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Studies on the effect of milling on reduction of niobium pentaoxide with aluminium

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Abstract

The effect of milling on the aluminothermic reduction of niobium pentaoxide was investigated. Charges of Nb2O5 and Al (containing 5 % excess Al) were milled for different time (2, 5 and 10 h). XRD profile of milled samples indicated no phase formations during milling; only peak broadening were seen. Milled and unmilled charges were heated in a thermal analyser up to 1,400 °C. Products of milled charges showed formation of Nb, NbO and Al2O3; whereas unmilled hand mixed charges showed formations of Nb3Al along with Nb and Al2O3. The tendency of milled charges towards Nb formations without the presence of aluminides was explained from the increase in surface area of charges caused by particle reduction.

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Authors and Affiliations

  1. Fusion Reactor Materials Section, Bhabha Atomic Research Centre, Mumbai, 400085, India

    Abhishek Mukherjee & Nagaiyar Krishnamurthy

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  1. Abhishek Mukherjee
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  2. Nagaiyar Krishnamurthy
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Correspondence to Abhishek Mukherjee.

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Mukherjee, A., Krishnamurthy, N. Studies on the effect of milling on reduction of niobium pentaoxide with aluminium. J Therm Anal Calorim 115, 621–625 (2014). https://doi.org/10.1007/s10973-013-3301-2

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  • DOI: https://doi.org/10.1007/s10973-013-3301-2

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