ИСТИНА

Dynamic fragmentation of alumina by plasma spraying and of carbon and silicon carbide composite based Bannikova I A1,@, Saveleva N V1, Uvarov S V1,Bannikov M V1, Khokhlov A V2, Gareev A R3 and Naimark O B1 1 Institute of Continuous Media Mechanics of the Ural Branch of the Russian Academy of Sciences, Academician Korolev Street 1, Perm 614013, Russia 2 Institute of Mechanics, Lomonosov Moscow State University, Michurinskiy 1, Moscow 119192, Russia 3 Joint-Stock Company Research Institute of Graphite-based construction materials niigraphite, Elektrodnaya 2 bldg 1, Moscow 111524, Russia *** Cylindrical specimens made of alumina by plasma spraying Al2O3 PS (UrFU, Ekaterinburg) [1] and siliconised graphite SG-P0.5 (JSC NIIgraphite, Moscow) under dynamic (DL) and quasi-static (QSL) loading conditions in the fragment preservation mode were tested. In order to determine statistical regularities of fracture and fragmentation processes of composites and ceramics. QSL and DL of specimens were carried out on a Shimadzu AGX-Plus machine and on a Hopkinson’s split bar unit “RSG-25”. Fragmentation statistics were analyzed using the “weighting” method and the “photography” method [2]. It is shown that the type of N(m) distributions changes when the loading mode is changed (QSL, DL), which corresponds to different scenarios of fracture surface formation and fragment shape. This research was supported by the Russian Science Foundation (project 21-79-30041), https://rscf.ru/en/project/21-79-30041/. *** [1] Bannikova I, Saveleva N, Uvarov S, Bannikov M, Panfilov P and Naimark O 2023 Russian Physics Journal 66 990–997 [2] Bannikova I 2017 Zavodskaya laboratoriya. Diagnostics of materials 83 42—44 (in Russian)