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Structural origin of the different glass-forming abilities in ZrCu and ZrNi metallic glasses

Published online by Cambridge University Press:  29 July 2011

Gu-Qing Guo ,
Liang Yang ,
Cai-Long Huang ,
Da Chen  and
Lian-Yi Chen
Gu-Qing Guo
Affiliation:
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Liang Yang*
Affiliation:
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Cai-Long Huang
Affiliation:
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Da Chen
Affiliation:
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Lian-Yi Chen*
Affiliation:
International Center for New-Structured Materials, Zhejiang University, Hangzhou 310027, People’s Republic of China; and Laboratory of New-Structured Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China; and Department of Physics, Zhejiang University, Hangzhou 310027, People’s Republic of China
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
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Abstract

The microstructures of Zr70Cu30 and Zr70Ni30 metallic glasses (MGs) were investigated via the synchrotron radiation techniques combined with the reverse Monte-Carlo simulations. Although Cu and Ni are neighbor elements in the periodic table and their atomic radii are almost the same in length, it is found that atomic- and cluster-scale structural differences occur between these two Zr-based MGs. In particular, the relatively regular clusters caused by the narrow distributions of atomic separations and bond angles are detected in Zr70Cu30. This is the structural origin of the different glass-forming abilities in ZrCu and ZrNi alloys. This work has implications for understanding of the glass-forming mechanism in this class of glassy materials.

Keywords

Extended x-ray absorption fine structureAmorphousMetal
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 16 , 28 August 2011 , pp. 2098 - 2102
Copyright
Copyright © Materials Research Society 2011

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