Carbon fiber is a kind of special fiber with carbon as the main component, which has the characteristics of general carbon materials and is a new material with excellent mechanical properties. Carbon fiber composite is a structural material made of carbon fiber and other matrix materials. Compared with ordinary carbon fiber materials, the properties of composite carbon fiber materials have been improved to a certain extent and are more widely used.
2. What are the carbon fiber composite materials?
Carbon fiber materials can be compounded with resin, metal, ceramics and other substrates to make different carbon fiber composites, which are common:
1, carbon fiber reinforced epoxy resin composites
The comprehensive indexes such as specific strength and specific modulus of this carbon fiber composite material are the highest among the existing structural materials, and it is widely used in aerospace materials, racing car body manufacturing and other fields.
2. Carbon fiber metal composites
Carbon fiber metal composite is a composite material made by plating metal on the surface of carbon fiber. Because carbon is not easy to be wetted by metal, it is easy to produce metal carbide at high temperature, so this material is difficult to manufacture, and is generally used to manufacture metal or alloy carbon fiber composites with low melting point. Commonly used carbon fiber metal composites include carbon fiber reinforced aluminum matrix composites and carbon fiber reinforced copper matrix composites.
3. Carbon fiber ceramic composites
Inorganic materials such as ceramics have many outstanding advantages in heat resistance, oxidation resistance, wear resistance, corrosion resistance and electrical properties, but their mechanical shock resistance and thermal shock resistance are poor. Composite materials made of carbon fiber and ceramics can greatly improve fracture work and thermal shock resistance, and improve the brittleness of ceramics. Ceramics can also protect carbon fiber from oxidation at high temperature, so it has high high temperature strength and elastic modulus.
4. Carbon fiber-carbon composites
It is a new special engineering material based on carbon or graphite and reinforced with carbon fiber or graphite fiber. It can withstand extremely high temperature and heating speed, and is used in aerospace and aviation to manufacture missile nose cones, spacecraft leading edges, supersonic aircraft brakes, etc.
5. Carbon fiber reinforced concrete composites
It consists of ordinary concrete with a small amount of carbon fiber and superfine additives (dispersant, defoamer, early strength agent, etc.). Compared with ordinary concrete, it not only has better mechanical properties, but also has many excellent characteristics, including greatly enhanced tensile strength, bending strength and impact resistance, reduced drying shrinkage and enhanced wear resistance.
3. What are the characteristics of carbon fiber composites?
1, with strong designability
The mechanical properties of carbon fiber composites are very strong. According to the corresponding products, their mechanical properties can meet the practical requirements and environmental conditions. Therefore, through careful material selection and matching control, the advantages of carbon fiber composites can be better brought into play to meet the needs of users.
Step 2 rely on
In fact, the structure of carbon fiber composites is constantly changing between physical and chemical reactions, and the construction performance of this composite depends on the processing parameters, methods and processes of various processes. Generally speaking, a high technical level is needed to control the process parameters well.
3. Compound effect
Carbon fiber composite is composed of carbon fiber and other basic materials. This kind of composite material needs to be processed, and the properties after processing are not a simple mixture of various materials, but need to form new characteristics according to the composite effect.
4. Identity
Carbon fiber composite is both a material and a structure. Traditional materials are used to process components, but this composite material of carbon fiber is completed at the same time of component molding, so the overall performance of this composite material is very good.