Material Characteristic
The short fibre lengths are bonded with a phenolic resin. The composite is carbonised to 2000°C and degassed to approx. 1 mbar. The even distribution of the carbon bond gives the C.B.C.F a completely homogeneous nature.
The homogeneous nature of Calcarb C.B.C.F. facilitates machining, providing a clean evenly cut surface which enables adhesion of both painted and foil finishes.
| Element ppm | CBCF | Purifed CBCF | D | HD | CVD24 | CDV100 | Limits ppm |
|---|---|---|---|---|---|---|---|
| Aluminium | 17.3 | <0.05 | 11.2 | 6.2 | 10.3 | 6.6 | 0.05 |
| Barium | 2.58 | <0.005 | 3.33 | 0.49 | 1.62 | 0.64 | 0.005 |
| Beryllium | <0.005 | <0.005 | <0.005 | <0.005 | <0.005 | <0.005 | 0.005 |
| Cadmium | <0.005 | <0.005 | <0.005 | <0.005 | <0.005 | <0.005 | 0.005 |
| Calcium | 143 | 0.4 | 178 | 58.3 | 60.7 | 25.9 | 0.05 |
| Chronium | 8.83 | <0.01 | 5.59 | 0.82 | 3.9 | 0.2 | 0.01 |
| Cobalt | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | 0.01 |
| Copper | 0.02 | <0.01 | 0.02 | 0.01 | 0.01 | <0.01 | 0.01 |
| Iron | 3.71 | 0.08 | 1.62 | 2.033 | 1.65 | 1.3 | 0.02 |
| Lead | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | 0.01 |
| Magnesium | 0.09 | 0.07 | 0.04 | 0.05 | 0.15 | 0.24 | 0.01 |
| Manganese | 0.02 | <0.005 | 0.04 | 0.01 | 0.01 | 0.01 | 0.005 |
| Molybdenum | 0.46 | <0.01 | 0.35 | 0.23 | 0.37 | 0.24 | 0.01 |
| Nickel | 0.76 | <0.02 | 0.25 | 0.36 | 0.47 | 0.04 | 0.02 |
| Potassium | <2.00 | <2.00 | <2.00 | <2.00 | <2.00 | <2.00 | 2.00 |
| Phosphorus | 4.9 | 0.3 | 5.4 | 2.3 | 3.2 | 1.5 | 0.1 |
| Silver | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | 0.01 |
| Sodium | 0.644 | <0.01 | 0.55 | 0.37 | 0.34 | 0.4 | 0.1 |
| Strontium | 1.13 | <0.01 | 1.05 | 0.4 | 0.81 | 0.18 | 0.01 |
| Vanadium | 0.55 | <0.01 | 0.73 | 0.16 | 0.24 | 0.16 | 0.01 |
| Zinc | 0.04 | <0.01 | 0.01 | 0.01 | 0.01 | 0.04 | 0.01 |
| Sulphur# | 150 | <20 | 135 | 110 | 140 | 42 | 20 |
| Silicon* | 43 | <2.0 | 48 | 39 | 32 | 22 | 2 |
| Total Ash | 489 | 2.4 | 558 | 643 | 369 | 2250 | - |
| Calcarb C.B.C.F. (Cylinder) | Calcarb C.B.C.F. (Board) | Calcarb D: (Board) | Calcarb HD: (Board) | |
|---|---|---|---|---|
| Bulk Density g/cm3 | 0.14 +/- 0.02 | 0.17 +/- 0.02 | 0.25 +/- 0.03 | 0.40 +/- 0.05 |
| Porosity ‰ Vol | 80 | 85 | 35 | 79 |
| Mean pore radius mm | 22 | 17 | 6 | 25 |
| Carbon content wt ‰ | >99.95 | >99.97 | >99.97 | >99.95 |
| Ash content wt‰ | <0.05 | <0.03 | <0.03 | <0.05 |
| Compressive strength MPa parallel to fibre orientation perpendicular to fibre orientation |
0.80 0.20 |
1.03 0.76 |
2.10 1.07 |
3.20 2.30 |
| Flexural strength MPa parallel to fibre orientation perpendicular to fibre orientation |
1.50 0.20 |
1.03 0.15 |
2.70 0.62 |
2.32 1.45 |
| Electrical resistivity - ohm.m parallel to fibre orientation perpendicular to fibre orientation |
2.50 x 10-3 7.40 x 10-3 |
1.10 x 10-3 4.07 x 10-3 |
5.90 x 10-4 15.93 x 10-4 |
2.0 x 10-4 4.0 x 10-4 |
| Coefficient of thermal expansion x 10-6 0 - 1000oC 1000oC - 2000oC |
3.0 +/- 0.3 2.6 +/- 0.3 |
3.0 +/- 0.3 2.6 +/- 0.3 |
3.0 +/- 0.3 2.6 +/- 0.3 |
3.0 +/- 0.3 2.6 +/- 0.3 |
| Rec'mnd Max Service Temp Limits oC Vacuum-dependent on system pressure | 3000 | 3000 | 3000 | 3000 |
| Argon | 3000 | 3000 | 3000 | 3000 |
| Nitrogen | 1700 | 1700 | 1700 | 1700 |
| Oxygen | 500 | 500 | 500 | 500 |
| Carbon Dioxide | 800 | 800 | 800 | 800 |
| Hydrogen | 1100 | 1100 | 1100 | 1100 |
| Steam | 700 | 700 | 700 | 700 |
| Moisture Adsorption - wt % Maximum after 6 months at ambient conditions: | <0.01 | <0.01 | <0.01 | <0.05 |
