621.762

The study describes the properties of the protective coating deposited on the surface of the reaction-sintered silicon carbide and molybdenum disilicide. The technology of increasing the protective ability of the coating of products deposited on the surface on the basis of reactive sintered carbide of silicon and molybdenum disilicide, which operate in an oxidizing environment at high temperature and a sharp change of thermal regime, is investigated. The obtained results showed that the presence of a protective slip layer significantly increases the stability of the deposited silicoboride coating, thus blocking the interaction of silicon hexaboride with the environment, slowing down almost all diffusion processes at the transition of the interaction of diffusion. It has been established that the simultaneous use of both diffusion and slurry coatings enables maximum protection of reaction-sintered ceramic materials based on silicon carbide and molybdenum disilicide against high-temperature gas corrosion. The developed coating ensures maximum resistance to repeated changes in temperature conditions, while cyclic changes destroy products of silicon carbide and molybdenum disilicide without applied protective coating. The proposed protective coating can be recommended for the protection of reaction-sintered ceramic materials operated in high temperatures.

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8. Kozlov L., Polishchuk L., Piontkevych O., Horbatiuk R., Korinenko M., Komada P., Orazalieva S., Ussatova O. Experimental researchcharacteristics of counterbalance valve for hydraulic drive control system of mobile machine. Przegląd elektrotechniczny. ISSN 0033-2097. R. 95. 2019. No. 4. Р. 104–109.
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11. Kovbashyn V., Bochar I. (2017) The study of technologies to improve physical-mechanical and chemical properties of reaction sintered ceramic materials on the basis of silicon carbide. Scientific Journal of TNTU (Tern.). Vol. 86. No. 2. Р. 14–20.

1. Buketov A., Stukhlyak P., Maruschak P., Panin S., Menou A. Regularities of impact failure of epoxy composites with Al₂O₃ microfiller and their analysis on the basis of external surface layer concept. Key Engineering Materials. 712. 2016. P. 149–154.
2. Kovbashyn V. I., Bochar I. Y. Perspective directions to increase heat tolerance of silicone carbid and molybdenum disilicide based materials. Visnyk Ternopil's'koho natsional'noho tekhnichnoho universytetu. Ternopil. Vol. 82. No. 2. 2016. P. 49–55. [In Ukrainian].
3. Buketov A., Stukhlyak P., Maruschak P., Panin S., Menou A. Physical and chemical aspects of formation of epoxy composite material with microfilling agent. Key Engineering Materials. 712. 2016. Р. 143–148.
4. Kovbashyn V. I., Bochar I. Y. Tekhnolohichni osoblyvosti formuvannya sylitsydnoho pokryttya na karbidi kremniyu ta dysylitsydi molibdenu, Visnyk Ternopil's'koho natsional'noho tekhnichnoho universytetu. Ternopil', Vol. 75. No. 3. 2014. P. 127–131. [In Ukrainian].
5. Stukhlyak P. D., Holotenko O. S., Dobrotvor I. H., Mytnyk M. M. Investigation of the adhesive strength and residual stresses in epoxy composites modified by microwave electromagnetic treatment. Materials Science. 51 (2). 2015. Р. 208–212.
6. Kovbashyn V. I., Bochar I. Y. Sposib obrobky reaktsiyno-spechenykh vyrobiv na osnovi karbidu kremniyu ta dysylitsydu molibdenu. Visnyk Ternopil's'koho natsional'noho tekhnichnoho universytetu, Ternopil'. Vol. 90. No. 2. 2018. P. 87–92. [Іn Ukrainian].
7. Stukhlyak P. D., Buketov A. V., Panin S. V., Kornienko L. A., Lyukshin B. A. Structural fracture scales in shock-loaded epoxy composites. 2015. Physical Mesomechanics. 18 (1). Р. 58–74.
8. Kozlov L., Polishchuk L., Piontkevych O., Horbatiuk R., Korinenko M., Komada P., Orazalieva S., Ussatova O. Experimental researchcharacteristics of counterbalance valve for hydraulic drive control system of mobile machine. Przegląd elektrotechniczny. ISSN 0033-2097. R. 95. 2019. No. 4. Р. 104–109.
9. Kovbashyn V. I., Bochar I. Y. Vplyv tekhnolohiyi sylikoboruvannya keramichnykh materialiv na vlastyvosti zakhysnykh pokryttiv. Visnyk Ternopil's'koho natsional'noho tekhnichnoho universytetu. Ternopil'. Vol. 78. No. 2. 2015. P. 130–138. [In Ukrainian].
10. Kovbashyn V., Bochar I. (2019) Method of reaction-sintered products processing based on silicon carbide and molibdenum disilicide. Scientific Journal of TNTU (Tern.). Vol. 94. No. 2. Р. 75–79.
11. Kovbashyn V., Bochar I. (2017) The study of technologies to improve physical-mechanical and chemical properties of reaction sintered ceramic materials on the basis of silicon carbide. Scientific Journal of TNTU (Tern.). Vol. 86. No. 2. Р. 14–20.