Results 131 to 140 of about 236,167 (195)

Tuning the deformation mechanisms of boron carbide via silicon doping. [PDF]

open access: yesSci Adv, 2019
Xiang S   +11 more
europepmc   +1 more source

Oxidation behaviour of boron carbide

open access: yesJournal of Nuclear Materials, 1990
The oxidation behaviour of various boron-carbide samples have been studied by photoelectron spectroscopy. The exposure of sputter-cleaned surfaces to molecular oxygen at room temperature did not cause a measurable surface oxidation. An increased reactivity has been found by irradiating boron carbide with energetic oxygen ions.
Zehringer, R.   +3 more
openaire   +3 more sources

Sintering of Boron and Boron Carbide

Journal of Solid State Chemistry, 2000
An investigation of sintering kinetics of boron and boron carbide is presented. The influence of the powder size distribution on the temperature dependence of sintering, on reaching a high final density, and on gaining a homogeneous grain size has been shown.
G.I. Kalandadze   +2 more
exaly   +2 more sources

Design and Syntheses of Poly(Norbornenyldecaborane) Precursors to Boron Carbide and Boron-Carbide/Silicon-Carbide Ceramics

open access: yesMRS Proceedings, 2004
ABSTRACTPoly(norbornenyldecaborane) (PND) was synthesized via ruthenium catalyzed ring opening metathesis polymerization and was found to be a good single-source polymeric boron carbide precursor. Polymer blends of PND and allylhydridopolycarbosilane (AHPCS) were also found to be excellent precursors to boron-carbide/silicon-carbide composite materials.
Xiaolan Wei   +4 more
openaire   +2 more sources

Advanced microstructure of boron carbide

open access: yesJournal of Physics: Condensed Matter, 2012
The rhombohedral elementary cell of the complex boron carbide structure is composed of B(12) or B(11)C icosahedra and CBC, CBB or B□B (□, vacancy) linear arrangements, whose shares vary depending on the actual chemical compound. The evaluation of the IR phonon spectra of isotopically pure boron carbide yields the quantitative concentrations of these ...
Werheit, Helmut, Shalamberidze, Sulkhan
core   +5 more sources

Fabrication of Boron‐Carbide/Boron Heterojunction Devices [PDF]

open access: yesApplied Physics Letters, 1996
We have succeeded in the fabrication of a boron–carbide/boron diode on an aluminum substrate, and a boron–carbide/boron junction field effect transistor. Our results suggest that with respect to the approximately 2 eV band gap pure boron material, 0.9 eV
Peter A Dowben, Dongjin Byun
exaly   +2 more sources

Characterization of Boron Carbide Particles and Its Shielding Behavior Against Neutron Radiation

open access: yesEnergy Conversion and Management, 2013
Boron minerals, considered future essential materials, can be used as raw materials in the production of boron carbide. In this study, boron carbide, the hardest material after diamond and cubic boron nitride, is characterized and the neutron shielding ...
Sabriye Pişkin, Nurcan Tugrul
exaly   +2 more sources

Asymmetric twins in boron rich boron carbide

Physical Chemistry Chemical Physics, 2018
Twin boundaries (TBs) play an essential role in enhancing the mechanical, electronic and transport properties of polycrystalline materials.
Xiaokun Yang, William A. Goddard, Qi An
openaire   +3 more sources

Phosphorus doping of boron carbides

Physical Review B, 1993
Substitution of an electron donor such as phosphorus for a carbon or boron atom in [ital p]-type semiconducting boron carbides is expected to reduce the hole concentration. Phosphorus-doped boron carbide samples have been prepared by hot isostatic pressing with homogeneous dopant levels of up to one phosphorus atom per ten unit cells.
, Aselage   +8 more
openaire   +2 more sources

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