Results 211 to 220 of about 38,530 (252)

Boron Carbide/Boron Carbide-Carbon Nanofibers Laminates with Weak Interfaces

2010
Three 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, Mykola Lugovy, Viktor Slyunyayev, Vladimir Subbotin, Fei Liang, Jihua Gou, Jakob Kuebler, Thomas Graule   +7 more
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Voids in boron carbide

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
openaire   +1 more source

Ferroboron and Boron Carbide

2020
For the first time, free boron was obtained in 1808 by Louis Joseph Gay-Lussac and Louis Jacques Tenard by heating B2O3 boron oxide with metallic potassium.
Mikhail Gasik, Viktor Dashevskii, Aitber Bizhanov   +2 more
openaire   +1 more source

Sputtering behavior of boron and boron carbide

Journal of Nuclear Materials, 1992
Sputtering yields of boron were measured with D + and B + ions for normal and oblique angles of incidence. Self-sputtering data of boron carbide were simulated in the experiment by using Ne + ions. The energies of the impinging ions were between 20 eV and 10 keV.
Hechtl, E., Mazanec, A., Eckstein, W., Roth, J., Garcia-Rosales, C.   +4 more
openaire   +2 more sources

Actinoidmetal Boron Carbides

1990
The constitution i.e. the phase equilibria of the ternary systems: actinoid metal (Th,U,Pu,Np) — boron — carbon has been investigated by X-ray diffraction and metallographic techniques as well as by melting point analysis, and phase relations have been established in isothermal sections.
openaire   +1 more source

Preparation of Boron from Boron Carbide

Journal of The Electrochemical Society, 1960
A process for the preparation of elemental boron from boron carbide is presented. Included is evidence which shows that the process is one of anodic transfer. Boron of at least 99.8% purity can be made directly from technical-grade materials. Purity is a function of electrolysis voltages and boron carbide purity.
openaire   +1 more source

Electroextraction of boron from boron carbide scrap

Materials Characterization, 2013
Studies were carried out to extract elemental boron from boron carbide scrap. The physicochemical nature of boron obtained through this process was examined by characterizing its chemical purity, specific surface area, size distribution of particles and X-ray crystallite size.
Ashish Jain, S. Anthonysamy, C. Ghosh, T.R. Ravindran, R. Divakar, E. Mohandas   +5 more
openaire   +1 more source

Thermal properties of boron and boron carbides

AIP Conference Proceedings, 1986
The specific heat of β‐B shows the features characteristic for pure dielectric crystals. At low temperatures, it varies as T3; from the prefactor the Debye temperature is determined to 1520 K. In boron carbides, however, low temperature anomalies have been observed.
P. R. H. Türkes, E. T. Swartz, R. O. Pohl   +2 more
openaire   +1 more source

Thermal expansion of boron and boron carbide

Journal of the Less Common Metals, 1986
Abstract Thermal expansion of poly crystalline α-rhombohedral boron (in the range from 300 to 1270 K), of β-rhombohedral boron (from 300 to 1470 K) and boron carbide B 4 C (from 300 to 1970 K) have been investigated by means of high temperature X-ray diffractometry. The linear coefficients of thermal expansion perpendicular ( α ⊥ ) and parallel ( α
G.V Tsagareishvili, T.G Nakashidze, J.Sh Jobava, G.P Lomidze, D.E Khulelidze, D.Sh Tsagareishvili, O.A Tsagareishvili   +6 more
openaire   +1 more source

Predicting two-dimensional semiconducting boron carbides

Nanoscale, 2019
Carbon and boron can mix to form numerous two-dimensional (2D) compounds with strong covalent bonds, yet very few possess a bandgap for functional applications.
Xinxin Tian, Xiaoyu Xuan, Meng Yu, Yuewen Mu, Hai-Gang Lu, Zhuhua Zhang, Si-Dian Li   +6 more
openaire   +2 more sources