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Titanium Diboride vs. Silicon Nitride

Both titanium diboride and silicon nitride are non-oxide engineering ceramics. There are 15 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

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

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 3540
600 to 2950
Elastic (Young's, Tensile) Modulus, GPa 290
140 to 310
Flexural Strength, MPa 380
130 to 810
Fracture Toughness, MPa-m1/2 6.5
3.1 to 6.2
Poisson's Ratio 0.11
0.24 to 0.27

Thermal Properties

Maximum Temperature: Mechanical, °C 1270
1000 to 1330
Maximum Thermal Shock, °C 110
290 to 750
Specific Heat Capacity, J/kg-K 870
720 to 800
Thermal Conductivity, W/m-K 58
12 to 31
Thermal Expansion, µm/m-K 8.0
2.5 to 3.2

Electrical Properties

Electrical Resistivity Order of Magnitude, 10x Ω-m -6.5
11 to 12

Otherwise Unclassified Properties

Density, g/cm3 4.5
2.2 to 3.4

Common Calculations

Stiffness to Weight: Axial, points 35
34 to 53
Stiffness to Weight: Bending, points 49
65 to 78
Thermal Diffusivity, mm2/s 15
7.5 to 13