Silicon carbide powder for SiC pump ceramic repair agents
Ceramic parts such as SiC impellers and silicon carbide pump are often work in harsh environments and are subject to corrosion by corrosive and irritating substances. They will break and fall off after long-term use. For the repair of silicon carbide ceramics, high-purity silicon carbide powder can perform well. Silicon carbide particles have the following advantages as wear-resistant and corrosion-resistant ceramic repair agents:
1. Mechanical properties
– High hardness and wear resistance.
Silicon carbide powder has extremely high hardness, with a Mohs hardness of 9.2-9.3. When it is used as a repair agent aggregate in the pump body, it can effectively resist the erosion and wear of solid particles contained in high-speed flowing liquids. Under conditions of conveying abrasive media such as sand and gravel, it can significantly extend the service life of the pump body and reduce the damage and replacement frequency of the pump body caused by wear.
– High strength and impact resistance:.
Silicon carbide particles have high strength and can enhance the overall strength of the repair agent. During the operation of the pump body, the flow of liquid will generate a certain impact force. Silicon carbide particles can disperse and withstand these impact forces, prevent the repaired parts from cracking or falling off due to impact, and ensure the structural integrity and stability of the pump body.
2. Chemical properties
– Chemical stability.
Silicon carbide powder has good chemical stability and can resist the erosion of a variety of chemical substances. Whether it is acidic, alkaline or other corrosive media, silicon carbide can maintain relatively stable performance. Using a repair agent containing silicon carbide particles in a pump body that transports corrosive liquids can effectively prevent the pump body from corrion. In the meantime, improve the corrosion resistance of the pump body, and extend its service life in harsh chemical environments.
– Antioxidation.
Silicon carbide exhibits good oxidation resistance in high temperature or oxygen environments. During operation, the SiC pump may generate heat due to friction or come into contact with high temperature media. Silicon carbide particles can prevent the repair agent and pump body materials from being oxidized, maintain the stability of their performance, and reduce the degradation of material performance caused by oxidation.
3. Physical properties
– Thermal stability.
Silicon carbide has high thermal conductivity and low thermal expansion coefficient. High thermal conductivity helps the pump body dissipate heat during operation and avoids the deterioration of material properties due to excessive local temperature. The low thermal expansion coefficient allows the repair agent to match the thermal expansion behavior of the pump body material when the temperature changes, reducing cracks and damage caused by thermal stress, and ensuring the reliability of the repaired parts under different temperature environments.
– Low density.
Compared with some traditional metal repair materials, the density of silicon carbide powder is relatively low. The use of repair agents containing silicon carbide particles can reduce the weight of the pump body to a certain extent, reduce the energy consumption of the pump body during operation, and improve the operating efficiency of the pump.
4. Process performance
– Good compatibility.
Silicon carbide powder are well compatible with other components in the ceramic repair agent. During the preparation and construction of the repair agent, they can be evenly dispersed in the matrix to form a stable composite material. This is conducive to ensuring the consistency of the quality and performance of the repair agent and improving the repair effect.
– Easy to construct.
Repair agents containing silicon carbide particles usually have good fluidity and plasticity, which is convenient for construction personnel to operate. A variety of construction methods such as smearing and spraying can be used to easily repair various parts of the pump body and improve construction efficiency.
