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Information × Registration Number 0220U001362, 0116U005057 , R & D reports Title Development of fundamentals of the thermogradient gas-phase pyrolysis methods (TG-CVI) resistant for creation of the radiation, corrosion- and erosion-resistant - composite materials with carbon and ceramic matrix for the needs of the nuclear, missile, space and aeronautical engineering, mechanical engineering, medicine, etc. popup.stage_title Head Gurin Igor Vyacheslavovіch, Registration Date 12-03-2020 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 The data on the effectiveness of carbon-carbon composite materials (CCC) and metals (welding, soldering) methods, selective metallization techniques that provide high mechanical and electrical properties in the connection zone are investigated. It is shown that the proposed method of soldering CCC using an intermediate layer of galvanically deposited copper provides the strength of the connection at the level of strength of the solder and, in the case of high-temperature solders, is at the level of the yield strength of copper. It is shown that the proposed method of direct welding with titanium provides the strength of the connection, close to the mechanical strength of CCC. It has been experimentally shown that even at negligible temperatures (900-1100 °C), during the pyrolysis process, a significant saturation of the surface layers of molybdenum and tungsten with carbon is observed, with the formation of a carbide layer 1-2 mm. The carbide layer formed is brittle and does not provide reliable fixation of the metal in the carbon material. The migration of metal (tungsten, molybdenum, iron, etc.) into the adjacent layers of the carbon composite is also observed. This migration is well visualized by X-ray computed tomography. Product Description popup.authors Аулова Олена Семенівна Буколов Олександр Миколайович Грибанов Юрій Олександрович Гуйда Віктор Васильович Гуйда Юлія Василівна Гурін Ігор Вячеславович Завалішин Анатолій Андрійович Колосенко Віктор Васильович Корж В'ячеслав Михайлович Кравцов Ярослав Валерійович Ляшенко Сергій Олексійович Петров Валерій Борисович Фурсов Сергій Геннадійович popup.nrat_date 2020-10-01 Close