polyhedral analysis
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2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kaifeng Zheng ◽  
Suyue Yuan ◽  
Horst Hahn ◽  
Paulo S. Branicio

AbstractNanoglass (NG) as a new structure-tunable material has been investigated using both experiments and computational modeling. Experimentally, inert gas condensation (IGC) is commonly employed to prepare metallic glass (MG) nanoparticles that are consolidated using cold compression to generate an NG. In computational modeling, various methods have been used to generate NGs. However, due to the high computational cost involved, heretofore modeling investigations have not followed the experimental synthesis route. In this work, we use molecular dynamics simulations to generate an NG model by consolidating IGC-prepared Cu64Zr36 nanoparticles following a workflow similar to that of experiments. The resulting structure is compared with those of NGs produced following two alternative procedures previously used: direct generation employing Voronoi tessellation and consolidation of spherical nanoparticles carved from an MG sample. We focus on the characterization of the excess free volume and the Voronoi polyhedral statistics in order to identify and quantify contrasting features of the glass-glass interfaces in the three NG samples prepared using distinct methods. Results indicate that glass-glass interfaces in IGC-based NGs are thicker and display higher structural contrast with their parent MG structure. Nanoparticle-based methods display excess free volume exceeding 4%, in agreement with experiments. IGC-prepared nanoparticles, which display Cu segregation to their surfaces, generate the highest glass-glass interface excess free volume levels and the largest relative interface volume with excess free volume higher than 3%. Voronoi polyhedral analysis indicates a sharp drop in the full icosahedral motif fraction in the glass-glass interfaces in nanoparticle-based NG as compared to their parent MG.


Author(s):  
Francesco Carrabs ◽  
Raffaele Cerulli ◽  
Ciriaco D’Ambrosio ◽  
Federica Laureana
Keyword(s):  

2020 ◽  
Vol 35 ◽  
pp. 100551
Author(s):  
Pierre Laroche ◽  
Franc Marchetti ◽  
Sébastien Martin ◽  
Anass Nagih ◽  
Zsuzsanna Róka

2019 ◽  
Vol 256 ◽  
pp. 11-37 ◽  
Author(s):  
D. Cornaz ◽  
Y. Magnouche ◽  
A.R. Mahjoub ◽  
S. Martin

2019 ◽  
Vol 273 (2) ◽  
pp. 452-463 ◽  
Author(s):  
Tolga Bektaş ◽  
Luis Gouveia ◽  
Antonio Martínez-Sykora ◽  
Juan-José Salazar-González

2018 ◽  
Vol 36 (3) ◽  
pp. 1074-1101
Author(s):  
Mohammed-Albarra Hassan ◽  
Imed Kacem ◽  
Sébastien Martin ◽  
Izzeldin M. Osman

Author(s):  
Ibrahima Diarrassouba ◽  
Meriem Mahjoub ◽  
A. Ridha Mahjoub ◽  
Hande Yaman

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