Results 251 to 260 of about 9,993 (282)

Evidence for and role of boron carbide icosahedra in the hardness of amorphous hydrogenated boron carbide

Tribology Letters, 1998
We report both infrared absorption and 11B nuclear magnetic resonance measurements that provide evidence for the presence of boron carbide icosahedra in amorphous hydrogenated boron carbide (a‐B:C:H) thin films. The infrared absorption spectra are dominated by a broad line at 1280 cm-1 with a FWHM of 320 cm-1, and the 11B nuclear magnetic resonance ...
Janet Braddock‐Wilking, Shu‐Han Lin, Bernard J. Feldman   +2 more
openaire   +1 more source

Massive Icosahedral Boron Carbide Crystals

The Journal of Physical Chemistry B, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Bingqing Wei, Robert Vajtai, Yung Joon Jung, Florian Banhart, Ganapathiraman Ramanath, Pulickel M. Ajayan   +5 more
openaire   +1 more source

Magnetic susceptibility study of boron carbides

Physical Review B, 1985
We have measured the magnetic susceptibility of several boron carbides, including B/sub 4/C, B/sub 15/C/sub 2/, and B/sub 9/C, over the temperature range 2--400 K with magnetic fields between 1 and 50 kOe. In general, the susceptibility follows a Curie law with a temperature-independent diamagnetic contribution. There is some ferromagnetic contribution
, Azevedo, , Venturini, , Emin, , Wood
openaire   +2 more sources

Fivefold twinned boron carbide nanowires

Nanotechnology, 2009
Chemical composition and crystal structure of fivefold twinned boron carbide nanowires have been determined by electron energy-loss spectroscopy and electron diffraction. The fivefold cyclic twinning relationship is confirmed by systematic axial rotation electron diffraction. Detailed chemical analysis reveals a carbon-rich boron carbide phase.
Xin, Fu, Jun, Jiang, Chao, Liu, Jun, Yuan   +3 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

Fabrication of carbon-coated boron carbide particle and its role in the reaction bonding of boron carbide by silicon infiltration

Journal of the European Ceramic Society, 2022
Qian Xia, Nan Huang, Hongqiang Ru
exaly  

Boron Carbides

1995
Terrence Aselage, David Emin
openaire   +1 more source

Boron Carbide

2017
Dmitry Y. Kovalev, Sergey V. Konovalihin
openaire   +1 more source

Mechanical and radiation shielding properties of concrete containing commercial boron carbide powder

Construction and Building Materials, 2021
S E Chidiac, Mohamed A E Abdel-Rahman
exaly  

A novel ceramic with low friction and wear toward tribological applications: Boron carbide-silicon carbide

Advances in Colloid and Interface Science, 2022
exaly