apparatus for the hydrogen charging. Reacted fraction α was calculated using isothermal thermo-gravimetry method. The reacted fraction α–t data thus obtained have been linearly fitted over a suitable reaction mechanism function. Rate constants at different temperatures are determined using slope of these linearly fitted curves. Activation energy of hydrogen charging has been calculated using Arrhenius equation.
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Acknowledgements
The authors record their sincere appreciation to Dr. Anamika Singh, Research Associate, Department of Biotechnology, Government of India and Mr. Samarjeet Kumar of Tata Consultancy Services, Mumbai, and Amit Tirpude from IIT Bombay for their technical assistance during the data analysis.
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Kumar, S., Taxak, M. & Krishnamurthy, N. Hydrogen absorption kinetics of V–Al alloy. J Therm Anal Calorim 112, 5–10 (2013). https://doi.org/10.1007/s10973-012-2558-1
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DOI: https://doi.org/10.1007/s10973-012-2558-1