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Synthesis of bulk metallic glass composites using high oxygen containing Zr sponge

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Abstract

The effect of large concentration of oxygen on the microstructural development of Zr–Cu–Al–Ni bulk metallic glass (BMG) alloys, prepared from commercially available Zr sponge, has been studied. Apart from promoting crystallization, increased concentration of oxygen (∼8000 ppm) spawns additional phases. In particular, we report the appearance of α-Zr, dendritic Zr2Cu phase and the Zr2Ni type cubic phases. Addition of oxygen scavenger like Yttrium only partially solves the problem. Phase evolution was also found to be sensitive to the cooling rate and hence to the thickness of the cast sample. Thus it is possible to produce a gradient microstructure with predominantly amorphous phase at the outer layer.

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Acknowledgment

Financial support for this work was provided by a grant to IISc by the Defence Research and Development Organization (DRDO), Government of India.

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Authors and Affiliations

  1. Department of Materials Engineering, Indian Institute of Science, Bangalore, 560012, India

    Ranadeep Bhowmick, Dinesh K. Misra, Upadrasta Ramamurty & K. Chattopadhyay

  2. Defense Metallurgical Research Laboratory, Kanchanbagh, Hyderabad, 500058, India

    Bhaskar Majumdar

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  1. Ranadeep Bhowmick
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  2. Bhaskar Majumdar
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  3. Dinesh K. Misra
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  4. Upadrasta Ramamurty
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  5. K. Chattopadhyay
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Correspondence to K. Chattopadhyay.

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Bhowmick, R., Majumdar, B., Misra, D.K. et al. Synthesis of bulk metallic glass composites using high oxygen containing Zr sponge. J Mater Sci 42, 9359–9365 (2007). https://doi.org/10.1007/s10853-007-1856-7

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  • DOI: https://doi.org/10.1007/s10853-007-1856-7

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