Nano SiC powder particles have good compatibility in polymer composite materials, good dispersion and good basic bonding, the tensile strength of modified high-strength nylon alloy is more than 100% higher than that of ordinary PA6, and the wear resistance is improved by more than 2.5 times. Users have responded well. It is mainly used for polymer parts of armored tracked vehicles, automobile steering parts, textile machinery, mining machinery lining plates, train parts, etc. It can be densified by sintering at a lower temperature. The nano-silicon carbide after surface treatment with coupling agent can greatly improve and improve the wear resistance of PEEK when the addition amount is about 10%. (The wear mode of PEEK filled with micron-sized silicon carbide is mainly pear cutting and abrasive wear, while the wear mode of PEEK filled with nano-sized silicon carbide is mainly slight adhesion transfer wear).

Adding a certain amount of nano-silicon carbide can improve the wear resistance by 15%-30% without changing the original rubber formula for modification treatment, without reducing its original performance and quality. In addition, nano-silicon carbide is used in rubber rubber rollers, printer fixing films and other rubber products such as wear resistance, heat dissipation, and temperature resistance.

2 Nano-SiC composite coating on metal surface, etc.

The second mixed particles of nano-sized particles are used, and nickel is used as the matrix metal to form an electrodeposited composite coating with high density and very good bonding force on the metal surface. High temperature resistance characteristics. The microhardness of the composite coating is greatly improved, the wear resistance is increased by 3-5 times, the service life is increased by 2-4 times, the bonding force between the coating and the substrate is increased by 30-40%, the covering ability is strong, and the coating is uniform, smooth and detailed.

3 Applications in the electronics industry

Using the high thermal conductivity and high insulation of SiC materials, it is used as a substrate and packaging material for large-scale integrated circuits in the electronics industry. SiC nano-fine powder is an ideal raw material for high-temperature structural ceramics. It can be used as rotors, nozzles, burners of high-temperature gas turbines, heat exchanger components of high-temperature gas, cylinders and pistons of engines, etc., as well as nuclear reactor materials and rocket head radar antennas. cover etc.

Application Scope and Prospect of 4nm SiC in Composite Materials

Defense Improved Armor, Bearings, Engine Burners, High Performance Radar Antenna Materials and Infrared Fairings, Low Energy Components, Helicopter and Jet Aircraft Parts, etc.
Environmental protection systems and components for harsh environments, filters and scrubbers, radiant tubes and incinerators, wastewater treatment systems, etc.
Aviation bearings, burner cells, fuel systems and valves, high-temperature electrical auxiliary components (such as cover of rotating parts on starters, frames, thermal insulation systems, turbine components), etc.
Automotive catalytic converters, driving system components, through-flow heaters with fixed boundaries, fuel injectors, internal combustion engines and other heat engine parts with low heat discharge, valves and other chemical actuators and igniters, mechanical caps, nozzles, radiant tubes and Burners, co-flow heaters, gasoline reforming crackers, refractory materials, valves, etc.
Electronics Industry High-performance multilayer integrated chip packaging, multilayer capacitors, pressure and gas sensors, substrates, etc.
Energy bearings, ceramic steam turbines, cogeneration devices, filters, batteries (solid oxides), high temperature structural components, flow control valves, petroleum refining heaters, etc. Bioceramic artificial teeth, bones, joints, etc.

5 Conclusion
SiC nanomaterials have more excellent properties than traditional SiC materials, and can meet the strict requirements of high-tech fields. As a nanostructured material with a wide range of uses, it is very meaningful to conduct in-depth and extensive research on it. The purity of nano-SiC is 99.9% higher, the particle size is 50-100nm (small particle size distribution range (30-100nm, can be customized)) and the specific surface area is 40-50.

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