Sintered silicon carbide is an important ceramic material, which is widely used in industrial equipment and parts under severe working conditions such as high temperature, high pressure, and high speed. The mechanical performance parameters of sintered silicon carbide mainly include hardness, strength, toughness, fracture toughness and so on.

1. Hardness

Hardness is an important indicator of the mechanical properties of sintered silicon carbide. Sintered silicon carbide has extremely high hardness, close to that of diamond. Its hardness can reach 2400-2800kg/mm², which is 4-5 times that of metal materials and far exceeds that of traditional ceramic materials. This makes sintered silicon carbide have excellent anti-wear performance, and can operate under high-speed rotation and high-load conditions for a long time without wear and damage.

2. Strength

Strength is a measure of a material's ability to resist external forces. The compressive strength of sintered silicon carbide can reach 450-550MPa, and the tensile strength can reach 60-70MPa, much higher than ordinary ceramic materials. The strength of sintered silicon carbide improves the service life of the material and enables it to withstand working in harsh environments such as high temperature and high pressure.

3. Toughness

Toughness is the ability of a material not to break under the action of an external force. The fracture toughness of sintered silicon carbide can reach 3-4MPa·m1/2. This means that under the action of external forces such as shock or vibration, sintered silicon carbide can delay the occurrence of fracture and withstand certain deformation. This makes sintered silicon carbide effective against cracking and failure in applications such as high-speed rotors, pipes, mechanical seals, etc.

4. Thermal stability

Sintered silicon carbide has good thermal stability and can be used at high temperatures for a long time without significant deformation or cracking. Its heat resistance can usually reach above 1500°C, and it can even be used for a long time in an oxidizing atmosphere.

5. Thermal conductivity

Sintered silicon carbide has excellent thermal conductivity, and its thermal conductivity is usually between 100 and 200 W/m·Kelvin. This makes sintered silicon carbide have good heat dissipation performance at high temperatures, and is suitable for some occasions that require rapid heat dissipation

The excellent mechanical properties of silicon carbide make sintered silicon carbide an indispensable material in many industrial fields, which can effectively cope with various harsh working environments and provide more choices for engineers and scientific researchers.