A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention provides a preparation method of a carbon/carbon brake disc. The preparation method comprises three stages including CVI (chemical vapor infiltration) early-stage compaction, CVI middle-stage compaction and CVI late-stage compaction. In the compaction process, the compaction speed needs to be reasonably controlled; the influence of too high compaction speed on the final density of the subsequent compaction and the carbon/carbon brake disc is prevented; or the influence of too low compaction speed on the manufacturing period of the carbon/carbon brake disc is prevented. By regulating the technical parameters, the compaction speed is controlled at the compactness increase value being 0.2 to 0.4g/cm<3> per hundred hours in the three compaction stages, so that the final density of the carbon/carbon brake disc can reach higher than 1.80/cm<3>. Pyrolytic carbon formed by the method provided by the invention is of an amorphous rough body structure. The amorphous rough body pyrolytic carbon can absorb water vapor in the air and can maintain the water vapor in the air; the friction membrane can be easily formed; the abrasion of the carbon/carbon brake disc can be greatly reduced through the formation of the friction membrane.
The invention provides a preparation method of a carbon/carbon brake disc. The preparation method comprises three stages including CVI (chemical vapor infiltration) early-stage compaction, CVI middle-stage compaction and CVI late-stage compaction. In the compaction process, the compaction speed needs to be reasonably controlled; the influence of too high compaction speed on the final density of the subsequent compaction and the carbon/carbon brake disc is prevented; or the influence of too low compaction speed on the manufacturing period of the carbon/carbon brake disc is prevented. By regulating the technical parameters, the compaction speed is controlled at the compactness increase value being 0.2 to 0.4g/cm<3> per hundred hours in the three compaction stages, so that the final density of the carbon/carbon brake disc can reach higher than 1.80/cm<3>. Pyrolytic carbon formed by the method provided by the invention is of an amorphous rough body structure. The amorphous rough body pyrolytic carbon can absorb water vapor in the air and can maintain the water vapor in the air; the friction membrane can be easily formed; the abrasion of the carbon/carbon brake disc can be greatly reduced through the formation of the friction membrane.
Modified slurry for carbon-carbon brake disc and preparation method of carbon-carbon brake disc
| European Patent Office | 2020
Preparation method of carbon/carbon composite material brake disc
| European Patent Office | 2022