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Gravity-driven Beryllium Transport in ZrTiCuNiBe Melt and its Influence on Glass Formation

Published online by Cambridge University Press:  03 March 2011

C. Yang ,
R.P. Liu ,
X.Y. Wang ,
Y.Z. Jia ,
M.Z. Ma ,
L.L. Sun  and
W.K. Wang
C. Yang
Affiliation:
Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao 066004, People’s Republic of China; and Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
R.P. Liu*
Affiliation:
Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao 066004, People’s Republic of China
X.Y. Wang
Affiliation:
Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao 066004, People’s Republic of China; and Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
Y.Z. Jia
Affiliation:
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China; and School of Material Science and Technology, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
M.Z. Ma
Affiliation:
Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao 066004, People’s Republic of China
L.L. Sun
Affiliation:
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
W.K. Wang
Affiliation:
Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao 066004, People’s Republic of China; and Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
*
a) Address all correspondence to this author.e-mail: chaoyang666@hotmail.com
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Abstract

Compositional and microstructural differences from bottom to top along a water-quenched Zr41Ti14Cu12.5Ni10Be22.5 alloy rod, 90 mm in length and 22 mm in diameter, were investigated experimentally by x-ray diffraction measurement, differential scanning calorimetry, and composition analysis. The results show that the upper part of the rod contains more beryllium atoms and is amorphous. The lower part with less beryllium atoms contains crystalline phases. The composition gradient is possibly due to the gravity-driven transport of Be-rich clusters and un-melted tiny solid pieces in the alloy melt.

Keywords

DiffusionMetallic glass

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Type
Articles
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Journal of Materials Research , Volume 20 , Issue 9 , September 2005 , pp. 2302 - 2306
Copyright
Copyright © Materials Research Society 2005

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