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Information × Registration Number 0222U000027, 0121U113789 , R & D reports Title Research and development of nanostructured microwave composites with enhanced wear resistance popup.stage_title Head Zghalat-Lozynskyi Ostap Bronislavovych, Доктор технічних наук Registration Date 02-01-2022 Organization Institute of Problems of Materials Science named after IM Frantsevich of the National Academy of Sciences of Ukraine popup.description2  Powder mixtures of Si3N4–TiN system and composites reinforced by nanofibers formed in “chessboard” structure demonstrate a high tendency to sinter in 2,45 HHz microwave field. That makes it possible to obtain dense nanostructured composites. Microwave-consolidated composites TiN–Si3N4 have ~99% of theoretical density and fine-grained structure with grain size of 30 nm (Si3N4) and ~100 nm (TiN). The silicon nitride nanofibers additive leads to an increase in the characteristics of the obtained composites. Mechanical properties of sintered nanocomposites are: hardness - 20 GPа; fracture toughness 5,5 MPа·m1/2. Adding the Si3N4 nanofibers significantly increases the wear-resistance of the material and reduces the adhesion with the counter-sample. TiN–TiB2 coatings obtained on steel surface by electrospark deposition increase the hardness of substrate from 3-4 GPа to 11-14 GPa. The laser processing of electrospark coatings leads to significant increase in the surface wear-resistance at heavy friction conditions. The TiN–TiB2 laser processed coatings under the friction with hard alloy counter-sample reduce the linear wear of surface from 15 to 0,5 micron compared to initial substrate. Product Description popup.authors Yeremenko Lyudmyla I. Hrinkevych Kostyantyn E. Lytvyn Roman V. Myslyvchenko Oleksandr M. Tkachenko Ivan V. popup.nrat_date 2022-03-09 Close