# Carbon-Carbon

Carbon-carbon is a non-oxide engineering ceramic. It has the lowest density among non-oxide engineering ceramics. In addition, it has a moderately low heat capacity and a moderately low thermal conductivity. The graph bars on the material properties cards below compare carbon-carbon to other non-oxide engineering ceramics (top) and the entire database (bottom).

## Mechanical Properties

Compressive (Crushing) Strength

240 *MPa* 34 *x 10 ^{3} psi*

Elastic (Young's, Tensile) Modulus

95 *GPa* 14 *x 10 ^{6} psi*

Poisson's Ratio

0.32

Shear Modulus

36 *GPa* 5.2 *x 10 ^{6} psi*

Tensile Strength: Ultimate (UTS)

19 *MPa* 2.7 *x 10 ^{3} psi*

## Electrical Properties

Electrical Conductivity: Equal Volume

0.090 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

0.48 *% IACS*

Electrical Resistivity Order of Magnitude

-5.0 *10 ^{x} Ω-m*

## Other Material Properties

Density

1.7 *g/cm ^{3}* 110

*lb/ft*

^{3}Specific Heat Capacity

760 *J/kg-K* 0.18 *BTU/lb-°F*

Thermal Conductivity

40 *W/m-K* 23 *BTU/h-ft-°F*

Thermal Expansion

4.0 *µm/m-K*

## Common Calculations

Stiffness to Weight: Axial

31 *points*

Stiffness to Weight: Bending

89 *points*

Strength to Weight: Axial

3.0 *points*

Strength to Weight: Bending

9.1 *points*

Thermal Diffusivity

31 *m ^{2}/s*

Thermal Shock Resistance

3.5 *points*

## Followup Questions

## Further Reading

Carbon Alloys: Novel Concepts to Develop Carbon Science and Technology, E. Yesuda et al. (editors), 2003

Carbon-Carbon Materials and Composites, John D. Buckley and Dan D. Edie, 1994