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Progress in pressureless sintering of boron carbide ceramics – a review
Advances in Applied Ceramics: Structural, Functional and Bioceramics, 2019Boron carbide (B4C) ceramics has many outstanding performance, such as extremely high hardness, low density, high melting point, high elastic modulus, high thermoelectromotive force, high chemical resistance, high neutron absorption cross section, high ...
Wei Zhang, S. Yamashita, H. Kita
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Shocked ceramics melt: An atomistic analysis of thermodynamic behavior of boron carbide
, 2020Macroscale experiments for structural response of materials often do not capture deformation features at the atomistic scale. This limitation becomes more pronounced in materials subjected to shock loading, especially in covalently bonded ceramics such ...
Matthew Devries, G. Subhash, A. Awasthi
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Pressureless sintering of titanium carbide doped with boron or boron carbide
Journal of the European Ceramic Society, 2017Abstract Titanium carbide ceramics with different contents of boron or B 4 C were pressureless sintered at temperatures from 2100 °C to 2300 °C. Due to the removal of oxide impurities, the onset temperature for TiC grain growth was lowered to 2100 °C and near fully dense (>98%) TiC ceramics were obtained at 2200 °C.
Yifeng Gu +3 more
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Photoluminescence of boron carbide
Journal of Solid State Chemistry, 2004Abstract The excitation of B4.3C with an Ar-laser ( ℏω=2.4 eV ) yields a photoluminescence spectrum between about 1.56 and 1.58 eV with its main maximum at 1.563 eV and a weaker maximum at 1.572 eV. It is attributed to the indirect-allowed recombination of free excitons.
R. Schmechel +3 more
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, 2020
In the presented work, a boron carbide sample with a purity of 99.9%, particle size [Formula: see text]–[Formula: see text]m and a density of [Formula: see text] was used. Boron carbide samples were irradiated with linear electrons in the energy range of
M. Mirzayev +11 more
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In the presented work, a boron carbide sample with a purity of 99.9%, particle size [Formula: see text]–[Formula: see text]m and a density of [Formula: see text] was used. Boron carbide samples were irradiated with linear electrons in the energy range of
M. Mirzayev +11 more
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Metallography of boron carbide
Metallography, 1976A method of preparing B/sub 4/C for metallographic examination is described. The specimen is first cut with a diamond saw to produce a reasonably flat surface in order to reduce the grinding time. It is then mounted in a plastic material with pieces of a hard material (e.g., alumina) disposed around it to preserve flatness during grinding and polishing
B. Champagne, M. Beauvy, R. Angers
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Ceramics–Boron Carbide-Ferroelectrics
2021This chapter brings together various studies on materials that happen to be ceramics. This includes Boron Carbide, (C11B) CBC or B4C, where we seek alloys or other changes to make it ductile, The BaTiO3 ferroelectric where we examined 90 and 180 degree domain wall boundaries, and Silica glass Applications to BaZrO3 electrolytes are
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Monoclinic boron carbide crystals
Journal of Structural Chemistry, 2017The X-ray diffraction (XRD) study of boron carbide obtained by self-propagating high-temperature synthesis reveals monoclinic single crystals. This is in contradiction with the literature data that boron carbide crystals are hexagonal. According to the XRD data, hexagonal and monoclinic crystals of boron carbide have almost identical structures.
S. V. Konovalikhin +3 more
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Boron Carbide/Boron Carbide-Carbon Nanofibers Laminates with Weak Interfaces
2010Three layered B4C/B4C-Cnanofibers laminates have been produced using a hot pressing technique. The laminates were designed with thick (~2.6 mm) outer layers of B4C and a thin (~90 µm) center layer of B4C-70 wt% Cnanofibers. It was found that low tensile thermal residual stress develops in the thick B4C outer layers.
Nina Orlovskaya +7 more
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Journal of Nuclear Materials, 1973
Abstract Two different void morphologies have been observed in the commercial grades of boron carbide that are currently undergoing assessment as candidates for the control rod material in fast breeder reactors. Some grains in unirradiated powders contain dodecahedral voids which are closely associated with iron-rich precipitates believed to be ...
K.H.G. Ashbee, F.C. Frank, C.K.H. DuBose
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Abstract Two different void morphologies have been observed in the commercial grades of boron carbide that are currently undergoing assessment as candidates for the control rod material in fast breeder reactors. Some grains in unirradiated powders contain dodecahedral voids which are closely associated with iron-rich precipitates believed to be ...
K.H.G. Ashbee, F.C. Frank, C.K.H. DuBose
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