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Solid-state phase separation in Zr–Y–Al–Co metallic glass

Published online by Cambridge University Press:  31 January 2011

Byung Joo Park ,
Sung Woo Sohn ,
Do Hyang Kim ,
Hee Tae Jeong  and
Won Tae Kim
Byung Joo Park
Affiliation:
Department of Metallurgical Engineering, Center for Noncrystalline Materials, Yonsei University, Seoul 120-749, Korea
Sung Woo Sohn
Affiliation:
Department of Metallurgical Engineering, Center for Noncrystalline Materials, Yonsei University, Seoul 120-749, Korea
Do Hyang Kim*
Affiliation:
Department of Metallurgical Engineering, Center for Noncrystalline Materials, Yonsei University, Seoul 120-749, Korea
Hee Tae Jeong
Affiliation:
BK21 Division of Humantronics Information Materials, Yonsei University, Seoul 120-749, Korea
Won Tae Kim
Affiliation:
Division of Applied Science, Chongju University, Chongju 360-764, Korea
*
a)Address all correspondence to this author. e-mail: dohkim@yonsei.ac.kr
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Abstract

The present study shows that the as-melt-spun Zr28Y28Al22Co22 amorphous ribbon undergoes solid-state phase separation into Zr- and Y-rich regions when heated below the glass transition temperature (Tg). Dynamic mechanical measurements show that two types of low-temperature relaxation occur below Tg, and transmission electron microscopy observation confirms the solid-state phase-separated microstructure. The diffusion coefficient of solid-state phase separation is calculated by the measured separation distance.

Keywords

AmorphousDiffusionPhase transformation

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Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 3 , March 2008 , pp. 828 - 832
Copyright
Copyright © Materials Research Society 2008

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References

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