# Beryllia vs. Carbon-carbon

Beryllia belongs to the oxide-based engineering ceramics classification, while carbon-carbon belongs to the non-oxide engineering ceramics. There are 17 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is beryllia and the bottom bar is carbon-carbon.

Metric UnitsUS Customary Units

## Mechanical Properties

Compressive (Crushing) Strength, MPa | 1650 | |

240 |

Elastic (Young's, Tensile) Modulus, GPa | 350 | |

95 |

Poisson's Ratio | 0.26 | |

0.32 |

Shear Modulus, GPa | 180 | |

36 |

Tensile Strength: Ultimate (UTS), MPa | 140 | |

19 |

## Thermal Properties

Maximum Temperature: Mechanical, °C | 1750 | |

2400 |

Specific Heat Capacity, J/kg-K | 1050 | |

760 |

Thermal Conductivity, W/m-K | 270 | |

40 |

Thermal Expansion, µm/m-K | 8.0 | |

4.0 |

## Electrical Properties

Electrical Resistivity Order of Magnitude, 10^{x} Ω-m |
13 | |

-5.0 |

## Otherwise Unclassified Properties

Density, g/cm^{3} |
2.9 | |

1.7 |

## Common Calculations

Stiffness to Weight: Axial, points | 67 | |

31 |

Stiffness to Weight: Bending, points | 82 | |

89 |

Strength to Weight: Axial, points | 14 | |

3.0 |

Strength to Weight: Bending, points | 21 | |

9.1 |

Thermal Diffusivity, mm^{2}/s |
89 | |

31 |

Thermal Shock Resistance, points | 3.6 | |

3.5 |