Search results
Results from the WOW.Com Content Network
Up-to-date ceramic technology involves invention and design of new components and optimization of production processes of complex structures. Ceramics can be formed by a variety of different methods which can be divided into three main groups, depending on whether the starting materials involve a gas, a liquid, or a solid.
For example, such methods are required for producing advanced, high-temperature structural parts such as heat engine components, recuperators and the like from powders of ceramic raw materials. Typical parts produced with this production operation include impellers made from stainless steel, bronze, complex cutting tools, plastic mould tooling ...
Primary applications are the reduction of microshrinkage, the consolidation of powder metals, ceramic composites and metal cladding. Hot isostatic pressing is thus also used as part of a sintering (powder metallurgy) process and for fabrication of metal matrix composites, [3] often being used for postprocessing in additive manufacturing. [4]
When sufficient sintering has taken place, the ceramic body will no longer break down in water; additional sintering can reduce the porosity of the ceramic, increase the bond area between ceramic particles, and increase the material strength. [5] Industrial procedures to create ceramic objects via sintering of powders generally include: [6]
Simulation of the outside of the Space Shuttle as it heats up to over 1,500 °C (2,730 °F) during re-entry into the Earth's atmosphere Bearing components made from 100% silicon nitride Si 3 N 4 Ceramic bread knife. Ceramic engineering is the science and technology of creating objects from inorganic, non-metallic materials. This is done either ...
Additionally, nanocrystalline ceramics have been shown to sinter more rapidly than bulk ceramics, leading to higher densities and improved mechanical properties, [5] although extended exposure to the high pressures and elevated temperatures required to sinter the part to full density can result in coarsening of the nanostructure.
SPS is also used for sintering of carbon nanotubes [11] for development of field electron emission electrodes. Functioning of SPS systems is schematically explained in a video link. [12] While the term "spark plasma sintering" is commonly used, the term is misleading since neither a spark nor a plasma is present in the process. [13]
Unfired clay is a common example of a green body. A green body is an object whose main constituent is weakly bound clay material, usually in the form of bonded powder or plates before it has been sintered or fired.