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Information × Registration Number 0216U000979, 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 22-03-2016 Organization Institute of Pulse Research and Engineering popup.description2 The target of the research is dispersed powder mixtures of of iron, titanium and boron carbide, and the iron-carbon alloy system - carbide (diboride) titanium, super-hard and carbon-containing powders. The studies were conducted using mathematical modeling, registration of fast electric and hydrodynamic processes, x-ray diffraction and elemental x-ray microanalysis, quantitative metallographic analysis. The methods are developed, and the techniques are elaborated for obtaining polydisperse micro - and nanosized powders of the iron-carbon alloys system - titanium carbide (diboride) and super-hard and carbon powders by high-voltage electrodischarge treatment. For the first time the main regularities of alloy formation during the high-voltage electrodischarge treatment of mixtures of elemental powders of Fe - Ti - C -(B) in kerosene at a concentration of powder from 1/3 to 1/60 kg/dm3 are established. The most effective modes of dispersion of powders are determined that allow changing the average diameter of powders from 80 to 3 microns and synthesizing TiC and FeB reinforcing phases, the size of which ranges from 10 to 600 nm. Methods of the high-voltage electrodischarge treatment of diamond micro-powders ASM 20/14 allow changing all morphometric characteristics when the particle size is less than 1 µm and increasing the adsorption capacity by 15%, increasing the porosity and the pore size 2.5 times, reducing the content of impurities 2.9 times and the specific magnetic susceptibility 2.8 times, increasing the abrasive ability of the powder to 14.5% and enhancing its resistance to oxidation by atmospheric oxygen. It is established that the methods of the high-voltage electrodischarge treatment of carbon nanotubes (CNT) lead to an increase up to 5 times of the surface area of CNT granules of three size ranges: from 0.118 to 0.139 µm, from 2.639 to 20.895 µm and from 2.44 to 33.701 µm with a reduced content of amorphous carbon in the middle layer compared to the source material. The check of functionalities of the designed and manufactured spark-plasma sintering complex in consolidation of powder mixtures of the Fe - Ti - C - (B) system of a varied mass profile showed that the consolidated material maintains the ultrafine grain structure, and the material features high hardness and wear resistance Product Description popup.authors Івлієв А. Жданов А. Зайченко А.Д. Коваленко О.О. Конотоп С.В. Липян Є.В. Литвинов В.В. Присташ М.С. Тафтай Е.І. Торпаков А.С. Трегуб В.О. popup.nrat_date 2020-04-02 Close