High Hardness and High Strength
The hardness of silicon nitride on the Mohs scale reaches 9 and above, and the hardness on the Vickers scale is 1600-1800 HV, which is close to the hardness of some superhard materials. The compressive strength of silicon nitride is also very high, typically reaching more than 1 GPa, allowing it to exhibit excellent wear and impact resistance in mechanical parts. In many high-speed and high-load mechanical systems, the service life of silicon nitride parts is significantly longer than that of traditional metal materials, and it is not easy to wear or break, which is especially suitable for key parts that need to remain stable for a long time.
Excellent Fracture
Toughness Fracture toughness is the ability of a material to resist fracture under impact or rapid loading. Ceramic materials are usually brittle, but the fracture toughness of silicon nitride reaches 5-10 MPa-m¹/², which is much higher than that of conventional ceramic materials such as alumina (about 3 MPa-m¹/²). This characteristic gives silicon nitride stability in extreme conditions, allowing it to withstand high mechanical shocks and loads, and is an ideal material for the manufacture of cutting tools and heavy engineering parts.
Compressive and Flexural
Strength The compressive strength of silicon nitride can reach 3000MPa, and the flexural strength is 600-800Mpa, which is significantly higher than most ceramic materials. The combination of compressive and flexural strength allows silicon nitride to maintain structural stability under high loads, so it has significant advantages in the production of bearings, ball bearings and other devices that must withstand high pressure. Compared with traditional metal bearings, silicon nitride bearings can maintain good performance in high-speed and high-temperature environments, are not subject to wear, and extend the service life of equipment.