The method of molecular dynamics is used to investigate the self-diffusion processes in the nickel lattice activated by a shock wave. It is demonstrated that the main self-diffusion mechanism is crowdion one. Ranges of shock wave velocities are established in which anomalous decrease of the self-diffusion coefficient caused by the formation of crowdion complexes is observed. In addition, it is demonstrated that when the wave velocity increases, the self-diffusion coefficients approach values corresponding to those of the metal in the liquid state, and the defect migration energy decreases. These results are compared with the data obtained for the crystal lattice with a structural defect.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 6, pp. 80–84, June, 2015.
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Markidonov, A.V., Starostenkov, M.D. & Smirnova, M.V. Self-Diffusion Process in an FCC Crystal Caused by the Passage of a Shock Wave. Russ Phys J 58, 828–832 (2015). https://doi.org/10.1007/s11182-015-0576-8
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DOI: https://doi.org/10.1007/s11182-015-0576-8