Original title: Lehké keramické materiály pro balistickou ochranu
Translated title: Light ceramic materials for ballistic protection
Authors: Greguš, Peter ; Pouchlý, Václav (referee) ; Salamon, David (advisor)
Document type: Master’s theses
Year: 2020
Language: slo
Publisher: Vysoké učení technické v Brně. Fakulta strojního inženýrství
Abstract: [slo] [eng]
Obsahom tejto práce je ucelená charakteristika ľahkých neoxidových keramických materiálov pre balistické aplikácie, rešerš technológií výroby, spracovania keramiky na báze karbidu bóru B4C a demonštrácia rámca na vyhodnotenie balistickej odolnosti materiálu na základe mechanických vlastností. Pomocou výstupov z teoretickej časti bol pripravený experiment, príprava kompozitného materiálu (B4C + Si, B4C + Ti) metódou Spark plasma sintering (SPS) s objemovým podielom dopantu do 5 %. Získané vzorky boli podrobené mechanickému testovaniu, výsledky ktorého boli pre jednotlivé podiely porovnané, s cieľom identifikovať ideálne množstvo dopantu s ohľadom na prebiehajúce chemické reakcie. Na účely balistickej ochrany sa javí najlepšie materiál s najvhodnejšími vlastnosťami (tvrdosť = 3502 ± 122 HV1, lomová húževnatosť KIC = 2,97 ± 0,03 MPam^0,5), B4C + 1,0 obj. %. This thesis gives a comprehensive characterization of lightweight non-oxide ceramic materials for ballistic applications, an overview of production technologies and processing of boron carbide B4C and its ceramic-based composites. A framework for evaluating the ballistic resistance of the material based on mechanical properties is shown there. It can be used in experiments without normalized equipment. The experiments including B4C + Si, B4C + Ti composites, and application of Spark plasma sintering (SPS) were designed according to outputs from the theoretical part. The volume fractions of Si, Ti dopants were optimized based on ongoing chemical reactions during sintering. The obtained samples were subjects of mechanical testing which results were compared to identify the ideal ratio of matrix and reinforcement. As the best suited material for ballistic protection, B4C + 1,0 obj. % reaches these values of parameters; hardness = 3502 ± 122 HV1; fracture toughness KIC = 2,97 ± 0,03 MPam^0,5.
Keywords: B4C; Ballistic protection; Ceramic matrix composite (CMC); Dimensional analysis and property correlation; Low-weight structural ceramics; SiC; Spark plasma sintering (SPS)

Institution: Brno University of Technology (web)
Document availability information: Fulltext is available in the Brno University of Technology Digital Library.
Original record: http://hdl.handle.net/11012/192376

Permalink: http://www.nusl.cz/ntk/nusl-417147


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Universities and colleges > Public universities > Brno University of Technology
Academic theses (ETDs) > Master’s theses