Atomic structure of Ca–Mg biodegradable metallic glass
| Autor: | Beáta Ballóková, Karel Saksl, Miloš Fejerčák, L. Kapuscinský, Štefan Michalik, Maksym Lisnichuk, László Temleitner, Yu. Katuna, Vladimír Girman, Juraj Ďurišin, Pál Jóvári, Andrea Lachová, Zuzana Molčanová, Katarína Šuľová, M. Šuliková |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Amorphous metal
Materials science Mechanical Engineering Neutron diffraction Alloy Metals and Alloys 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Atomic packing factor 01 natural sciences 0104 chemical sciences Crystal Condensed Matter::Materials Science Crystallography Mechanics of Materials Phase (matter) ddc:540 Materials Chemistry Tetrahedron engineering 0210 nano-technology Eutectic system |
| Zdroj: | Journal of alloys and compounds 801, 651-657 (2019). doi:10.1016/j.jallcom.2019.06.120 |
| DOI: | 10.3204/pubdb-2019-05121 |
| Popis: | Journal of alloys and compounds 801, 651 - 657 (2019). doi:10.1016/j.jallcom.2019.06.120 Very low density eutectic Ca72Mg28 at.% alloy is a precursor of complex biodegradable alloys with potential use as bioresorbable alloy for orthopaedic applications. The structure of the amorphous alloy was investigated by using X-ray, neutron diffraction and reverse Monte Carlo (RMC) modelling. The RMC configuration was decomposed into polyhedral holes whose faces are all triangles consisting of chemical bonds. Free volumes in the respective polyhedral holes were evaluated with reference to the packing efficiency of crystalline CaMg2 HCP phase. The tetrahedral holes, accounting for about 55% of the whole space, are regarded as densely packed units because the average packing efficiency of them is approximately equal to that of the corresponding crystal phase. At the same time, various types of polyhedral holes which have a certain free volume have been observed, and some of them are connected with each other. The densely packed coordination polyhedra consisting only of tetrahedral holes tend to be clustered Published by ScienceDirect, Amsterdam [u.a.] |
| Databáze: | OpenAIRE |
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