PERFORMANCE AND APPLICATION FIELDS OF SILICON CARBIDE SEALS

In the modern industrial field, seals play a crucial role. They can prevent the leakage of fluids or gases and ensure the normal operation and safety of the equipment. As a high-performance sealing material, silicon carbide seals have been widely used in many fields with their excellent performance.

1. The performance of silicon carbide seals

1). Excellent wear resistance

Silicon carbide has an extremely high hardness, second only to diamond and cubic boron nitride. This makes silicon carbide seals have excellent wear resistance and can maintain good sealing performance for a long time in harsh working environments. Even under high-speed rotation, high pressure or particle media, it can effectively resist wear and extend the service life of the seal.

2). Good corrosion resistance

Silicon carbide seals have good corrosion resistance to most chemicals. Whether it is acid, alkali, salt solution or organic solvent, silicon carbide can maintain stable properties without corrosion or damage. This makes it have a wide application prospect in chemical, petroleum, pharmaceutical and other industries.

3). High temperature resistance

Silicon carbide has high melting point and thermal stability, and can maintain good mechanical properties and sealing properties in high-temperature environments. Generally speaking, silicon carbide seals can work normally at temperatures up to 1600℃, which makes it an ideal sealing material in high-temperature fields such as metallurgy, electricity and aerospace.

4). High strength and rigidity

Silicon carbide seals have high strength and rigidity, and can withstand greater pressure and load. In high-pressure equipment, silicon carbide seals can effectively prevent leakage and ensure the safe operation of the equipment. At the same time, its high strength and rigidity also make it perform well in some occasions that require high-precision sealing.

5. Self-lubrication

Silicon carbide seals have a certain degree of self-lubrication, which can reduce friction and wear, and reduce the operating noise and energy consumption of the equipment. In some situations where lubricating oil or grease cannot be used, the self-lubrication of silicon carbide seals is particularly important.

2. Application field of silicon carbide seals

1). Chemical industry

In the chemical industry, due to the involvement of various corrosive media and high-temperature and high-pressure working environments, the performance requirements for seals are very high. With its good corrosion resistance, high temperature resistance and wear resistance, silicon carbide seals can meet the sealing needs of chemical equipment. For example, in reactors, centrifuges, pumps and other equipment, silicon carbide seals can effectively prevent medium leakage and improve the safety and reliability of the equipment.

2). Oil industry

Seals need to be used in drilling, oil production, oil refining and other links in the oil industry. The applications of silicon carbide seals in the petroleum industry mainly include wellhead devices, oil pumps, valves and other equipment. Due to the harsh working environment of the oil industry, the medium is corrosive and high-pressure, it is necessary to use high-performance seals to ensure the normal operation of the equipment. The excellent performance of silicon carbide seals makes it an ideal sealing material in the oil industry.

3). Metallurgical industry

High-temperature furnaces, steel-making furnaces, continuous casting machines and other equipment in the metallurgical industry need to operate in a high-temperature environment, and the requirements for the high-temperature resistance of seals are extremely high. Silicon carbide seals can work normally at temperatures up to 1600℃, so they are widely used in the metallurgical industry. In addition, the wear resistance and corrosion resistance of silicon carbide seals also enable it to adapt to the harsh working environment in the metallurgical industry.

4). Electric power industry

Turbines, generators, boilers and other equipment in the power industry need to use seals to prevent the leakage of steam, water and oil. The high-temperature resistance, high strength and rigidity of silicon carbide seals enable it to meet the sealing needs of the power industry. In nuclear power plants, the radiation resistance of silicon carbide seals also makes it an important sealing material.

5). Aerospace field

The aerospace field has very high requirements for the performance of materials, and it is necessary to use materials with high strength, high heat resistance, corrosion resistance and lightweight. Silicon carbide seals have been widely used in the aerospace field with their excellent performance. For example, in aircraft engines, rocket engines, satellites and other equipment, silicon carbide seals can effectively prevent the leakage of gas and liquid and improve the performance and reliability of the equipment.

In a word, silicon carbide seals play an important role in chemical industry, petroleum, metallurgy, electric power, aerospace and other fields with their excellent performance. With the continuous progress of science and technology and the continuous development of industry, the performance requirements for seals will become higher and higher. It is believed that silicon carbide seals will be more widely applied and developed in the future.