Volume 107, Number 6, September 2014
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||24 September 2014|
Structural origin of the different devitrification behaviors between ZrCu and ZrPd metallic glasses
1 Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics - Mianyang 621900, PRC
2 Key Laboratory of Neutron Physics, China Academy of Engineering Physics - Mianyang 621900, PRC
3 Department of Nuclear Science and Engineering, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics - Nanjing 210016, PRC
Received: 14 May 2014
Accepted: 5 September 2014
The microstructures of Zr70Pd30 and Zr70Cu30 metallic glasses (MGs) were investigated via the synchrotron radiation techniques combined with the reverse Monte Carlo simulations. It is revealed that, compared with Zr70Cu30, Zr70Pd30 has more fruitful icosahedral-like clusters, which have a relatively high geometrical regularity closer to that of the ideal icosahedron. Therefore, clusters in Zr70Pd30 are prone to change into the structural units of icosahedral quasicrystal phase. This should be the structural origin of the amorphous-to-quasicrystal transformation found in Zr70Pd30 while such phase change never appears when heating Zr70Cu30 MG. This work provides an understanding of the devitrification mechanism from the atomic level in this class of glassy materials.
PACS: 61.05.cj – X-ray absorption spectroscopy: EXAFS, NEXAFS, XANES, etc. / 61.43.Dq – Amorphous semiconductors, metals, and alloys / 61.43.Bn – Structural modeling: serial-addition models, computer simulation
© EPLA, 2014
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