搜索结果: 1-15 共查到“材料科学 Boron”相关记录18条 . 查询时间(0.066 秒)
Engineers at MIT and the University of Tokyo have produced centimeter-scale structures, large enough for the eye to see, that are packed with hundreds of billions of hollow aligned fibers, or nanotube...
Researchers Integrate Diamond/Boron Nitride Crystalline Layers for Use in High-Power Devices
Researchers Integrate Diamond/Boron Nitride Crystalline Layers High-Power Devices
2016/5/10
We have created a new state of BN (named Q-BN) through rapid melting and super undercooling and quenching by using nanosecond laser pulses. Phase pure c-BN is formed either by direct quenching of supe...
Researchers Discover New Phase of Boron Nitride and a New Way to Create Pure c-BN
Researchers Discover New Phase New Way Create Pure c-BN
2016/2/3
We report a direct conversion of hexagonal boron nitride (h-BN) into pure cubic boron nitride (c-BN) by nanosecond laser melting at ambient temperatures and atmospheric pressure in air. According to t...
Ultrasensitive sensors made from boron-doped graphene
Ultrasensitive sensors boron-doped graphene
2015/11/2
Ultrasensitive gas sensors based on the infusion of boron atoms into graphene -- a tightly bound matrix of carbon atoms -- may soon be possible, according to an international team of researchers from ...
Graphene-like material made of boron a possibility, experiments suggest（图）
Graphene-like material boron
2014/1/27
Graphene, a sheet of carbon one atom thick, may soon have a new nanomaterial partner. In the lab and on supercomputers, chemists have determined that a unique arrangement of 36 boron atoms in a flat d...
Theoretical investigation of methane adsorption onto boron nitride and carbon nanotubes
Theoretical investigation methane adsorption onto boron nitride carbon nanotubes
2010/8/31
Methane adsorption onto single-wall boron nitride nanotubes (BNNTs) and carbon nanotubes (CNTs) was studied using the density functional theory within the generalized gradient approximation. The struc...
Ductilization of Ni3Al by alloying with boron and zirconium
Ni3Al intermetallics Microalloying by B and Zr Ductilization Microstructure Mechanical properties
2009/12/2
The Ni3Al, which has an Ll2 structure, is an ordered compound which can be a very promising candidate for various high temperature applications. The lack of room temperature ductility and high tempera...
High-aluminium zinc alloy (ZnAl27Cu2) modified with titanium and boron
Zn alloys Modification Structure Mechanical properties
2009/6/19
The paper presents the results of investigations concerning the influence of the titanium-boron modifier quantity on the structure and mechanical properties of ZnAl27Cu2 alloy. The modification has be...
Electronic structure of boron-doped diamond with B–H complex and B pair
superconductivity diamond B–H complex boron pair
2009/1/28
The electronic structure of boron–hydrogen complex and boron pair in diamond are studied by
first-principles density-functional calculations with supercell models. The electronic structure
calculate...
Structure and superconductivity of isotope-enriched boron-doped diamond
boron-doped diamond superconductivity Raman spectroscopy isotope effect
2009/1/28
Superconducting boron-doped diamond samples were synthesized with isotopes of 10B, 11B,
13C and 12C. We claim the presence of a carbon isotope effect on the superconducting
transition temperature, w...
Synthesis of an orthorhombic high pressure boron phase
boron high-pressure high-temperature crystal structure
2009/1/28
The densest boron phase (2.52 g cm−3) was produced as a result of the synthesis under
pressures above 9 GPa and temperatures up to 1800 C. The x-ray powder diffraction pattern
and the Raman ...
Superconductivity in heavily boron-doped silicon carbide
boron-doped SiC hexagona cubic SiC type-I superconductor
2009/1/28
The discoveries of superconductivity in heavily boron-doped diamond in 2004 and silicon in
2006 have renewed the interest in the superconducting state of semiconductors. Charge-carrier
doping of wid...
Electronic structures and three-dimensional effects of boron-doped carbon nanotubes
boron doping carbon nanotubes superconductivity density functional theory
2009/1/28
We study boron-doped carbon nanotubes by first-principles methods based on the density
functional theory. To discuss the possibility of superconductivity, we calculate the electronic
band structure ...
The effects of boron impurity atoms on nickel Σ 5 (012) grain boundary by first principles calculations
Ab-initio calculation Stress corrosion cracking Tensile test
2008/10/30
Purpose: Impurity atoms in the grain boundary can be responsible for embrittlement or they can strengthen a material. In this work, we have modeled the effect of B impurity on Σ 5 (012) symmetrical ti...
Inoculation of aluminium with titanium and boron addition
Working properties of materials and products Aluminium Titanium
2007/7/30
Purpose: The main aim of studies was to determine mechanism of inocualtion of pure alumnium EN AW-Al99,5 structure with addition of titanium and boron, which are introduced to liquid metal in small am...