The results of studying the crack resistance of reaction-sintered B4C–SiC composite materials impregnated with liquid silicon with identification and fracture methods are presented. With an increase in the amount of B4C in the reaction-sintered material, its fragility increases. The crack resistance of the material can be increased from 3.40 to 4.02 MPa·m1/2 (when tested by different methods) by adding to the composite material up to 30 wt.% SiC. The material is destroyed mainly by the intercrystalline (intergranular) mechanism. Ceramics containing more than 90 wt.% B4C, is partially destroyed by the transcrystalline mechanism.
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Translated from Novye Ogneupory, No. 3, pp. 49 – 54, March 2019.
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Perevislov, S.N. Evaluation of the Crack Resistance of Reactive Sintered Composite Boron Carbide-Based Materials. Refract Ind Ceram 60, 168–173 (2019). https://doi.org/10.1007/s11148-019-00330-0
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DOI: https://doi.org/10.1007/s11148-019-00330-0