Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/13387
Title: Thermodynamic, corrosion and mechanical properties of Zr-based bulk metallic glasses in relation to heterogeneous structures
Authors: Li, WH
Chan, KC 
Xia, L
Liu, L
He, YZ
Keywords: Bulk amorphous alloys
Corrosion resistance
Plasticity
Thermal stability
Issue Date: 2012
Publisher: Elsevier
Source: Materials science and engineering. A, Structural materials : properties, microstructure and processing, 2012, v. 534, p. 157-162 How to cite?
Journal: Materials science and engineering. A, Structural materials : properties, microstructure and processing 
Abstract: In this paper, Zr 64.2Ni 16.2Cu 14.6Al 5 and Zr 63.4Ni 16.2Cu 15.4Al 5 BMGs with heterogeneous structures were prepared through copper mold casting. The microstructure, thermal stability and corrosion behavior of the two Zr-based metallic glasses were investigated by X-ray diffraction (XRD), high-resolution transmission electron micrography (HRTEM), differential scanning calorimetry (DSC) and potentiodynamic polarization tests. In TEM micrographs, heterogeneous structures were revealed by the contrast between the bright and dark zones. Compared to the Zr 65A 10lNi 10Cu 15 BMG with a homogenous structure, the heterogeneous structures of the two BMGs are shown to reduce their thermal stability and corrosion resistance. The two Zr-based BMGs however exhibit large plastic strain (>25%) and high yield strength (>1.6GPa) under uniaxial compression tests. The low potential-energy barrier of shear transition zones (STZs) and the high resistance to the propagation of shear bands of the BMGs are related to the heterogeneous structures.
URI: http://hdl.handle.net/10397/13387
ISSN: 0921-5093
EISSN: 1873-4936
DOI: 10.1016/j.msea.2011.11.054
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