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Synthesis and Viscoelasticity of Zr-based Bulk Glassy Alloy Containing ZrC Particles

Published online by Cambridge University Press:  17 March 2011

Hidemi Kato ,
Tomoya Hirano ,
Akihisa Inoue ,
Yoshihito Kawamura  and
H. S. Chen
Hidemi Kato
Affiliation:
Institute for Materials Research, Tohoku University, 2-1-1, Katahira, Sendai 980-8577, Japan
Tomoya Hirano
Affiliation:
Institute for Materials Research, Tohoku University, 2-1-1, Katahira, Sendai 980-8577, Japan
Akihisa Inoue
Affiliation:
Institute for Materials Research, Tohoku University, 2-1-1, Katahira, Sendai 980-8577, Japan
Yoshihito Kawamura
Affiliation:
Department of Mechanical Engineering and Materials Science, Kumamoto University, 2-39-1, Kurokami, Kumamoto 860-8555, Japan
H. S. Chen
Affiliation:
Bell Laboratories, Lucent Technology, Murray Hill, New Jersey, 07974
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Abstract

Cylindrical composite Zr55Al10Ni5Cu30 bulk glassy alloys containing up to 17.5 vol.% ZrC particles were prepared with using an in-situ reaction forming ZrC between graphite particles with diameters of ∼10 m and Zr metal in molten alloy during arc-melting followed by copper mold casting. Because the in-situ reaction suppresses an agglomeration and segregation among dispersoids in the glassy matrix, mechanical properties of the composite materials at room temperature, especially toughness and plastic elongation, were significantly improved from the Zr55Al10Ni5Cu30 single glassy phase. In order to demonstrate the influence of the dispersed ZrC particles on workability of the supercooled liquid of the alloy, viscous flow behaviors under constant strain-rates were investigated. Although the Newtonian viscosity becomes larger, the composite material has the same viscoelastic properties, i.e., “shear thinning”, and excellent workability as the single glassy phase in spite of the dispersed particles.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 644: Symposium L – Supercooled Liquid, Bulk Glassy and Nanocrystalline State of Alloys , 2000 , L11.9
Copyright
Copyright © Materials Research Society 2001

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