Journal
DOKLADY PHYSICS
Volume 64, Issue 5, Pages 214-217Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S1028335819050069
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Funding
- Russian Science Foundation [16-13-10431]
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The critical cooling rates at which pure metals Mg, Al, Ti, Fe, Co, Ni, Cu, Zr, Mo, Pd, Ag, Ta, W, Pt, Au, and Pb transit to an amorphous state (vitrify), have been calculated for some alloys using the method of molecular dynamic modeling. These rates range from 7.9 x 10(11) for Al to 3.8 x 10(13) for Zr. The atomic structures formed at different cooling rates are described. The temperature dependence of the specific volume is studied in the process of both glass transition and crystallization. The study of the thermal stability of metallic glasses has shown that the best stability is inherent in Fe, Mo, Ta, and W. Some estimates are given for the maximum radius of a melt drop, which can be cooled at the rate . The comparison of the modeling results with the experimental data, which are currently known for Ta, Mo, and W, shows their good agreement.
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