Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29019
Title: Isothermal internal friction behaviour of a Zr based bulk metallic glass with large supercooled liquid region
Authors: Wang, Q
Lu, J
Gu, FJ
Xu, H
Dong, YD
Issue Date: 2006
Publisher: Iop Publishing Ltd
Source: Journal of physics d : applied physics, 2006, v. 39, no. 13, 33, p. 2851-2855 How to cite?
Journal: Journal of Physics D: Applied Physics 
Abstract: In this paper, the internal friction behaviour of Zr-Ti-Cu-Ni-Be bulk metallic glass (BMG) containing 2 at% Fe at elevated temperatures has been studied in isothermal dynamic mechanical analysis experiments. The experiments lead to the determination of metastable equilibrium internal friction , as a function of temperature, which can be well described by the Maxwell model with viscosity, η(T), following a Vogel-Fulcher-Tammann (VFT) relation or Arrehnius law. Comparison with the Zr-Ti-Cu-Ni-Be glass-forming liquid shows that a small addition of Fe results in a stronger liquid behaviour of the alloy, exhibiting a higher strength parameter as well as lower VFT temperature and therefore correlates better glass forming ability and thermal stability. From the isothermal internal friction data, the activation energies for viscous flow and primary crystallization of the Zr based supercooled metallic liquid are also derived. It is found that the former is comparable to the activation energy controlling the diffusion process of atoms, e.g. the Ni element of medium size and higher mobility among the components of this alloy, while the latter to that of atoms, e.g. the Ti element of larger size and lower mobility. Thus, it is proposed that both isothermal viscous flow and primary crystallization of the alloy in the supercooleld liquid region are atom diffusion-controlled processes. However, the dominating atomic species are different from each other in the multicomponent Zr based BMG.
URI: http://hdl.handle.net/10397/29019
ISSN: 0022-3727
DOI: 10.1088/0022-3727/39/13/033
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

7
Last Week
0
Last month
0
Citations as of Jun 17, 2017

WEB OF SCIENCETM
Citations

7
Last Week
0
Last month
0
Citations as of Jun 22, 2017

Page view(s)

37
Last Week
2
Last month
Checked on Jun 18, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.