Search academic texts

Information × Registration Number 0217U001038, 0116U006894 , R & D reports Title Development of high-performance vacuum-plasma methods of surface modification and deposition of nanostructured coatings for construction materials, which are used in rocket production, nuclear energy and other fields. popup.stage_title Head Zmij Viktor Ivanovych, Registration Date 17-01-2017 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 The influence of external periodic fields in time for the diffusion processes of crystal defects in solids was studied. Study based on the decisions of the stochastic Langevin equations. Created a theoretical model and calculations of accelerating the diffusion of defects in different conditions. It is shown that diffusion in a low dissipation factor systems can be enhanced by many orders by selecting the required amplitude and frequency of the external field. The frequency dependence of the gain under the influence of the diffusion fields of different amplitudes was determined. At low frequencies, the diffusion coefficient of the same as a diffusion coefficient for a constant field, while at high frequencies, the diffusion coefficient decreases as the degree of frequency. The temperature dependence of the gain of the diffusion for different values of the field amplitude at a fixed frequency of the external field was studied. It is shown that if amplitudes exceed the critical level then in the temperature dependence there is dependence of temperature and anomalous diffusion region (TAD). A comparison of gain diffusion fields with different waveform was done. It is shown that both qualitatively and on the current level, the results for the sinusoidal field close to the results obtained for the rectangular field. It is concluded that the waveform does not substantially affect the temperature dependence of the diffusion and the field frequency. Product Description popup.authors Андреєв Анатолій Опанасович Доломанов Андрій Валентинович Змій Віктор Іванович Картмазов Геннадій Миколайович Карцев Микола федорович Коваленко Володимир Іванович Ковтеба Дмитро Володимирович Кунченко Віктор Володимирович Кунченко Юрій Вікторович Маринін Володимир Григорович Мартиненко Людмила Іванівна Марченко Іван Григорович Островерх Олексій Олександрович Поляков Юрій Іванович Рижова Тетяна Петрівна Руденький Сергій Георгійович Сердюк Ірина Віталіївна Серченко Марина Павлівна Столбовий Вячеслав Олександрович Тимофєєва Єлизавета Володимирівна popup.nrat_date 2020-04-02 Close