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ISSN 2413-4295 (online) в ² в ò doi:10.20998/2413-4295.2018.16.06 621.039.56 ...

ISSN 2079-5459 (print)

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ISSN 2413-4295 (online) в "² в ò"

doi:10.20998/2413-4295.2018.16.06

621.039.56

. . 1, . . 1, . . 1,2* 1 һ, - , , 2 , .. , , *email: tkachenko@kipt.kharkov.ua 400-600 C . , . , , , , . , , . , . .

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TRIBOLICAL TESTS AND PHYSICAL MODEL OF ERASING OF CARBON

MATERIALS IN THE OXIDATIVE MEDIUM AT HIGH TEMPERATURES AND

IONIZING RADIATION

A. KOMIR1, A. ODEYCHUK1, V. TKACHENKO 1,2* 1 SPE RESST, National Science Center Kharkiv Institute of Physics and Technology, Kharkiv, UKRAINE 2 School of Physics and Energy,V.N. Karazin Kharkiv National University, Kharkiv, UKRAINE

Abstract

In this paper, we describe the tribological tests of carbon materials at high temperatures (400-600 C), in an oxidizing medium and under the influence of ionizing radiation. The aim of the study is to analyze the dust formation during erasing of the same type of graphite samples. In experiments used the method developed earlier, a rapid analysis of the dependence of the change in mass of graphite powder on attrition time was carried out. It is shown that, on a logarithmic scale, the rate of change in mass of the graphite powder can be considered as linear dependence on temperature. It has been experimentally determined that with increase of experiments temperature, and under the influence of the electron beam, the graphite of MPG grade is most vulnerable to erasing wear. Grades of graphite ARV, GSP, UUKM have less wear compared to grade of graphite MPG. It isconcluded that for pores of large diameters (of the order of a micron) wear is less than for nanoscale pores. It is shown that in nano-sized range of pores the smaller the pore size, the less the erasing. On the basis of the experimental data obtained, a physical model is proposed for describing the time dynamics of reactor graphites erasing at different temperatures and under the influence of an electron beam. The physical model of nuclear graphite erasing is based on a simplified scheme of reactor graphite attrition process, which considers the process of destruction of graphites in contact boundary layer with a thickness of order of the double mean diameter of the prevailing pores. Under the assumption of an insignificant change in temperature as a result of friction, as well as the effect of an electron beam, an equation for the change in the mass of the graphite powder in time is obtained .





Keywords: nuclear graphite; tribological tests; oxidation; electron beams; erasing

   

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(About authors)

, һ, - , . , ; e-mail: anton.komir@gmail.com .

Anton Komir junior researcher, SPE RESST, National Science Center Kharkiv Institute of Physics and Technology, Kharkiv, Ukraine; e-mail: anton.komir@gmail.com .

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odeychuk@kipt.kharkov.ua .

Mykola Odeychuk Senior Scientist, Candidate of Technical Sciences (Ph. D.), SPE RESST, National Science Center Kharkiv Institute of Physics and Technology, Kharkiv, Ukraine; e-mail: odeychuk@kipt.kharkov.ua .

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, ; e-mail:

tkachenko@kipt.kharkov.ua .

Viktor Tkachenko Doctor of Science, Professor, Director of SPE RESST, NSC Kharkiv Institute of Physics and Technology; Head of the Department of Physics of Innovation Energy and Technology and Ecology, School of Physics and Energy, V.N. Karazin Kharkiv National University, Kharkiv, Ukraine; e-mail: tkachenko@kipt.kharkov.ua .

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, . . , / . . , . . , . . // Ȼ, : . : Ȼ. 2018. 16 (1292). . 41-46 .

doi:10.20998/2413-4295.2018.16.06 .

Please cite this article as:

Komir, A., Odeychuk, M., Tkachenko, V. Tribological tests and physical model of erasing of carbon materials in the oxidative medium at high temperatures and ionizing radiation. Bulletin of NTU "KhPI". Series: New solutions in modern technologies. Kharkiv: NTU "KhPI", 2018, 16 (1292), 41-46., doi:10.20998/2413-4295.2018.16.06 .

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, . . / . . , . . , . . // ³ ϲ, : . : ϲ. 2018 16 (1292). . 41-46. doi:10.20998/2413-4295.2018.16.06 .

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