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An Overview of SiC Material

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Basically, silicon carbide ceramic is one of the most advanced materials. As the name suggests, it is made of carbon and silicon. In nature, this mineral is found as a rare form of moissanite. Since 1893, silicon carbide has been in ceramic production. It is possible to bind the grains of this material. The idea is to make something really difficult. As there is a growing demand for marine engineering, automobile industry, space technology, and nuclear energy, the demand for this material is also increasing. Let’s find out more.

Chemical corrosion resistance

This ceramic offers a wide range of excellent properties such as chemical corrosion resistance, thermal shock resistance, increased hardness, thermal expansion coefficient, reduced wear resistance, and high temperature resistance.

That is why this material is commonly used in many industries, such as energy, information electronics, space technology, environmental protection, chemical industry, automobile industry.

Nowadays, these ceramics are used in many industries in the form of corrosion-resistant containers, such as the petrochemical industry. This material is used in a variety of equipment, such as mechanical seal parts, bearings and cutting tools. In addition, it is an ideal choice for a variety of engine components, rocket nozzles, gas turbines and many others.

Chemical properties

In the oxygen reaction, when the temperature reaches 1300 Celsius, a protective layer appears on these crystal surfaces. As the protective layers become thicker, the silicon carbide inside becomes even stronger.

As far as alloy resistance, alkalinity and acidity are concerned, silicon carbide comes with excellent acid resistance. However, it does not have good enough alkaline resistance.

Physical properties

From the point of view of density, almost all types of silicon carbide crystals are the same. When it comes to hardness, this material stands at 9.5 Mohs. Also, the Knoop hardness level is between 2670 and 2815 kg/mm. The good thing is that this level of hardness is much higher than most abrasive materials such as diamond.

Thermal shock resistance and thermal conductivity are also very good. Since the thermal expansion parameters are not so impressive, SiC ceramic is one of the best refractory materials.

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Electrical properties

At constant temperature, commercial silicon carbide ceramic acts as a type of semiconductor. As the temperature increases, the internal resistance of this material decreases. Also, the conductivity of this material varies when it comes to impurities.

Good hydrophilicity

When it comes to hydrophilicity, silicon carbide ceramic has strong covalent bonds. Based on Pauling’s electronegativity calculations, the ionic strength of this material is only 12%. So, we can say that this material has wear resistance, large elastic modulus and high level of hardness.

Long story short, this was a review of silicon carbide ceramic. Hope this review helps you to understand the content in depth. As this material has many excellent properties, it is used in a wide range of industries.

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