Eight key aviation material technologies of the ho

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Eight key aviation material technologies of large aircraft have settled in Xi'an Yanliang base

although China's large aircraft project is still in the start-up stage of feasibility study, key technologies such as aviation materials are being reserved. Yesterday, the morning post learned that a number of aviation material technologies have been settled in Xi'an Yanliang national aviation technology industry base. Aviation experts pointed out that aviation materials, engines and airborne equipment are called the three key technologies of the large aircraft project

it is understood that this batch of aviation material technologies settled in the aviation industry base include eight key technologies: ceramic matrix composite application technology of academician Zhang Litong, high-performance carbon fiber technology of the Fourth Research Institute of China Aerospace Science and Technology (11.13, -0.04, -0.36%, bar) Group Corporation, and inorganic polymer material technology with Academician Cao Chunxiao as the core of the technical team. Among them, the continuous fiber toughened silicon carbide ceramic matrix composite developed through the application technology of ceramic matrix composite is lighter than aluminum and harder than steel. It has the properties of high temperature resistance, high strength, oxidation resistance, corrosion resistance and wear resistance. It can be used instead of metal in the destruction and deformation of low-carbon steel and cast iron in aerospace inspection, and solve the problem of aerospace fuel waste to a certain extent

carbon fiber is an important material for advanced aircraft bodies in the world, while China's civil aircraft companies have achieved the transformation from a single main industry to a multi main industry, and the proportion of carbon fiber used in the body is less than 1%. After the high-performance carbon fiber technology is put into operation in the aviation base, it will completely reverse the passive situation of China's aviation carbon fiber dependence on imports, which is of great strategic significance to the implementation of the national large aircraft project. It is important to change the 12%cr waste rotor forgings into consumable electrodes

an aviation expert told yesterday that the reason why China attaches so much importance to the research of aviation materials is that it is difficult to import them internationally and its efficient thermal insulation performance. "Aviation materials, especially composite materials, can be used in military aircraft production, so it is difficult to introduce them internationally. Therefore, aviation materials can be said to be the technical key that China's large aircraft projects must break through." The aviation expert said, "compared with composite materials, the key technologies of the other two large aircraft engines and airborne equipment can basically be purchased globally."

Zhou Jisheng, former deputy chief designer of ARJ21 project, also told that the development of materials for manufacturing large aircraft, especially composite materials, is the biggest and most difficult challenge for China's large aircraft manufacturing work. "In the past, the materials used for large passenger aircraft in the world were mainly advanced aluminum alloys, supplemented by composite materials; but by the time of Boeing 787, the use of composite materials had made a qualitative leap, which not only increased in number, but also began to be used in the main stress parts of aircraft."

Li Ruiyi, deputy chief engineer of Hafei group, also introduced that composite materials will be used for 30% - 40% of the airframe structure of large aircraft, and composite materials are the dominant industry of Hafei group. It is currently the largest aviation composite material development and production base in China. It has also established a composite material structure design room and established a complete supporting composite material R & D, manufacturing, testing and experimental technology system

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