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Hafnia vs. Boron Carbide

Hafnia belongs to the oxide-based engineering ceramics classification, while boron carbide belongs to the non-oxide engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (11, 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 hafnia and the bottom bar is boron carbide.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 9.7
2.1 to 2.7
Elastic (Young's, Tensile) Modulus, GPa 57
240 to 460
Electrical Resistivity Order of Magnitude, 10x Ω-m 9.0
0 to 11
Maximum Temperature: Mechanical, °C 2800
1000 to 2500
Specific Heat Capacity, J/kg-K 120
950
Stiffness to Weight: Axial, points 3.3
63 to 100
Stiffness to Weight: Bending, points 13
91 to 100
Thermal Conductivity, W/m-K 1.1
31 to 90
Thermal Diffusivity, mm2/s 0.95
16 to 38
Thermal Expansion, µm/m-K 6.0
4.5 to 5.6