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

Bhowmick, Ranadeep and Majumdar, Bhaskar and Misra, Dinesh K and Ramamurty, Upadrasta and Chattopadhyay, K (2007) Synthesis of bulk metallic glass composites using high oxygen containing Zr sponge. In: Journal of Materials Science, 42 (22). pp. 9359-9365.

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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 (\sim 8000 ppm) spawns additional phases. In particular, we report the appearance of \alpha-Zr, dendritic $Zr_2Cu$ phase and the $Zr_2Ni$ 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.

Item Type: Journal Article
Publication: Journal of Materials Science
Publisher: Springer
Additional Information: Copyright of this article belongs to Springer
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 01 Aug 2008
Last Modified: 19 Sep 2010 04:48
URI: http://eprints.iisc.ac.in/id/eprint/15413

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