Registration Number
0222U000027,
0121U113789
, R & D reports
Title
Research and development of nanostructured microwave composites with enhanced wear resistance
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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
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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
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Yeremenko Lyudmyla I.
Hrinkevych Kostyantyn E.
Lytvyn Roman V.
Myslyvchenko Oleksandr M.
Tkachenko Ivan V.
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2022-03-09
