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Glassy and icosahedral phases in rapidly solidified Ti-Zr-Hf-(Fe, Co orNi) alloys

Chen, N and Louzguine-Luzgin, DV and Ranganathan, S and Inoue, A (2005) Glassy and icosahedral phases in rapidly solidified Ti-Zr-Hf-(Fe, Co orNi) alloys. In: Journal of Non-crystalline Solids, 351 (30-32). pp. 2547-2551.

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Abstract

The icosahedral quasicrystalline, amorphous plus crystalline and glassy phases were formed in $Ti_{40}Zr_{20}Hf_{20}(3d-LTM)_{20}$ alloys (3d-LTM = 3d late transition metals Fe, Co and Ni). The icosahedral phase formed in the melt-spun $Ti_{40}Zr_{20}Hf_{20}Fe_{20}$ alloy is metastable and the average size ofthe quasicrystalline icosahedral particles precipitated in the amorphous matrix is 5 nm. The metastable icosahedral phase transformed to a big-cubic fcc $Hf_{2}Fe$ phase with the grain size of about 20 nm after annealing for 1.8 ks at 841 K. The glassy phase was formed in the melt-spun $Ti_{40}Zr_{20}Hf_{20}Co_{20}$ alloy and no metastable phase was found to form during the transformation from glassy phase to a stable crystalline phase. Icosaheadral phase formed in the melt-spun $Ti_{40}Zr_{20}Hf_{20}Ni_{20}$ alloy transformed to a big-cubic fcc $(Zr,Ti)_{2}$ Ni solid solution phase by a solid state reaction.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Elsevier.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 11 Oct 2005
Last Modified: 19 Sep 2010 04:20
URI: http://eprints.iisc.ernet.in/id/eprint/3816

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