On the effect of heating and cooling rates on the melting and crystallization of metal nanoclusters
| Autor: | I. V. Talyzin, M. V. Samsonov, V. M. Samsonov |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Nanoparticle Thermodynamics chemistry.chemical_element 010403 inorganic & nuclear chemistry 01 natural sciences Isothermal process 0104 chemical sciences law.invention Nanoclusters Amorphous solid Nickel Hysteresis chemistry law Aluminium 0103 physical sciences Crystallization 010306 general physics |
| Zdroj: | Technical Physics. 61:946-949 |
| ISSN: | 1090-6525 1063-7842 |
| Popis: | The effect of heating and cooling rates on melting (Tm) and crystallization (Tc) temperatures of metal nanoclusters is investigated in terms of the isothermal molecular dynamics. We report on the results obtained for nickel nanoclusters, although analogous results were also obtained for gold and aluminum nanoclusters. It is found that Tm increases, while Tc decreases with increasing heating and cooling rates, both Tm and Tc tending to the same value for heating and cooling rates tending to zero. The results indicate that the hysteresis of melting and crystallization of nanoparticles must be completely due to nonequilibrium conditions of heating and cooling. The transition of Ni nanoclusters to the amorphous state begins at very high cooling rates exceeding 10 TK/s. |
| Databáze: | OpenAIRE |
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