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Information × Registration Number 0224U002044, 0121U109441 , R & D reports Title The use of non-traditional methods of obtaining nanopowders and sintering in the development of modified mulito-ZrO2 ceramics resistant to heat shock popup.stage_title Head Hevorkian Edvin S., Доктор технічних наук Registration Date 05-02-2024 Organization Ukrainian State University of Railway Transport popup.description2 The object of research: processes of obtaining nanocomposite materials by electroconsolidation based on mullite-corundum powders, synthesized nanopowders of partially stabilized zirconium dioxide and silicon carbide. The subject of research: nanopowders ZrO2–3 wt.% Y2O3 synthesized using hydrofluoric acid HF, concentrated nitric acid HNO3, aqueous ammonia solution NH4OH, metal zirconium, mullite-corundum, SiC nanopowders. The purpose of research: creation of a composite material based on mullite-corundum with high thermomechanical properties and crack resistance due to the use of nanoadditives of partially stabilized zirconium dioxide and the method of hot pressing with direct passage of electric current. Research methods and equipment: the formation of ceramic products was carried out by the method of electroconsolidation due to the use of a device for hot vacuum pressing; polishing of samples – at the Struers complex using diamond pastes; research of the structure – by force probe (Ntegra Aura) and raster (Nova NanoSEM, Quanta 200 3D) microscopy methods; AFM scanning – semi-contact method in air; chemical analysis – with a LEO1455 VP microscope with INCAEnergy-300 blocks; X-ray phase analysis – with a Shimadzu XRD-6000 diffractometer; phase analysis – using the ASTM database; determination of microhardness and crack resistance – with the AFFRI DM8 microhardness tester. Results and their novelty: the defined regularities of the influence of the amount of nano-ZrO2(Y2O3) additives on Al2O3–SiO2 synthesized by the method of decomposition of fluoride salts on the microstructure and physical and mechanical properties of composites, the peculiarities of the synergistic effect of consolidation modes on structural-phase transformations in composites based on partially stabilized by yttrium oxide zirconium dioxide during hot pressing with direct current passage and during operation, which became a prerequisite for obtaining materials with increased resistance to wear. Product Description popup.authors Borziak Olha S. Voloshyna Liudmyla V. Halahuria Yevhenii I. Hordiienko Denys A. Zinchenko Olena Ye. Zvierieva Alina S. Kalinin Oleh A. Komarova Hanna L. Kravtsiv Larysa B. Lebedynskyi Oleksii M. Lobyk Oleksii V. Morozova Oksana M. Nerubatskyi Volodymyr P. Novikova Mariia A. Panchenko Serhii V. Partala Nataliia M. Petrushenko Serhii I. Pluhin Andrii A. Dmytro A. Pluhin Podoprigora Irina O. Ravlyuk Vasyl H. Tsybulnyk Vladyslav R. Chyshkala Volodymyr O. Shevchenko Iryna I. Shkurpela Olexandra V. popup.nrat_date 2024-02-05 Close