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Journal of Materials Science

, Volume 42, Issue 22, pp 9359–9365 | Cite as

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

  • Ranadeep Bhowmick
  • Bhaskar Majumdar
  • Dinesh K. Misra
  • Upadrasta Ramamurty
  • K. Chattopadhyay
Article

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.

Keywords

Differential Scanning Calorimetry Bulk Metallic Glass Glassy Phase Glass Form Ability Fine Dendrite 

Notes

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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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Ranadeep Bhowmick
    • 1
  • Bhaskar Majumdar
    • 2
  • Dinesh K. Misra
    • 1
  • Upadrasta Ramamurty
    • 1
  • K. Chattopadhyay
    • 1
  1. 1.Department of Materials EngineeringIndian Institute of ScienceBangaloreIndia
  2. 2.Defense Metallurgical Research LaboratoryHyderabadIndia

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