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Yttria vs. Carbon-carbon

Yttria belongs to the oxide-based engineering ceramics classification, while carbon-carbon belongs to the non-oxide engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (12, 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 yttria and the bottom bar is carbon-carbon.

Metric UnitsUS Customary Units

Material Properties

Compressive (Crushing) Strength, MPa 390
240
Density, g/cm3 5.0
1.7
Elastic (Young's, Tensile) Modulus, GPa 120
95
Maximum Temperature: Mechanical, °C 2000
2400
Specific Heat Capacity, J/kg-K 440
760
Stiffness to Weight: Axial, points 13
31
Stiffness to Weight: Bending, points 32
89
Thermal Conductivity, W/m-K 0.3
40
Thermal Diffusivity, mm2/s 0.14
31
Thermal Expansion, µm/m-K 8.0
4.0