|
Mechanical and Physical Properties of
Some Common Engineering Ceramics in Comparison with
Hardmetal and Stainless Steel |
|
| |
Silicon
Nitride
Si3N4 |
Zirconia
Y-stabilised
ZrO2(Y2O3) |
Silicon
Carbide
SiC |
Aluminium
Titanate
Al2TiO5 |
Titanium
Diboride
TiB2 |
Aluminium
Nitride
AlN |
Aluminium
Oxide
Al2O3 |
Hard-
metal
WC/Co |
Stainless
Steel |
Bending
Strength
(MPa) |
800 |
1000 |
400 |
30 |
600 |
350 |
350 |
2500 |
200 (sy)
490 (sr)
|
Compressive
Strength (MPa) |
3000 |
2200 |
2200 |
200 |
3000 |
1900 |
4100 |
5000 |
200 (sy)
490 (sr) |
E-modulus
(GPa) |
300 |
210 |
400 |
20 |
570 |
310 |
390 |
600 |
200 |
Vickers
Hardness (GPa) |
15.7 |
12.3 |
24.5 |
3.7 |
21.6 |
11.8 |
17.7 |
13.7 |
2.0 |
Fracture
Toughness
Klc (MPa·m1/2) |
6.5
9 |
10.5 |
4.0 |
1.0 |
5.0 |
3.7 |
4.5 |
12 |
~50 |
Resistivity
(ohm·cm) |
1014 |
25·1012 |
10-1 |
--- |
1.5·10-7 |
1014 |
1014 |
20·10-6 |
10-4 |
| Thermal
Expansion (10-6K-1) |
2.5 |
10.5 |
3.5 |
1.0 |
7.2 |
4.5 |
7.5 |
5.0 |
16.8 |
Thermal
Conductivity
(Wm -1K-1) |
25 |
1.5 |
100 |
1.4 |
110 |
150 |
30 |
95 |
15 |
Thermal
Shock Resistance
DT
(°C) |
700 |
200 |
200 |
1200 |
110 |
190 |
80 |
635 |
--- |
Density
(g/cm3) |
3.2 |
5.9 |
3.2 |
3.4 |
4.4 |
3.3 |
3.95 |
15.0 |
7.9 |
