On July 31, a high-performance carbon fiber sample was newly prepared at the School of Materials Science and Engineering of Hunan University. â– Way of becoming a "material" "Drilling deep" docking high-end applications Aluminum alloys are common in everyday life. Is it new material? Professor Chen Jianghua may not think so: “Aluminum alloys are still an indispensable high-end material, especially in the lightweight applications of modern transportation and defense equipment. A beam on the wing of the Airbus A380 is the largest aluminum in the world. Alloy forgings, more than 6 meters long, weighs 3.9 tons." Chen Jianghua is a distinguished professor of Changjiang Scholarship of the Ministry of Education, a special expert of the National (Thousand Talents Program), and dean of the School of Materials Science and Engineering of Hunan University. He used advanced high-resolution electron microscopy technology to reveal the microcosmic laws of the strength variation of aluminum alloy sheet for passenger cars in the world and observed for the first time the early hardening of the alloy elements in the precipitation phase (GP zone) of 6XXX series aluminum alloys. The law of arrangement reveals the driving force for the evolution of atomic arrangements in the GP region. Over the years, his laboratory has conducted in-depth research on the basic scientific issues of various types of high-performance aluminum alloys by undertaking research projects of the National 973 Project, the National Development Fund Committee, and the National Defense Industry and Technology Bureau. On July 29, Chen Jianghua said in an interview with reporters: “When we study the microstructure and atomic arrangement of permeating aluminum alloys, we can fundamentally diagnose whether the materials are healthy and reliable, and give solutions to their physical problems.†From 2009 onwards, he organized a task force of Hunan University to carry out in-depth cooperation with Qingdao Sifang Locomotive & Rolling Stock Co., Ltd., which has created many of China's high-speed trains as the “firstâ€. The research funding commissioned by the company alone reached more than 8 million yuan. The "12th Five-Year Development Plan for New Materials Industry" issued by the Ministry of Industry and Information Technology has proposed that high-performance aluminum alloys, magnesium alloys, and titanium alloys should be developed in the direction of light weight, high strength, large size, high temperature resistance, corrosion resistance, and fatigue resistance. Focus on meeting the needs of large aircraft, high-speed rail and other transportation equipment. "The current docking application with high-speed rail has matured, but with the automotive, aerospace and other fields, but also requires the relevant industries and departments to understand, trust and support." Chen Jianghua said. Keeping pace with the times "Nuggets" traditional industries On July 20th this year, Xiaohan Ning, professor of Hunan University and director of the Ceramic Research Institute of Hunan University, signed a framework agreement for investment in high-performance ceramic membrane projects with Liling City. Xiao Hanning owns six patents for this technology. He believes that the ceramics industry must open up a new blue ocean, and “cross-border†environmental protection is a feasible way of thinking. It is understood that the "diameter" of high-performance ceramic membranes is only nano-scale, micron-level, compared with the traditional filter materials, in the industrial waste gas purification, drinking water filtration and other aspects have absolute advantages. At present, only a few countries, such as Japan and Singapore, have mastered this technology and it is estimated that there will be a huge market of the order of 100 billion yuan in China. It is precisely because of the huge market potential for the application of new ceramics in the field of industrial technology. The ceramic industry, which seems to be “almost nearâ€, has begun to glow with new vitality. For example, Apple’s latest generation of watches has used ceramics as a case material. According to the data from the Provincial Economic and Information Commission, the total output value of industrial ceramics in our province was approximately RMB 32 billion in 2014, and three major industrial concentration areas have been formed in Changsha Economic Development Zone, Liling City and Xinhua Lengshuijiang District. "China's UHV and high-speed rail are in a stage of rapid development, and the market demand for high-strength, high-reliability porcelain insulation materials will be further expanded. Keeping pace with the times, this is also the focus of our efforts." Xiao Hanning told reporters. Not only ceramics but graphite, a traditional non-metallic mineral, is becoming an important part of emerging industries. Professor Liu Hongbo, a professor and doctoral supervisor at Hunan University, told reporters that advanced carbon graphite materials represented by carbon fiber, lithium ion battery anode materials, isotropic graphite, and high thermal conductivity graphite are hot topics at home and abroad. The newly developed graphene is even more Widely optimistic. Hunan University is also one of the few universities in China that has a carbon specialty. Liu Hongbo introduced that the school’s Advanced Carbon Materials Research Center is working on the research and development of high-performance carbon fiber materials and composite materials, and will carry out applied research in the field of lightweight materials for new energy vehicles. Accelerate the transformation of results The ESI (Basic Scientific Indicators Data) ranking of the Materials Science of Hunan University has already entered the top 1% of the world. To promote the integration of production, education and research, further integrate resources, and promote scientific and technological achievements to speed up industrialization and scale, there is still much room. “Hunan is a non-ferrous metal country, but it has left a large amount of metal solid waste for a long time. By injecting scientific and technological strength, it can turn waste into treasure.