On November 6th, at the biennial Zhuhai Air Show, the CR929, a 280 long-range wide-body aircraft developed by China and Russia, made its debut at the International Air Show with a 1:1 display prototype. Composites are expected to exceed 50% in this latest generation of large aircraft. Similarly, on the C919, which flew for the first time on May 5 last year, composite materials used accounted for 12% of the structural weight of the aircraft. The composite material here is mainly carbon fiber composite material.
According to aviation experts, in order to improve the advanced nature and environmental protection of aircraft, carbon fiber composite materials are currently the main means of aircraft lightweighting, and also the mainstream trend in the future. Due to its light weight, high strength, fatigue resistance, corrosion resistance, good molding process and low cost, the large application of carbon fiber composite materials in aviation equipment can effectively improve performance, reduce structural weight, reduce operating costs and enhance market competition. Force, therefore, more and more applications in aircraft structures.
"The amount and application of carbon fiber composite materials on aircraft has become an important indicator to measure the advanced structure of aircraft. It is also an important reference indicator for airlines to purchase aircraft. The development of aerospace composite materials technology has become the consensus of domestic and foreign aviation manufacturers. Zhong Yu, head of the new materials company Kangde Group, believes.
In addition to the aviation field, many composite rocket shells are also made of carbon fiber. On high-end sports cars, carbon fiber is a major advanced material. According to experts, carbon fiber is an inorganic polymer special fiber with a carbon content of more than 90%. Compared with titanium, steel, aluminum and other metal materials, carbon fiber has small specific gravity, high strength, large modulus, high temperature resistance and friction resistance. Excellent performance such as corrosion resistance and soft workability of fibers. The current commercial use of carbon fiber is clearer than the other “carbonaceous” “magical material” graphene.
Zhong Yu said that as one of the important strategic materials in the high-end technology and industrial fields, the core industrialization technology and supporting key equipment of carbon fiber can only be obtained through independent research and development and long-term engineering practice. Through unremitting efforts, domestic high-performance carbon fiber has made great breakthroughs in basic research, engineering and industrialization, and has developed rapidly. For example, Zhongdexin's independent research and development has mastered the core technology of high-performance carbon fiber manufacturing, and its related testing technology has been approved by the National Laboratory of CNAS (China National Accreditation Service for Conformity Assessment).
With the explosion of demand for carbon fiber in aerospace, automotive lightweight, wind power, rail transit and other industries, carbon fiber industrial applications have begun to enter large-scale production. The industry predicts that by 2020, global carbon fiber demand will exceed 160,000 tons, and by 2025, it will exceed 330,000 tons. Zhong Yu believes that for such a huge and important market, domestic enterprises must not only achieve key technologies to achieve stable mass production and large-scale engineering application of carbon fiber, but also aim at early development and layout of domestically produced new generation carbon fiber and composite materials. , thus firmly standing in the global high-end carbon fiber market.