Atomic configuration of metal atoms in (Ti0.676Zr0.324)D0.31 metallic glass studied by X-ray, neutron diffraction and reverse Monte Carlo modeling

2007 ◽  
Vol 434-435 ◽  
pp. 180-182 ◽  
Author(s):  
K. Itoh ◽  
K. Hashi ◽  
K. Aoki ◽  
K. Mori ◽  
M. Sugiyama ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Neutron Diffraction ◽  
Metallic Glass ◽  
Reverse Monte Carlo ◽  
Atomic Configuration ◽  
Monte Carlo Modeling ◽  
X Ray ◽  
Metal Atoms

scholarly journals Atomic structure of Mg-based metallic glass investigated with neutron diffraction, reverse Monte Carlo modeling and electron microscopy

2017 ◽  
Vol 8 ◽  
pp. 1174-1182 ◽  
Author(s):  
Rafał Babilas ◽  
Dariusz Łukowiec ◽  
Laszlo Temleitner
Keyword(s):  
Electron Microscopy ◽  
Monte Carlo ◽  
Neutron Diffraction ◽  
Metallic Glass ◽  
Glassy State ◽  
Pair Correlation ◽  
Quaternary Alloy ◽  
Dark Field ◽  
Reverse Monte Carlo ◽  
Monte Carlo Modeling

The structure of a multicomponent metallic glass, Mg65Cu20Y10Ni5, was investigated by the combined methods of neutron diffraction (ND), reverse Monte Carlo modeling (RMC) and high-resolution transmission electron microscopy (HRTEM). The RMC method, based on the results of ND measurements, was used to develop a realistic structure model of a quaternary alloy in a glassy state. The calculated model consists of a random packing structure of atoms in which some ordered regions can be indicated. The amorphous structure was also described by peak values of partial pair correlation functions and coordination numbers, which illustrated some types of cluster packing. The N = 9 clusters correspond to the tri-capped trigonal prisms, which are one of Bernal’s canonical clusters, and atomic clusters with N = 6 and N = 12 are suitable for octahedral and icosahedral atomic configurations. The nanocrystalline character of the alloy after annealing was also studied by HRTEM. The selected HRTEM images of the nanocrystalline regions were also processed by inverse Fourier transform analysis. The high-angle annular dark-field (HAADF) technique was used to determine phase separation in the studied glass after heat treatment. The HAADF mode allows for the observation of randomly distributed, dark contrast regions of about 4–6 nm. The interplanar spacing identified for the orthorhombic Mg2Cu crystalline phase is similar to the value of the first coordination shell radius from the short-range order.

scholarly journals Reverse Monte Carlo modeling of the neutron and X-ray diffraction data for new chalcogenide Ge–Sb–S(Se)–Te glasses

2013 ◽  
Vol 74 (10) ◽  
pp. 1355-1362 ◽  
Author(s):  
M. Fabian ◽  
E. Svab ◽  
V. Pamukchieva ◽  
A. Szekeres ◽  
K. Todorova ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Diffraction Data ◽  
Reverse Monte Carlo ◽  
X Ray Diffraction ◽  
Monte Carlo Modeling ◽  
X Ray
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