Density 3.25 g/cm3 (59% lower than steel)
Excellent wear ability
Max working temperature up to +800°C
Low coefficient of thermal expansion
High hardness up to Hv 1400
Nonmagnetic and electrical isolating
Self-lubricating
Applicable for high speed bearings
Excellent corrosion resistance
Technical Index
|
Item |
Unit |
Si3N4 |
ZrO2 |
Al2O3 99.5% |
SiC |
Bearing Steel |
|
Density |
g/cm3 |
3.23 |
6.05 |
3.92 |
3.12 |
7.85 |
|
Poisson’s Ratio |
/ |
0.26 |
0.3 |
0.22 |
0.17 |
0.3 |
|
Hardness |
MPa |
1500 |
1200 |
1650 |
2800 |
700 |
|
Flexural Strength(@R.T) |
MPa |
720 |
950 |
310 |
390 |
520 |
|
Fracture Toughness, K |
MPa·m1/2 |
6.2 |
10 |
4.2 |
3.9 |
25 |
|
Thermal Conductivity(@R.T) |
W/m·k |
25 |
2 |
26 |
120 |
40 |
|
Electrical Resistivity(@R.T) |
Ω·mm2/m |
>1013 |
>1015 |
>1016 |
>103 |
0.1-1 |
|
Max.Use temperature |
°C |
1050 |
750 |
1750 |
1550 |
300 |
|
Corrosion Resistance |
/ |
excellent |
excellent |
good |
excellent |
poor |
