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Influence of cooling rate on the structure and properties of a Cu–Zr–Ti–Ag glassy alloy

Published online by Cambridge University Press:  31 January 2011

Dmitri V. Louzguine-Luzgin ,
Takanobu Saito ,
Junji Saida  and
Akihisa Inoue
Dmitri V. Louzguine-Luzgin*
Affiliation:
Institute for Materials Research, Tohoku University, Aoba-Ku, Sendai 980-8577, Japan; and WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
Takanobu Saito
Affiliation:
Institute for Materials Research, Tohoku University, Aoba-Ku, Sendai 980-8577, Japan
Junji Saida
Affiliation:
Center for Interdisciplinary Research, Tohoku University, Aramaki, Aoba, Sendai 980-8578, Japan
Akihisa Inoue
Affiliation:
Institute for Materials Research, Tohoku University, Aoba-Ku, Sendai 980-8577, Japan
*
a) Address all correspondence to this author. e-mail: dml@imr.tohoku.ac.jp
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Abstract

The influence of the cooling rate on the structure, microhardness, relaxation, and devitrification behavior of Cu44Ag15Zr36Ti5 glassy alloy on heating is studied in the present work. According to transmission electron microscopy investigations, the structures of Cu44Ag15Zr36Ti5 glassy ribbon and bulk samples are somewhat different. The structure of the ribbon samples is amorphous while, the nanoscale clusters of the crystalline phase (highly ordered regions) are formed in the bulk samples. It is reflected in the shift of the x-ray diffraction peak, in the magnitude of the heat of structure relaxation and crystallization, as well as in the change in the Vickers microhardness. An analysis of the cooling curve is also performed.

Keywords

AlloyAmorphousRapid solidification

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Articles
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Journal of Materials Research , Volume 23 , Issue 2 , February 2008 , pp. 515 - 522
Copyright
Copyright © Materials Research Society 2007

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References

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