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Information × Registration Number 0225U000811, (0122U000405) , R & D reports Title Formation of the structure of polycrystalline hybrid material obtained on the basis of diamond powder and CVD-diamond metallized with metal-solvent carbon using silicon-based additives activating the sintering process popup.stage_title Формування структури полікристалічного гібридного матеріалу, одержаного на основі алмазного порошку та CVD-алмазу металізованого металом-розчинником вуглецю з використанням активуючих процес спікання добавок на основі кремнію Head Sokolov Oleksandr M., к.т.н. Registration Date 19-01-2025 Organization V. Bakul Institute of superhard material of the National Academy of Sciences of Ukraine popup.description1 Study of the formation of the structure of polycrystalline hybrid material obtained by sintering at high pressures and temperatures of diamond powder and CVD-diamond metallized with metal-solvent carbon, using silicon-based sintering activating additives and based on scientific results of hybrid composite diamond-containing materials . popup.description2  The influence of carbon materials concentration of different nature on the formation of diamond-containing polycrystalline materials under HPНT was studied. It was established that the addition of n-layer graphenes less than 0.2% of the mass of diamond powders will be insufficient to reduce the interparticle friction necessary for compaction of diamond particles. At an additive content of more than 0.7%, excessive carbon residues appear during sintering under pressure, which reduce the strength and wear resistance of composites. The influence of SiC additives activating the sintering process on the formation of a polycrystalline shell of a diamond hybrid material under HPНT was studied. Increasing proportion of defective diamond grains with carbide veins is observed in composites obtained with nanoSiC additions, which ensures an increase in the length of SiC framework in the shell. The formation of the structure of diamond polycrystalline hybrid materials with activating graphene additives was studied. The densest structure was obtained using nanographene and graphene with a number of layers of no more than four. Structural studies of polycrystalline diamond composites with a hybrid diamond base consisted of a CVD diamond insert and a polycrystalline diamond shell around it were carried out. It was shown that the coating on the CVD diamond insert in combination with graphene additives in the polycrystalline shell allows to obtain a dispersion-strengthened composite of increased strength. Wear resistance tests of the hybrid diamond composites showed that the wear intensity of the material with CVD diamond, metallized titanium, is 35% lower than that of the material without spraying. The addition of graphene to the charge and spraying of CVD diamond with titanium makes it possible to obtain materials with a 60% lower wear intensity than that of CVD diamonds without spraying. Product Description popup.authors Bilorusets Viktor V. Bezhenar Mykola P. Bondar Ivan V. Hazha Heorhii P. Harhin Vladyslav H. Horokhov Viacheslav Yu. Osipov Oleksandr S. Patsyk Andrii M. Petrov Ihor V. Petrusha Ihor A. Romanenko Yaroslav M. Rusinova Nataliia O. Smirnova Tamara I. Staryk Serhii P. Stasiuk Liubomyr P. Stratiichuk Denys A. Trokhanchuk Vasyl V. Turkevych Volodymyr Z. Fedak Fedir V. Shokina Liudmyla P. Shulzhenko Alla O. popup.nrat_date 2025-01-19 Close