Application fields of carbon/carbon composite materials

Since its invention in the 1960s, the carbon-carbon C/C composites have received great attention from the military, aerospace, and nuclear energy industries. In the early stage, the manufacturing process of carbon-carbon composite was complex, technically difficult, and the preparation process was long. The cost of product preparation has remained high for a long time, and its use has been limited to some parts with harsh working conditions, as well as aerospace and other fields that cannot be replaced by other materials. At present, the focus of carbon/carbon composite research is mainly on low-cost preparation, anti-oxidation, and diversification of performance and structure. Among them, the preparation technology of high-performance and low-cost carbon/carbon composites is the focus of research. Chemical vapor deposition is the preferred method for preparing high-performance carbon/carbon composites and is widely used in the industrial production of C/C composite products. However, the technical process takes a long time, so the production cost is high. Improving the production process of carbon/carbon composites and developing low-cost, high-performance, large-size, and complex-structure carbon/carbon composites are the key to promoting the industrial application of this material and are the main development trend of carbon/carbon composites.

Compared with traditional graphite products, carbon-carbon composite materials have the following outstanding advantages:

1) Higher strength, longer product life, and reduced number of component replacements, thereby increasing equipment utilization and reducing maintenance costs;

2) Lower thermal conductivity and better thermal insulation performance, which is conducive to energy saving and efficiency improvement;

3) It can be made thinner, so that existing equipment can be used to produce single crystal products with larger diameters, saving the cost of investing in new equipment;

4) High safety, not easy to crack under repeated high temperature thermal shock;

5) Strong designability. Large graphite materials are difficult to shape, while advanced carbon-based composite materials can achieve near-net shaping and have obvious performance advantages in the field of large-diameter single crystal furnace thermal field systems.

At present, the replacement of special graphite products such as isostatic graphite by advanced carbon-based composite materials is as follows:

The excellent high temperature resistance and wear resistance of carbon-carbon composite materials make them widely used in aviation, aerospace, energy, automobiles, machinery and other fields.

The specific applications are as follows:

1. Aviation field: Carbon-carbon composite materials can be used to manufacture high-temperature parts, such as engine jet nozzles, combustion chamber walls, guide blades, etc.

2. Aerospace field: Carbon-carbon composite materials can be used to manufacture spacecraft thermal protection materials, spacecraft structural materials, etc.

3. Energy field: Carbon-carbon composite materials can be used to manufacture nuclear reactor components, petrochemical equipment, etc.

4. Automobile field: Carbon-carbon composite materials can be used to manufacture braking systems, clutches, friction materials, etc.

5. Mechanical field: Carbon-carbon composite materials can be used to manufacture bearings, seals, mechanical parts, etc.