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Information × Registration Number 0214U007129, 0113U000625 , R & D reports Title Development of the methods of dispersion, activation of super-hard and carbon containing powders and synthesis of composite ultra-disperse Fe and Ti carbide and boride powders by high-concentration energy flows popup.stage_title Head Suzonenko Olga Mukolayivna, Registration Date 22-04-2014 Organization Institute of Pulse Research and Engineering popup.description2 The study focuses on the elementary powders of iron and titan of the system of the iron-carbon alloy - titan carbide, micropowders of the diamond powder АСМ 20/14. To fulfill the study the test-bed and the discharge chamber were modernized to provide the conditions for the reduction of chemical pollution of powders during treatment. The influence of the high-voltage electrical discharge on the processes of dispersion and activation of Fe and Ti powders and micropowders of diamond АСМ 20/14 is explored. It is fixed during the experiments that the average diameter of particles of powders monotonously decreases within a range of specific energy values from 10 MJ/kg, and after achievement of values to 30 MJ/kg the energy increase does not lead to the considerable change of dispersion. Experimental researches have shown that the high-voltage electrical discharge treatment of the surfactants in water and water solutions leads to the fining of micropowders of the diamond powder АСМ 20/14, smaller sizes of particles of a micropowder, increase of the specific surface and a considerable change of both quality and quantity of micropowder particle distribution with respect to sizes. When the current rise rate increases from 11 to 30 GA/s at the constant specific energy of treatment 40 MJ/kg, all morphometric characteristics of diamond micropowders АСМ 20/14 change. It is established that the high-voltage electrical discharge treatment of Fe and Ti powders leads to their carbidization and removal of oxide-coated films from a surface of particles. Intensity of these processes raises with the increase of the specific energy of treatment from 10 to 40 MJ/kg at the current rise rate of 25 GA/s. With the increase of the current density the processes of carbidization of Ti powders are intensified to form the maximum (over 40 %) quantity of particles (by an example of the titan) in a range from 0.1 to 10 microns of which about 50 % is the titan carbide in the conductive channel. The technological unit of the test-bed complex for the spark-plasma sintering of disperse compositions is developed to provide the atmospheric protection (vaccumized sintering area in a vacuum chamber) equipped with the vacuum and mechanical pressure systems, and the system of cooling of contacts and wireways. Elements of the electrical supply for the technological unit are developed. Product Description popup.authors Івлієв А. Жданов А. Зайченко А. Коваленко А. Конотоп С. Липян Є. Литвинов В.В. Присташ М. Тафтай Е.І. Торпаков А.С. Трегуб В. popup.nrat_date 2020-04-02 Close