Why can silicon carbide be used as a wear-resistant additive for coatings?

Why can silicon carbide be used as a wear-resistant additive for coatings?
The advantages of silicon carbide as a wear-resistant additive for coatings come from its unique physical and chemical properties, which can be analyzed in the following five dimensions:
1. High hardness characteristics
The Mohs hardness of silicon carbide is 9.2-9.4, second only to diamond, and its crystal structure can effectively resist wear. After adding micropowder, a dense protective layer can be formed on the surface of the coating, which significantly improves wear resistance and is suitable for high-frequency friction scenarios such as floor paint and industrial equipment.
2. Optimization of particle characteristics
‌Particle size concentration distribution‌: Silicon carbide micropowder has a high particle size concentration, which can form a uniform coating during spraying, reduce surface defects, and enhance coverage and adhesion.
3. Adaptability to extreme environments
‌High temperature resistance‌: Silicon carbide remains structurally stable at a high temperature of 1600℃, and is suitable for the protection of high-temperature equipment such as boilers and engine parts.
‌Corrosion resistance‌: Silicon carbide has strong tolerance to chemical media such as acids, alkalis, and salts, and can extend the service life of chemical equipment and marine engineering coatings.
4. Improved overall performance
‌ Enhanced mechanical strength‌: The high toughness of silicon carbide particles can improve the impact strength of the coating, and the compressive strength of the building structure coating can be increased by more than 30%.
‌ Improved thermal conductivity‌: The thermal conductivity of silicon carbide is as high as 120W/m·K, which helps the electronic equipment coating to achieve rapid heat dissipation.
5. Cost optimization mechanism
As a functional filler, silicon carbide can reduce the amount of resin by 20-30%, and at the same time has a thickening and matting effect, reducing the cost of raw materials while ensuring performance. For example, in ship anti-corrosion coatings, replacing part of the resin with silicon carbide can reduce the overall cost by 15%-20%.