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Silicon Nitride Bearings

Catalog No.CC0124
MaterialCeramic
Purity97%~99%
Density3.44 g/cm3

Silicon Nitride (SI3N4) is an ideal material for bearings. Ceramic bearings have good wear and corrosion resistance, and great mechanical strength under high temperature. We can supply full ceramic and hybrid bearings products made by Silicon Nitride, Zirconia as well as SiC. Bearings balls are also available!

More details

Silicon Nitride ceramic is ideal for bearing parts. Si3N4 bearing balls have already been applied in automobiles, rockets high speed engines, equipment working in corrosive environment and some performance model cars. Compared with steel, high performance ceramic balls have better mechanical properties under high temperature and could survive from most of corrosive chemicals. As the price of ceramic materials decreased, it could have more applications. 

 

Comparison of ceramic and Steel for bearings.

 

Si3N4

ZrO2

Steel

Working temperature

800 C

800 C

180 C

Density

3.24 g/cm3

6 g/cm3

7.8 g/cm3

Thermal expansion coeff.

3.4×10-6

10.5

12.5×10-6

Hardness, HV

1500

1300

About 750

Young’s Module

320 GPa

210 GPa

208 GPa

Corrosion resistance

Good

Good

Poor

Thermal conductivity

Low

Low

High

Magnetism

None

None

Yes

Wear resistance

Excellent

Excellent

Good



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