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Boron Carbide vs. Hexagonal Boron Nitride

Both boron carbide and hexagonal boron nitride are non-oxide engineering ceramics. There are 14 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is boron carbide and the bottom bar is hexagonal boron nitride.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 1710 to 2200
21 to 250
Elastic (Young's, Tensile) Modulus, GPa 240 to 460
14 to 60
Flexural Strength, MPa 170 to 410
18 to 140
Poisson's Ratio 0.17 to 0.19
0.11

Thermal Properties

Maximum Temperature: Mechanical, °C 1000 to 2500
1030 to 2350
Specific Heat Capacity, J/kg-K 950
840 to 1610
Thermal Conductivity, W/m-K 31 to 90
29 to 96
Thermal Expansion, µm/m-K 4.5 to 5.6
0.54 to 18

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 6.4
4.0 to 4.4
Electrical Resistivity Order of Magnitude, 10x Ω-m 0 to 11
13 to 15

Otherwise Unclassified Properties

Density, g/cm3 2.1 to 2.7
1.9 to 2.1

Common Calculations

Stiffness to Weight: Axial, points 63 to 100
4.1 to 18
Stiffness to Weight: Bending, points 91 to 100
42 to 69
Thermal Diffusivity, mm2/s 16 to 38
9.9 to 34