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Thermal studies for preparation of Nb10Hf1Ti Alloy

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Abstract

The aim of this work is to evaluate the feasibility of preparation of Nb10Hf1Ti alloy by magnesiothermic reduction of its oxides. DTA studies were conducted to identify the reduction temperature for co reduction of the mixed oxides of Nb2O5, HfO2, and TiO2 by magnesium under reducing atmosphere. Based on DTA analysis, experiments were carried out to prepare Nb10Hf1Ti alloy by magnesiothermic reduction of their oxides at 750 °C. The reduced product was analyzed for its phases by X-ray diffraction. The excess Mg was leached out, the alloy mixture was vacuum dried, pelletized, sintered, and electron beam melted to get a consolidated alloy of the required composition. The alloy was characterized using different techniques such as optical microscopy, scanning electron microscopy, and chemical analysis. Microstructural observations revealed the formation of coarse grain structure in the consolidated alloy. The alloy product was also evaluated for its micro hardness.

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Acknowledgements

The authors wish to thankfully acknowledge Dr. Sanjib Mazumdar for all the assistance in SEM and TG analysis. The authors are also grateful to Dr. A. Awasthi for useful discussions during the preparation of the Manuscript.

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Authors and Affiliations

  1. Materials Processing Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400 085, India

    Pamela Alex, Jugal Kishor & I. G. Sharma

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  1. Pamela Alex
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  2. Jugal Kishor
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  3. I. G. Sharma
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Correspondence to Pamela Alex.

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Alex, P., Kishor, J. & Sharma, I.G. Thermal studies for preparation of Nb10Hf1Ti Alloy. J Therm Anal Calorim 112, 45–50 (2013). https://doi.org/10.1007/s10973-012-2685-8

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  • DOI: https://doi.org/10.1007/s10973-012-2685-8

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