By a News Reporter-Staff News Editor at Physics Week -- Fresh data on Nanocrystals are presented in a new report. According to news reporting originating from Ulyanovsk, Russia, by VerticalNews correspondents, research stated, "The molecular dynamics method is used to simulate the nanosized UO2 crystals. The phase-transition temperatures are calculated for the nanosized crystals of the uranium dioxide."
Our news editors obtained a quote from the research from Ulyanovsk State University, "It is demonstrated that the melting point and the temperature of the transition to the superionic state (melting of the anion sublattice) of the crystals decrease with decreasing sizes. In particular, melting point (T (m) similar to 2300 K) for the cubic nanocrystal with a size of 3.3 nm is lower than the melting point of the single crystal by almost 1000 K. The calculated surface energies are in agreement with the experimental results. The dependence of the surface energy on the size of the UO2 nanocrystals is obtained. The effect of the nanocrystal temperature on the surface energy is studied. The temperature dependence of the thickness of the melt layer is obtained in the framework of the model of the heterogeneous melting."
According to the news editors, the research concluded: "The parameters and dependences can be used for the further analysis of the microstructure properties of nuclear fuel in working systems."
For more information on this research see: Molecular dynamics simulation of the surface properties of nanocrystalline uranium dioxide. Technical Physics, 2013;58(8):1094-1099. Technical Physics can be contacted at: Maik Nauka, Interperiodica, Springer, 233 Spring St, New York, NY 10013-1578, USA. (Pleiades Publishing - www.maik.ru)
The news editors report that additional information may be obtained by contacting R.Y. Makhmud-Akhunov, Ulyanovsk State Univ, Ulyanovsk 432970, Russia. Additional authors for this research include M.Y. Tikhonchev and V.V. Svetukhin.
Keywords for this news article include: Russia, Eurasia, Physics, Uranium, Ulyanovsk, Nanotechnology, Nanocrystalline, Molecular Dynamics, Emerging Technologies, Actinoid Series Elements
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