Silicon carbide ceramics are widely used in machinery, aerospace, electronics and other fields due to their excellent wear resistance. Its unique physical and chemical properties enable it to maintain stable performance under extreme conditions.

Silicon carbide ceramics, silicon carbide wear-resistant ceramics, reaction-sintered silicon carbide

Basic properties of silicon carbide ceramics

Silicon carbide (SiC) is a compound composed of silicon and carbon, with high hardness, high thermal conductivity and excellent chemical stability. Silicon carbide ceramic wear-resistant parts are usually prepared by reaction sintering, with high density and excellent wear resistance.

Wear resistance indicators of silicon carbide ceramics

1. Hardness

Hardness is one of the key indicators to measure the wear resistance of materials. The Mohs hardness of silicon carbide ceramics can reach 9-9.5, which is much higher than common metal and plastic materials. This makes silicon carbide ceramics perform well in wear and impact environments.

2. Compressive strength

Compressive strength refers to the ability of a material to resist damage under pressure. The compressive strength of silicon carbide ceramics is usually between 250-400 MPa, with good load-bearing capacity, suitable for heavy loads.

3. Wear resistance rate

The wear resistance rate refers to the rate of material loss during friction. The wear resistance of silicon carbide ceramics is extremely low, usually between 0.1-0.5 mm³/N·m, which enables it to maintain a long service life in high-wear environments.

4. Thermal stability

Silicon carbide ceramics have excellent thermal stability and can maintain their performance unchanged in high-temperature environments. Its low thermal expansion coefficient is suitable for high-temperature and rapid cooling and heating applications.

5. Chemical stability

Silicon carbide ceramics have good corrosion resistance to chemicals such as acids and alkalis, and can be used for a long time in harsh chemical environments. This feature makes it widely used in chemical industry, metallurgy and other fields.

Advantages of reaction-sintered silicon carbide wear-resistant parts

Reaction-sintered silicon carbide wear-resistant parts are prepared by high-temperature reaction sintering process and have higher density and uniformity. This preparation method can effectively improve the wear resistance and crack resistance of the material and further broaden its application range.