Hot pressing is one of the fabrication techniques in which metals, alloys or ceramics powders are consolidated under simultaneous heat and pressure to form a monolithic component. This forming process is used to reduce the metals porosity and increase the density of many ceramics. It also improves the mechanical properties and workability of powder materials. This process is one of the most important processes used in powder metallurgy.
Chemical Vapor Deposition (CVD) is a process in which the gas precursors, activated by heat, light or plasma in a chamber, react on or near the vicinity of a heated substrate surface and deposit in a solid phase onto the surface.
Electrospinning is a unique method to produce ultrafine fibers (micrometer to nanometer) with high specific surface area from polymer solutions or melts using electrical energy.
Plasma Enhanced Chemical Vapor Deposition (PECVD) is a specific type of CVD which all CVD processes are influenced by plasma, in a way that it enables them to proceed far more efficiently at relatively lower temperatures.
Electrospinning is a unique method to produce ultrafine fibers (micrometer to nanometer) with high specific surface area from polymer solutions or melts using electrical energy. Typically, electrospinning needs a direct current (DC) in the range of several tens of kV. Currently, electrospinning device has two standards, i.e. vertical and horizontal. This process is carried out at room temperature and at normal pressure. Most of the polymers are dissolved in a suitable solvent before electrospinning process.
Electrospinning is regarded as one of the versatile and popular industrial methods in production of polymer nanofibers from suspension solution (precursor polymer). This method in some respects is very similar to its much earlier type, i.e.
Electrospinning is the applicable methods for polymer nanofibers producing in industrial or laboratory-scale. The polymer precursor can be in solution state or polymer melt as the process input. In this method it tried to produce the polymer stream assisting of strong electrical field at the first, then the steam followed by destabilizing can produce polymer nanofibers.
The heat sensitive materials drying and solvent extracting from the polymers structures, the bio components and inorganic are the main consideration of pharmaceutical industry, food, medicine, etc.
Chemical Vapor Deposition (CVD) is one of the vacuum-based techniques which can produce coatings nearly from all materials including metallic and non-metallic compounds, carbides, nitrides, oxides, intermetallics and many other materials. In summary, CVD is formation and deposition of a solid layer on a substrate which results from chemical reaction(s) of gaseous reactants in a reaction chamber.
5307
