Machinable Glass-ceramic vs. CVD Diamond
Machinable glass-ceramic belongs to the glass and glass-ceramics classification, while CVD diamond belongs to the non-oxide engineering ceramics. There are 17 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 machinable glass-ceramic and the bottom bar is CVD diamond.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 67 | |
| 1050 |
| Fracture Toughness, MPa-m1/2 | 2.5 | |
| 5.5 |
| Poisson's Ratio | 0.29 | |
| 0.1 |
| Tensile Strength: Ultimate (UTS), MPa | 84 | |
| 750 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 790 | |
| 500 |
| Thermal Conductivity, W/m-K | 1.2 | |
| 1900 |
| Thermal Expansion, µm/m-K | 21 | |
| 1.0 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 6.4 | |
| 5.7 |
| Electrical Dissipation At 1 MHz | 0.0050 | |
| 0.00020 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 14 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.7 | |
| 3.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 170 |
| Stiffness to Weight: Bending, points | 51 | |
| 96 |
| Strength to Weight: Axial, points | 8.8 | |
| 59 |
| Strength to Weight: Bending, points | 16 | |
| 52 |
| Thermal Diffusivity, mm2/s | 0.56 | |
| 1080 |
| Thermal Shock Resistance, points | 4.3 | |
| 51 |