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    Aluminum dodecaboride - and boron carbide-based ceramics for extreme environments
    Tetiana Prikhna1; Pavlo Barvitskiy2; Viktor Moshchil2; Olena Prysiazhna3; Myroslav Karpets2; Semyon Ponomaryov4; Volodymyr Kushch3; Valeriy Muratov5; Fernard Marquis6;
    1V. BAKUL INSTITUTE NASU, Kiev, Ukraine; 2INSTITUTE FOR SUPERHARD MATERIALS, Kiev, Ukraine; 3INSTITUTE FOR SUPERHARD MATERIALS OF THE NATIONAL ACADEMY OF SCIENCES OF UKRAINE, Kiev, Ukraine; 4INSTITUTE OF SEMICONDUCTOR PHYSICS OF THE NATIONAL ACADEMY OF SCIENCES OF UKRAINE (NASU), Kyiv, Ukraine; 5(1) FRANTSEVICH INSTITUTE FOR PROBLEMS OF MATERIALS SCIENCE OF THE NATIONAL ACADEMY OF SCIENCES OF UKRAINE, Kyiv, Ukraine; 6NAVAL POSTGRADUATE SCHOOL, Monterey, United States;
    PAPER: 285/AdvancedMaterials/Regular (Oral)
    SCHEDULED: 14:00/Mon. 28 Nov. 2022/Saitong



    ABSTRACT:
    The developed lightweight dodecaboride - and boron carbide-based ceramic composites hold great potential for a wide range of applications in extreme conditions: personal protection or for armored defense of ground military equipment and vehicles for the manufacture of abrasive nozzles, friction pairs for pumping oil and other aggressive liquids, constructional ceramics for nuclear power plants, etc. The correlations between structures and mechanical characteristics of alpha-AlB<sup>12</sup>-, AlB<sub>12</sub>C2-, B<sub>4</sub>C-based lightweight ceramics and composites synthesized or sintered by hot pressing (at 30 MPa). 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 are discussed. Computer modeling of the influence of construction parameters of ceramic-composite barrier on ballistic steel rod of the B-32 armor-piercing bullet (hardness HRC = 67 and 5,32 g weight of the steel core) into a two-layer ceramic-composite barrier was performed. Ballistic tests performed on 10 mm thick plates fabricated from the developed ceramics showed that the materials could withstand shot using a bullet with initial kinetic energy of 3.7 kJ.