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Ceramic Composite Manufacturing

Machining techniques requires professional methods, skills and equipments. As the material has very good chemical properties, you should always opt for a safe machining process to avoid unnecessary hassles. 

Machining techniques requires professional methods, skills and equipments. As the material has very good chemical properties, you should always opt for a safe machining process to avoid unnecessary hassles. 

The Ceramics are crystalline, non-metallic material, typically made up of inorganic materials. Early ceramics were made up of clay and clay-mixtures and used to make pottery mainly. However, current technological growth has enabled multiple applications of ceramics, such as in semi-conductors and machining high end products.

There are four general categories of ceramics: Structural, Technical, Refractories, and Whitewares. Technical and structural ceramics are characteristically engaged in industrial division. The typical features of ceramics include good mechanical hardness, high melting point, and increased structural strength. All ceramics are extremely good insulators. However, the degree to which a ceramic exhibits these characteristics depends upon their specific material composition and use.

Structural Ceramics and Technical Ceramics: The structural ceramics include materials such as bricks, piping and roofing tiles. On the contrary, the technical ceramics include more advanced ceramics whose raw materials often do not contain clay. These can be found in aerospace applications, biomedical implants and various other significantly specific devices.

There are two general classes of technical ceramics:
  1. Oxides
  2. Non-Oxides

The introduction of oxide fibers in a ceramic is helpful to provide the final component withstand strong oxidation. The oxide ceramics have very high mechanical reinforcement and strength. The ceramic oxides are available in several range of composition. These are formed in the course of different processes. All oxide fibers are formed through a chemical process, and then heated to an extreme temperature range of 1000- 1200 degree Celsius, to finalize the ceramic. There are numerous common processes are exists for the production of ceramic composition these include polymer pyrolysis, and chemical deposition process. Such process occurs at high heat, and sol-gel, wherein chemical solution deposition takes place through spinning fibers from a liquid.

The ceramic oxide fibers often comprise of zirconium dioxide, Machining Alumina trioxide, and titanium dioxide. Glass-forming oxides are Silica, phosphorous, and boron. These are generally required in large quantities. Fibers high which are high in aluminum, offer high chemical resistance, increased strength, and high temperature resistance. They can be made using a process similar to sol-gel, and then fired over high-heat. The end product has strong poly-crystalline structure, however, with contains a  rough surface. The surface can be smoothed using silica coating. The silica coating enhances the strength of the component. The Alumina and Zirconia ceramic fiber presents an improved mechanical properties. When these are exposed to extreme heat, and is typically more useful in composites that must withstand continual exposure to higher temperatures. Alumina-silica ceramic fiber also features similar properties same as alumunia-zirconia.

The oxide ceramics are not always suited to be used in extreme environments, therefore ceramic non-oxides are needed. The silicon nitride and silicon carbide are two commonly used ceramic non-oxide fibers. These offer high heat resistance, heat does not degrade until temperatures pass 2400 degrees Celsius. Moreover, the non-oxide ceramics offer high hardness, high corrosion resistance, and extremely high oxidation resistance. The Pressure less sintering techniques has made possible to manufacture dense compacts of silicon carbide. The silicon carbide is a lightweight element, with low thermal expansion and high conductivity. It is also a chemically stable compound. The fiber manufacturing techniques involves spinning and heat treating the final fiberHealth Fitness Articles, as is done in pyrolysis and sintering.

Source: Free Articles from ArticlesFactory.com

ABOUT THE AUTHOR


I've explained about various ceramic materials, its properties, alloys and application procedure. Machining Alumina and other oxide which require high expertise and advanced knowledge in this field.



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