| 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: 119/Manufacturing/Keynote (Oral) SCHEDULED: 14:00/Thu. 24 Oct. 2019/Leda (99/Mezz. F) 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 AlB<sub>12</sub>C<sub>2</sub> and AlB<sub>12</sub> powder [1], with and without the addition of TiC, as well as from B<sub>4</sub>C, 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 B<sub>4</sub>C, 1878 MPa for B<sub>4</sub>C-SiC-based material and 795 MPa for AlB<sub>12</sub>C<sub>2</sub>-TiB<sub>2</sub> 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/cm<sup>3</sup> density as well as a composition of 78 wt.% of B<sub>4</sub>C and 22 wt.% of SiC according to X-ray diffraction analysis. According to SEM microprobe X-ray analysis, stoichiometries B<sub>3.64</sub>CSi<sub>0.01</sub> and SiC<sub>1.07</sub>, 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 AlB<sub>12</sub>C<sub>2</sub>-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 |
