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National University Of Defense Technology Professor Talks About The Future Development Of Composite Materials

Jul 28, 2020

The development of science and technology, the advancement of society, and the rise of composite materials in this industry are inseparable from the country's output of talents. Professor Xiao from my country's National University of Defense Technology put forward his own unique views on the future development of composite materials.

Materials are the cornerstone of the development of human civilization and the foundation of manufacturing. If my country wants to realize the transformation from a big manufacturing country to a strong manufacturing country, it is essential to improve the level of new material technology and industry. Advanced composite materials (ACM) are increasingly being used in aerospace, transportation, machinery, construction and other industries due to the characteristics of designable performance, high specific performance, and material component integration.

Composite material refers to a new type of material that is prepared from two or more raw materials and has a multi-phase component with a reinforcing phase and a matrix phase. Straw-reinforced mud bricks and reinforced concrete belong to early composite materials. Modern composite materials were developed in the late 1940s in response to the lightweight structure of the aviation industry. According to Professor Xiao, China began to develop such new materials systematically in the 1960s. For more than 40 years, China’s advanced composite materials have always been an important area of national development and have received great attention and attention from the party and state leaders. Its research results also promote the development of national science and technology.

"The remarkable feature of the first generation of composite materials is'light and strong'. The typical variety is glass fiber reinforced unsaturated polyester composite material, which is what we commonly call'glass reinforced plastic'." Professor Xiao introduced that this type of lightweight and high-strength material is the most It was first used in aircraft structural parts, and then gradually entered other fields of industry. With the continuous improvement of technical requirements, the second generation of composite materials developed in the late 1960s showed the characteristics of "light but strong and light and rigid". The typical variety is carbon fiber reinforced resin matrix composites. Such lightweight, high-strength and high-rigidity materials are widely used in high-tech fields such as aerospace. In the 1980s, the third generation of composite materials has been developed, which are characterized by "light and strong, light and rigid, and multifunctional". Typical varieties include metal-based and ceramic-based composite materials. In addition to the application fields of the first two types of materials, these materials can also be used in special applications such as high temperature resistance, high thermal conductivity, high heat insulation, and wave absorption. "Now everyone talks about'innovation driven', where does the driving force come from?" Professor Xiao believes that there are many "power sources", among which "the high-end and diversified application requirements contain innovation power". It is precisely because of the "advanced with the times" of the application requirements and the "widespread with the times" of the application fields, the driving force is generated to drive the advanced composite material technology and industry to "advance with the times". Among them, it is very important to continuously strengthen basic research. "If the level of basic research can lead, it must lead, and it must be able to "top the sky"; the results of applied research must be applied and must be "situated." Professor Xiao said frankly that basic research does not have too many boundaries and should not be too quantitative and indexed. To this end, the National University of Defense Technology relies on a complete talent cultivation system and has always maintained a discipline development philosophy that emphasizes basic research. According to Professor Xiao, with the support of various programs such as key projects of the National Natural Science Foundation of China, the school has carried out basic research on composite materials, and solved the problems of composite raw material composition, composite preparation process, and service behavior of composite products. The technical bottleneck of the series foundation, the effect is outstanding.

From "top sky" to "situation", Professor Xiao painted a blueprint for the development of advanced composite materials in the future, but also emphasized that the most fundamental task of universities is to cultivate people. The political quality, physical and mental health, and moral quality of the trainees are very important. He did not hesitate to say frankly: "It is necessary to have such a strength to serve the country, serve the people, and catch up with the Western world. There is no group of people, a group of advanced elements, and they are willing to devote one acre of land to work hard. , It’s impossible.” He also mentioned, “In the innovation