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SiAlON vs. Titanium Diboride

Both SiAlON and titanium diboride are non-oxide engineering ceramics. There are 20 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SiAlON and the bottom bar is titanium diboride.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 2620
3540
Elastic (Young's, Tensile) Modulus, GPa 290
290
Flexural Strength, MPa 680
380
Fracture Toughness, MPa-m1/2 6.3
6.5
Knoop Hardness 1700
2800
Poisson's Ratio 0.23
0.11
Tensile Strength: Ultimate (UTS), MPa 190
280

Thermal Properties

Maximum Temperature: Mechanical, °C 1200
1270
Maximum Thermal Shock, °C 300
110
Specific Heat Capacity, J/kg-K 880
870
Thermal Conductivity, W/m-K 19
58
Thermal Expansion, µm/m-K 3.6
8.0

Electrical Properties

Electrical Resistivity Order of Magnitude, 10x Ω-m 14
-6.5

Otherwise Unclassified Properties

Density, g/cm3 3.3
4.5

Common Calculations

Stiffness to Weight: Axial, points 50
35
Stiffness to Weight: Bending, points 67
49
Strength to Weight: Axial, points 16
17
Strength to Weight: Bending, points 22
21
Thermal Diffusivity, mm2/s 6.4
15
Thermal Shock Resistance, points 13
8.7