Boron carbide—A comprehensive review

Thévenot, F.

doi:10.1016/0955-2219(90)90048-k

Cited by 1,281 publications

(656 citation statements)

References 59 publications

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“…B oron carbide (B 4 C) is an important ceramic material because of low density, high Hugoniot elastic limit, superhigh hardness and good electric conductivity [1][2][3][4] . It has been used in a variety of important applications where hardness, weight and conductivity are critical.…”

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Enhanced mechanical properties of nanocrystalline boron carbide by nanoporosity and interface phases

et al. 2012

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Ceramics typically have very high hardness, but low toughness and plasticity. Besides intrinsic brittleness associated with rigid covalent or ionic bonds, porosity and interface phases are the foremost characteristics that lead to their failure at low stress levels in a brittle manner. Here we show that, in contrast to the conventional wisdom that these features are adverse factors in mechanical properties of ceramics, the compression strength, plasticity and toughness of nanocrystalline boron carbide can be noticeably improved by introducing nanoporosity and weak amorphous carbon at grain boundaries. Transmission electron microscopy reveals that the unusual nanosize effect arises from the deformation-induced elimination of nanoporosity mediated by grain boundary sliding with the assistance of the soft grain boundary phases. This study has important implications in developing high-performance ceramics with ultrahigh strength and enhanced plasticity and toughness.

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Enhanced mechanical properties of nanocrystalline boron carbide by nanoporosity and interface phases

et al. 2012

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“…Nanoindentation measurements have also shown the extremely high value of c-BC 5 nanohardness, i.e., 73(7) GPa. In Table I, we compare c-BC 5 with diamond, cBN, and boron carbide in terms of mechanical properties [25][26][27][28].…”

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Ultimate Metastable Solubility of Boron in Diamond: Synthesis of Superhard DiamondlikeBC5

et al. 2009

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“…B 4 C is evaluated as an ideal material for nuclear applications, especially as control rods in reactors and shielding material in neutron shielding systems, due to its high hardness; being the third hardest material after diamond and cubic boron nitride, high flexural strength, low density, high wear resistance, chemical stability and thermal neutron cross-section value properties [1,2].…”

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Processing, Mechanical and Nuclear Characterization of Boron Carbide Ceramics Consolidated by Spark Plasma Sintering

et al. 2015

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Boron carbide (B4C) ceramics were produced by spark plasma sintering technique with 5, 10, 15, and 20 vol.% aluminum (Al) in order to improve sintering behaviours of B4C ceramics. B4C ceramics were produced, having square cross-section and 50×50×5 mm 3 dimensions. The sintering process was carried out at different temperatures by applying 40 MPa of pressure with 100 • C/min under vacuum. The effects of various amounts of Al additive and sintering temperature on density, vickers hardness, fracture toughness and microstructure were examined. The hardness and fracture toughness of the samples were evaluated by the Vickers indentation technique. Microstructures of the samples were characterized by scanning electron microscopy technique. Fast neutron attenuation properties of the ceramics having highest density were also investigated.

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Boron carbide—A comprehensive review

Cited by 1,281 publications

References 59 publications

Enhanced mechanical properties of nanocrystalline boron carbide by nanoporosity and interface phases

Enhanced mechanical properties of nanocrystalline boron carbide by nanoporosity and interface phases

Ultimate Metastable Solubility of Boron in Diamond: Synthesis of Superhard DiamondlikeBC5

Processing, Mechanical and Nuclear Characterization of Boron Carbide Ceramics Consolidated by Spark Plasma Sintering

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