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Oxidation Kinetics of UZr2.3 and U2Ti Alloys in Dry Air

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Abstract

The isothermal oxidation behavior of UZr2.3 and U2Ti alloys in dry air was studied by thermogravimetric technique in the temperature ranges of 773–848 and 548–623 K, respectively. The oxidation products were found to be U3O8 and ZrO2 for UZr2.3 and U3O8 and TiO2 for U2Ti by X-ray diffraction analysis. The oxidation kinetics were found to best fit into linear rate law for both the alloys in the temperature range of investigation and the lowest value of α (0.11 for UZr2.3 and 0.12 for U2Ti), which corresponds to the fraction of completed reaction. The linear rate constants (k) were evaluated from the oxidation data. The activation energies of oxidation reactions were calculated using the Arrhenius equation and found to be 161 kJ mol−1 for UZr2.3 and 88 kJ mol−1 for U2Ti.

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Acknowledgments

The authors are thankful to Shri B. N. Rath for rendering help in SEM and EDS analysis of the samples.

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Authors and Affiliations

  1. Product Development Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India

    S. P. Roy, N. K. Gupta, Ram Avtar Jat, S. C. Parida & S. K. Mukerjee

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  1. S. P. Roy
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  2. N. K. Gupta
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  3. Ram Avtar Jat
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  5. S. K. Mukerjee
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Correspondence to S. P. Roy.

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Roy, S.P., Gupta, N.K., Jat, R.A. et al. Oxidation Kinetics of UZr2.3 and U2Ti Alloys in Dry Air. Oxid Met 86, 165–177 (2016). https://doi.org/10.1007/s11085-016-9629-9

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  • DOI: https://doi.org/10.1007/s11085-016-9629-9

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