Search

Your search keyword '"Kotomina, V. E."' showing total 19 results
Start Over Author "Kotomina, V. E." Language english
19 results on '"Kotomina, V. E."'

5. Formation of a Fine-Grained Si1–xGexThermoelectric by Spark Plasma Sintering.

Author

Dorokhin, M. V., Boldin, M. S., Uskova, E. A., Boryakov, A. V., Demina, P. B., Erofeeva, I. V., Zdoroveyshchev, A. V., Kotomina, V. E., Kuznetsov, Yu. M., Lantsev, E. A., Popov, A. A., and Trushin, V. N.

Subjects
DIFFUSION kinetics, SOLID solutions, PLASMA temperature, GRAIN size, SINTERING
Abstract

The kinetics of diffusion processes occurring during the formation of polycrystalline Si1 –xGex nanostructures (x = 0.20, 0.35) by spark plasma sintering in the temperature range 20–1200°C was studied for the first time. A mechanism for the formation of a SiGe solid solution is proposed as a result of a comprehensive study of the microstructure and phase composition of samples with particle sizes from 150 nm to 100 µm, together with the analysis of experimental sintering maps. It is based on the phenomenon of mutual diffusion of Si and Ge atoms that occurs during the entire sintering process. For the selected sintering modes, the grain size of the formed SiGe corresponds to the size of the initial powder particles. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

8. Thermally initiated disproportionation of manganese(II) bis(1-hydroxyethylidene)diphosphonate. Formation and properties of the lepidoid structure of manganese(II) (1-hydroxyethylidene)diphosphonate-2-hydroxyethaneaminium whiskers. Agronomical efficiency of the manganese(II) complex with (1-hydroxyethylidene)diphosphonic acid

Author

Semenov, V. V., Zolotareva, N. V., Petrov, B. I., Novikova, O. V., Kulikova, T. I., Razov, E. N., Kruglov, A. V., Kotomina, V. E., Geiger, E. Yu., Varlamova, L. D., Titova, V. I., Korchenkina, N. A., and Sakov, A. P.

Published
2018
Full Text
View/download PDF

9. Recent results of new additive technology CMPS of manufacturing elements of vacuum electronic devices.

Author

Proyavin, M. D., Morozkin, M. V., Kotomina, V. E., Zaslavsky, V. Y., Peskov, N. Y., Sobolev, D. I., and Palitsin, A. V.

Subjects
3-D printers, THREE-dimensional printing, VACUUM technology, METAL products, STEREOLITHOGRAPHY, PROBLEM solving, NUMERICAL control of machine tools, ELECTRONIC equipment
Abstract

The development of vacuum electronics is strongly correlated to advances in manufacturing technologies. The complexity of many modern prototypes of vacuum electron devices does not allow or greatly complicates their realization, and many ideas still remain theoretical. Modern 3D printing technologies can partially solve this problem, since, in comparison with modern CNC machines, they have great capabilities in accuracy, productivity and cost. However, this only applies to dielectric products, since metal 3D printers are currently significantly inferior to CNC machines in all respects. Therefore, special methods are required to realize metal products. In this paper, we propose a method for multistage chemical metallization of photopolymer structures (CMPS) printed using stereolithography technologies. Experimental testing of various elements of vacuum devices manufactured using this technology demonstrates great prospects for this approach. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results