†Xiao Hanning, for example, used to comprehensively use blast furnace slag to make cement, and now technological innovation accelerates. Can be used to produce glass-ceramics with dual characteristics of the glass-ceramics, to achieve greater value-added. At present, relevant cooperation with Shanghai Baosteel has been carried out. The first pilot production line (that is, the test before the product is officially put into production) is expected to be put into operation in the second half of the year. In Liu Hongbo's view, natural microcrystalline graphite is a high-quality resource in Hunan, and its reserves, production and quality are among the world's leading. Hunan University has conducted a large number of preliminary studies on deep processing technology, and the prospects for low-cost purification and high-end application technology development are promising. Not only that, Hunan's automobile industry has risen rapidly in recent years. The use of aluminum alloy for auto bodywork has broad prospects for development. In general, the advantages of the all-aluminum body are energy saving and emission reduction, which can reduce the weight of the entire vehicle by more than 10%. "At present, China's mass-produced automobiles, including joint venture brands, have not yet used an all-aluminum body. However, a variety of imported models have used all-aluminum bodies. This has already become a major trend. Our universities have obvious scientific research advantages. Can we not help Hunan Automotive in this area?" Chen Jianghua said that in the past more attention was paid to the cooperation with material manufacturers. In the future, the upstream equipment industry should be strengthened to enable the development and application of high-quality new materials to become "2025 Made in China." "The core competitiveness. â– Making "material" reflections For new materials, you need to know why New materials are the foundation and precursor of advanced manufacturing and high-tech industries. Every update of materials will cause disruptive changes to the original manufacturing system, including equipment, technology, and standards. This is also what we often say: "Generation of materials to achieve a generation of equipment." I always thought that research on new materials cannot rely on "hit luck." Simply relying on the study of a large amount of raw materials, discovered the excellent performance of a certain material accidentally, and then summed up the scientific research results and completed the “crossing†of the subject. This is not feasible. We cannot rely on simply mimicking foreign material products and material processes. We only know the final state of materials and related processes, and do not know how to achieve meticulous engineering. Because the results of such studies cannot be applied in batches, they cannot stand the test of time. When our new material industry wants to break through the bottleneck and move up the steps, it must truly understand the nature and laws of the material and know what to expect. Like a doctor, if a patient has a cold, he or she must be diagnosed with tonsillitis or viral flu and find the right medicine for the disease. - Chen Jianghua, Dean of College of Materials Science and Engineering, Hunan University â– Use "material" to drip Aluminum alloy, ceramics, graphite: New material application "useful" In addition to aluminum alloy doors and windows, aluminum alloy car wheels and other commonplace items, the smallest and most windy Tesla electric vehicle is an all-aluminum body. Changsha has already started selling Tesla's dealers, starting at over RMB 700,000. Not only is it a cool appearance, Tesla with its advanced electric power can achieve instant acceleration and can reach 100 kilometers per hour in just 5.6 seconds. Ceramics are everyday household items, but what you may not have noticed is that there are also ceramics in the faucet, and it is very likely that it is made in Hunan. In the Xinhua and Loushui River areas of Loudi City, more than 230 special ceramics enterprises were gathered, among which the series of water valve porcelain pieces already accounted for over 80% of the national market. Besides graphite, graphite rods are the most common dry cells. And with the advancement of science and technology, graphene, a new material derived from graphene, may fully enter your life. In simple terms, after peeling a graphite sheet into a single layer, a monolayer of only one carbon atom thick is graphene. Graphene is also rare in the world, the thinnest, most rigid, nano-materials with the best electrical conductivity at room temperature and strong flexibility. Two scientists who studied and discovered graphene at the University of Manchester, UK, also won the 2010 Nobel Prize in physics. Graphene with strong characteristics is expected to be widely used in touch display, smart wear, clean energy, aerospace war industry and other fields. In March of this year, the world’s first mass-produced graphene phone has been released in Chongqing, with higher touch performance, longer standby time, and better thermal conductivity. (Reporter Chen Hao)
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