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Borodin, V.A.,Sidorov, V.V.,Steriopolo, T.A. The Korea Association of Crystal Growth 1999 韓國結晶成長學會誌 Vol.9 No.4
Detailed description of the crystal growth methods permitting one to obtain complicated shape crystals from the melt is given. The variable shaping technique provides the growth of crystals with a discrete altering cross-section configuration during crystallization. The dynamic local shaping technique enables one to grow items with a continuous alteration of the side surface profile by a preset program.
Borodin, A.V.,Borodin, V.A.,Petkov, I.S.,Sidorov, V.V. The Korea Association of Crystal Growth 1999 韓國結晶成長學會誌 Vol.9 No.4
New method of control based upon a physical model of the Stepanov growth technique has been developed. The controller keeps the system stable and completely denies operator's interference into the process. The system demonstrates very reliable results under commercial production of shaped sapphire crystals.
Computer modeling of a multi-run growth technique for sapphire ribbons
A.V.Borodin,V.A.Borodin,A.V.Zhdanov,I.S.Petkov 한양대학교 세라믹연구소 2003 Journal of Ceramic Processing Research Vol.4 No.2
Multi-run growth is most commonly applied to provide a high yield of shaped crystals. The presence of several crystals in a melting zone and a radiative heat exchange between them pose difficulties in the optimization of the heat zone design and growth conditions. The trial-and-error experiments can hardly be applied because of high cost in terms of materials and time. Moreover, the presence of many parameters under consideration and their interaction make a tentative search a very arduous task. In this paper, the multi-run growth process for sapphire ribbons is studied on the basis of mathematical modeling and the optimized relationships are found.
Wave attenuation in microcrystal copper at irradiation by a powerful electron beam
E.N. Borodin,A.E. Mayer,V.S. Krasnikov 한국물리학회 2011 Current Applied Physics Vol.11 No.6
The numerical study of high-rate plasticity of Cu target with different grain sizes under the action of nanosecond relativistic high-current electron beam has been carried out in the paper. The model of microcrystal material plasticity includes dislocation kinetics and dynamics as well as the stress relief in the grain boundaries of the polycrystal. This model has only two adjustable parameters. The presented results demonstrate a strong dependence of the shock wave attenuation coefficient on the grain size. At the grain size of about 70 nm, the plasticity mechanism of the dislocation glide inside grains changes to plasticity mechanism along grain boundaries.