NANOTUBES AND NANOWIRES AS REINFORCEMENT:
NANOMATERIALS
In the development of nano-vehicles, is expected nanotubes and nanowires to significantly improve the properties of composite materials. Silicon carbide has considered as an excellent reinforcement wires for vehicles because of the strength of the core material. However, the silicon carbide wires have a smooth surface and is easily removed when the compound fracture because of low adhesion between matrix and wires. Therefore, we must make the wires glimpse of the silicon carbide surface to improve adhesion.
Wires – with a hexagonal cross-section, with a diameter of 50-300 nm, and a length of several tens to several hundreds of micrometers – have a zig-zag arrangement of sectors associated periodically with a uniform thickness over the entire length of growth. The computer simulation shows that the zigzag structure is in the form of a column formed by the stack of hexagonal SiC disks {111}. A minimum surface energy and energy arguments tension explain formation of twins league in carbide wires.
Double-crystal nanowires exhibit different luminescence and chemical stability. Beaded form silicon carbide nanowires can greatly reinforced epoxy composite tensile strength. Therefore, the new type of twinning SiC nanowires are expected to find important applications in nano composites. Nanotechnology is a recently developed, mainly favorable tool that has created some of the industry is expanding rapidly to applied science, technical science, engineering.
It is the use of very small particles of materials to create new large scale materials. Although more thorough definitions were used by some researchers as well, the key factor is the size of particles because properties of materials are dramatically affected under a scale of the nanometer (nm), 10-9 meter (m).
The materials possess original physical, chemical and biological characteristics, and the main change is primarily caused by the nano-quantum dimensional effect and surface effect, which can lead to the change in melting point, magnetism, heat resistance, electrical potential energy, optical properties, chemical activity, surface energy and catalysticities of the matter. Consequently these materials can therefore be used for a host of previously unconsidered applications.
Nanotechnology innovations offer major new road. This new material is not only lightweight, but also stronger and more flexible, the material has a high sensitivity, versatility and smart features. Therefore, you can say nanotechnology industry in the 21st century to be the main driver of industrial development. Besides the influence of the quantum effect and surface, the Assembly had abolished the concept of traditional manufacturing methods bottom-up and top-down. The development of nanotechnologies and their applications, industry to develop new materials and new products and methods of product quality cheap.
Below about 1 nm, the properties of materials become familiar and predictable, as this is the established domain of chemistry and atomic physics.
At a level of nanometers, the surface properties start becoming more dominant than the bulk material properties, generating unique material attributes and chemical reactions. More fundamentally, the electronic structure of materials becomes size-dependent as the dimensions enter the nanoscale.
Nanotechnology can be used in many different areas of design and construction processes since, nanotechnology generated products have many unique characteristics. These characteristics can, again, significantly fix current construction problems, and may change the requirement and organization of the construction process.
These include products with the following applications:
Lighter and stronger structural composites
Low maintenance coating
Improving pipe joining materials and techniques.
The coating can be applied on metal ,plastic, concrete, brick, wood.
Increases Anticorrosion.
Withstands fuels and lubricants, dissolvents, alkaline and acid-solutions.
How NANOMATERIALS are used in construction?
0 comments:
Post a Comment