Search results
Results from the WOW.Com Content Network
The metal is capable of forming nanosize carbon structures, and growing nanosize carbon structures by means of a chemical vapor deposition method on the treated carrier in a gas atmosphere comprising a carbon-containing gas, followed by an optional surface modification step. This process allows optimizing porosity, hydrodynamical properties and ...
Since carbon nanotubes have a low density for a solid of 1.3 to 1.4 g/cm 3, its specific strength of up to 48,000 kN·m·kg −1 is the best of known materials, compared to high-carbon steel's 154 kN·m·kg −1. Under excessive tensile strain, the tubes will undergo plastic deformation, which means the deformation is permanent. This ...
Carbon nanotube metal matrix composites (CNT-MMC) are an emerging class of new materials that mix carbon nanotubes into metals and metal alloys to take advantage of the high tensile strength and electrical conductivity of carbon nanotube materials. [1]
Carbon materials have been widely used as cathodes because of their excellent electrical conductivities, large surface areas, and chemical stability. [19] [82] Especially relevant for lithium-air batteries, carbon materials act as substrates for supporting metal oxides. Binder-free electrospun carbon nanofibers are particularly good potential ...
When added to a bulk material, nanoparticles can strongly influence the mechanical properties of the material, such as the stiffness or elasticity. For example, traditional polymers can be reinforced by nanoparticles (such as carbon nanotubes ) resulting in novel materials which can be used as lightweight replacements for metals.
Carbon nanotubes are also a promising material as building blocks in hierarchical composite materials given their exceptional mechanical properties (~1 TPa in modulus, and ~100 GPa in strength). Initial attempts to incorporate CNTs into hierarchical structures (such as yarns, fibres or films [ 28 ] ) has led to mechanical properties that were ...
Filamentous carbon is a carbon-containing deposit structure that refers to several allotropes of carbon, including carbon nanotubes, carbon nanofibers, and microcoils. [1] [2] [3] It forms from gaseous carbon compounds. [1] Filamentous carbon structures all contain metal particles. These are either iron, cobalt, or nickel or their alloys.
In composite materials, the attached fullerene molecules may function as molecular anchors preventing slipping of the nanotubes, thus improving the composite's mechanical properties. A carbon peapod [47] [48] is a novel hybrid carbon material which traps fullerene inside a carbon nanotube. It can possess interesting magnetic properties with ...