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Carbon fiber has the characteristics of high strength and low density, and also has a certain wear resistance, with the right materials and processes can achieve high surface quality and high performance. The following data can be used for reference.
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The characteristics of carbon fiber composites are as follows:
1. Lightweight
The density of the lightweight material aluminum alloy is, while the density of carbon fiber composite material is about half. However, the tensile strength of carbon fiber composites can be reached, more than three times higher than that of aluminum alloys.
2. Versatility
Carbon fiber composites have been developed over the years to combine many excellent physical, mechanical, biological and chemical properties. For example, heat resistance, flame retardancy, shielding, wave absorption, semiconductivity, superconductivity, etc. Moreover, the composition of different advanced composite materials is different, and there are certain differences in their functionality.
3. Maximize economic benefits
The application of carbon fiber composites in equipment can reduce the number of parts in the product. Since the connection of complex parts does not require riveting and welding, the demand for connected parts is reduced. Effectively reduces assembly material costs, assembly and connection times, further reducing costs.
4. Structural integrity
Carbon fiber composite materials can be processed into integral parts, that is, carbon fiber composite parts can replace several metal parts. For some parts with special contours and complex surfaces, it is less feasible to manufacture them with metal, and the use of carbon fiber composites can well meet the actual needs.
5. Designability
The composite structure of resin and carbon fiber can be used to obtain composite materials with different shapes and properties. For example, by selecting the right material and layering program, it is possible to process carbon fiber composite products with zero expansion coefficient. And the size and stability of carbon fiber composite materials are better than those of traditional metal materials.
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The main use of carbon fiber is to compound with resins, metals, ceramics and other matrices to make structural materials. The comprehensive indexes of specific strength and specific modulus of carbon fiber reinforced epoxy resin composites are the highest among existing structural materials. In the field of density, stiffness, weight, fatigue characteristics and other strict requirements, in the occasion of high temperature and high chemical stability, carbon fiber composite materials are quite advantageous.
Carbon fiber was produced in the early 50s in response to the needs of cutting-edge science and technology such as rocketry, aerospace and aviation, and is now widely used in sports equipment, textiles, chemical machinery and medicine. With the increasingly demanding requirements of cutting-edge technology for the technical performance of new materials, scientific and technological workers are constantly striving to improve. In the early 80s, high-performance and ultra-high-performance carbon fibers appeared, which was another technological leap forward and marked an advanced stage in the research and production of carbon fiber.
Composites made from a combination of carbon fiber and epoxy resin are an advanced aerospace material due to their low specific gravity, good rigidity and high strength. This is because for every 1 kilogram reduction in the weight of a space vehicle, a 500-kilogram reduction in the weight of the launch vehicle can be achieved. As a result, advanced composites are being used in the aerospace industry.
There is a vertical take-off and landing fighter, and the carbon fiber composite material used in it has accounted for 1 4 of the weight of the whole aircraft and 1 3 of the weight of the wing. According to reports, the key components of the three rocket thrusters on the US space shuttle, as well as the advanced MX missile launch tubes, are all made of advanced carbon fiber composite materials.
Today's Formula 1 (Formula One World Championship) cars are made of carbon fiber for most of the body structure. One of the main selling points of the top sports car is the use of carbon fibre throughout the body to improve aerodynamics and structural strength.
Carbon fiber can be processed into fabrics, felts, mats, belts, paper and other materials. In addition to being used as thermal insulation materials, carbon fiber in traditional use is generally not used alone, but is mostly added to resin, metal, ceramic, concrete and other materials as reinforcing materials to form composite materials. Carbon fiber-reinforced composites can be used as structural materials for aircraft, electromagnetic shielding and de-energizing materials, artificial ligaments and other body substitute materials, as well as in the manufacture of rocket shells, motor boats, industrial robots, automotive leaf springs and drive shafts, etc.
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Carbon fiber applications.
1.Aerospace, aircraft shells and interior equipment can be finished with carbon fiber, the same strength, lighter than alloys, fuel saving.
2.Wind power generation, the blades of the generator are made of carbon fiber + glass fiber, power environmental protection, one of the directions of future energy.
3.In the sports market, high-end products such as golf shafts, tennis rackets, trekking poles, bicycles, skis, skates, fishing rods, diving tanks, etc., are made of carbon fiber.
4.Car parts, shells, frames, aerodynamic parts, seats, interiors and even wheels can all be made of carbon fiber, which also belong to the high-end market.
5.Building reinforcement, carbon fiber chopped wire can be used in concrete to strengthen the role of reinforcement.
6.In the popular market, because carbon fiber can be produced with a high-end appearance, it is also favored in the fields of soles, cufflinks, belt buckles, high-end tobacco and alcohol packaging, electronic product shells, etc., but the amount is small, and they are all high-end products.
7.**In the field, violins, guitars, flutes, and other musical instruments and speakers are made of carbon fiber The effect is very amazing.
8.Others: Helmets, mouse pads, glasses frames, tripods, watches, etc. are also used.
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1.Poor abrasion resistance. After the carbon fiber is formed, the toner can be ground directly with ordinary sandpaper. So the carbon fiber products you can buy have hard-wearing paint or other materials on the surface.
2.Poor lateral impulse resistance. For example, golf clubs can break when the middle of the shaft hits a hard object.
In the event of a collision, the carbon fiber shell will break in fragments, absorbing energy and protecting passengers.
3.**Higher. There are two reasons for this:
a There are not many manufacturers that can produce stable raw materials, and the output is limited. It is mainly ordered by aircraft manufacturing companies and military institutions, and the remaining production capacity will be used for civilian use. b The process is complex, it needs to be heated and formed-the oven consumes electricity, the cost of mold opening is higher, and the machinery is more expensive, and the production line of the golf shaft needs about 150w input.
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**Relatively high and not easy to use**.
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The first two points listed upstairs can not be regarded as the shortcomings of carbon fiber composite materials, compared with other composite materials, it should be regarded as an advantage, the wear resistance and mechanical strength of carbon fiber composite materials are much higher than other composite materials, and the advantages of this material itself cannot be denied by some defective formulas and processes.
The last point may be its drawback, but no matter how expensive it is, it is currently in short supply.
There are no flaws in materials, only flaws in design and application.
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Pure carbon fiber products are too brittle and brittle, which is a serious disadvantage, and the solution is to combine it with other materials, such as aramid, etc.
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At present, there are no shortcomings, and those who say that he has shortcomings are dealers of Opple bath bombs. Because they didn't have this one, they said he was not good, but Aopu Company began to develop and produce, and changed its name to carbon crystal bath bomb. In fact, carbon fiber is carbon crystal.
The people of Aopu have already said that carbon fiber is not good, so it can't be called carbon fiber, only carbon crystal. It's just like the ceiling of her house is called a bath ceiling, not an integrated ceiling!
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Compared with steel, the advantages of carbon fiber composite materials are not to mention, and there are also disadvantages, as follows:
1. Lack of ductility. For example, when the carbon fiber cloth reinforcement of Hummer is pasted, when the force of the carbon fiber cloth is greater than its limit, it will break directly, while the steel is malleable and will be stretched or bent.
2、**。Compared with steel, the advantage is still not obvious.
3. Quality. The quality of carbon fiber cloth and inferior and basalt fiber cloth is very different. It takes a professional to be able to distinguish between them.
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Relatively high and not easy to utilize.
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