ORALS

SESSION: ManufacturingThuPM1-R2	2nd Intl. Symp.on Advanced Manufacturing for Sustainable Development
Thu Oct, 24 2019 / Room: Leda (99/Mezz. F)
Session Chairs: Jerzy Pisarek; Session Monitor: TBA

14:00: [ManufacturingThuPM105] Keynote
Modeling, Structure and Properties of Aluminum Dodecaboride and Boron Carbide-Based Ceramics
Tetiana Prikhna¹ ; Pavlo Barvitskiy¹ ; Richard Haber² ; Volodymyr Kushch³ ; Leonid Devin³ ; Sergey Dub¹ ; Myroslav Karpets¹ ; Semyon Ponomarov⁴ ; Florian Kongoli⁵ ; Fernand Marquis⁶ ; ¹Institute for Superhard Materials, Kiev, Ukraine; ²Department of Materials Science and Engineering, Rutgers, The State University of New Jersey, New Brunswick, United States; ³Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kiev, Ukraine; ⁴Institute of Semiconductor Physics, Kiev, Ukraine; ⁵FLOGEN Technologies Inc., Mont-Royal, Canada; ⁶San Diego State University, San Diego, United States;
Paper Id: 119 [Abstract]

The results of the study of structures and mechanical properties of ceramic materials will be discussed. These ceramic materials were obtained by hot pressing from the submicron AlB₁₂C₂ and AlB₁₂ powder [1], with and without the addition of TiC, as well as from B₄C, without and with SiC additions. Temperature, pressure and composition of the starting powder are optimized to obtain sintered bodies with desired high mechanical characteristics. X-ray diffraction, scanning electron microscopy and Raman microspectroscopy are utilized to investigate phase composition and microstructure of the sintered ceramics. High compression strength (1551 MPa for B₄C, 1878 MPa for B₄C-SiC-based material and 795 MPa for AlB₁₂C₂-TiB₂ based material) together with high bending strength, hardness, fracture toughness, and a light weight make the synthesized and sintered ceramics very promising as a shock-wave resistant material. The effect of C, TiC and SiC additions on the properties of the resultant composites and the particularities of the ceramics destruction under shock loading will be discussed. The results of the modeling of ballistic characteristics will be discussed. The performed ballistic tests of 10 mm thick plates from the developed ceramic had a 2.63 g/cm³ density as well as a composition of 78 wt.% of B₄C and 22 wt.% of SiC according to X-ray diffraction analysis. According to SEM microprobe X-ray analysis, stoichiometries B_3.64CSi_0.01 and SiC_1.07, respectively, showed that the plates can withstand the shot of a B32 bullet with kinetic energy of 3.7 kJ from a 10 m distance.

References:
[1] T.A. Prikhna, R. A. Haber, P.P. Barvitskiy, V.B. Sverdun, S.N. Dub, V.B. Muratov, V. Domnich, M.V. Karpets, V.E. Moshchil, M.G. Loshak, V.V. Kovylaev and O.O. Vasiliev Synthesis, sintering, structure and properties of AlB₁₂C₂-based materials //Proceedings of the 41st international conference on advanced ceramics and composites: ceramic engineering and science proceedings (January 22-27, 2017. - Daytona Beach, Fla.) (eds J. Salem, J. C. LaSalvia, R. Narayan, D. Zhu), John Wiley & Sons, Inc., Hoboken, NJ, USA. - 2018. - Vol. 38, Is. 2. - Р. 195-203. doi: 10.1002/9781119474678.ch19

SESSION: AdvancedMaterialsFriPM1-R2	5th Intl. Symp. on New and Advanced Materials and Technologies for Energy, Environment and Sustainable Development
Fri Oct, 25 2019 / Room: Leda (99/Mezz. F)
Session Chairs: Lev Rapoport; Teofilo Rojo; Session Monitor: TBA

14:00: [AdvancedMaterialsFriPM105] Keynote
Low Cost, Corrosion Resistant and Microwave-Absorbing Coatings
Tetiana Prikhna¹ ; Mykola Monastyrov² ; Fernand Marquis³ ; Viktor Moshchil¹ ; Olena Prysiazhna⁴ ; Bernd Halbedel⁵ ; Pavlo Barvitskiy¹ ; ¹Institute for Superhard Materials, Kiev, Ukraine; ²Open International University of Human Development Ukraine, Kiev, Ukraine; ³San Diego State University, San Diego, United States; ⁴Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kiev, Ukraine; ⁵Technische Universitat Ilmenau, Ilmenau, Germany;
Paper Id: 117 [Abstract]

New low cost masking coatings have been developed. These coatings are based on corrosion resistant polyurethane and acrylic-urethane priming varnishes and paints of Ukrainian manufacture (InterGasSinthez). In addition, the coatings are also based on nanopowders of polyvalent iron oxides obtained by electroerosion dispersion [1], carbon, omega spheres (based on silica and alumina), and basalt fibers demonstrating high absorption abilities (90-99%) of microwaves in a wide range of frequencies (10-70 GHz, wavelength 0,03-0,0043 m) with their reflection close to zero (-10 Db - - 23 Db or 10% -0.5%). Polymeric bases of the developed coatings are used to protect against corrosion of metal structures in all macroclimatic areas, in sea and fresh water, in saline solutions, and in oil and oil products that are resistant to ultraviolet radiation, aggressive media. They demonstrate high mechanical performance (adhesion, strength, elasticity) and long service life. The coatings can be used for painting of ships, deck structures, containers, building constructions and buildings, auto and railway transports, parts and mechanisms, etc.

References:
[1] B. Halbedel, T. Prikhna/, P. Quiroz, J. Schawohl, T. Kups, M. Monastyrov Iron oxide nanopowder synthesized by electroerosion dispersion (EED), Properties and potential for microwave applications // Current Applied Physics. - 2018. - Vol. 18. - P. 1410-1414