Bottleneck Of Composite Materials For China'S New Fighters: Backward Carbon Fiber Technology

It can be said that this condenses the wisdom and sweat of many experts and scholars of composite materials, and also shows the continuous progress of China's composite materials industry in the aviation field.

Technology integration capabilities continue to improve.

If the satellite's weight loss is calculated, if the satellite's self weight can be reduced, then the satellite may take more than one camera or telescope, and it can also accomplish more missions.

Kuang Naihang, senior engineer of Harbin FRP Research Institute, said.

Information shows that

According to the introduction, the important supporting part of Chang'e two directional antenna, the directional antenna deployment arm, was developed by the Harbin FRP Research Institute, made of carbon composite material. The total weight is only 500 grams, which is nearly 300 grams less than that of the aluminum alloy material, but the bearing capacity is not inferior to the aluminum alloy material component.

In fact, in the field of aerospace, in the field of civil and military aviation, China's CFRP industrial enterprises, based on the comprehensive localization of raw materials, technology and equipment, have greatly enhanced the capability of independent innovation and technology integration in the field of carbon fiber in China.

The intellectual property system, which fully realizes the localization of military carbon fiber, has important strategic significance to break the monopoly of foreign high-performance carbon fibers and to China's technical blockade. Harbin Tian Shun Chemical Technology Development Co., Ltd. is a typical high-tech enterprise, which has conquered the key technologies of high-performance carbon fiber materials in a long time. The pilot products have reached the advanced level of similar products in the world, and have a very wide market space and application value; and the Jiangxi provincial defense science and Industry Office also announced that the newly developed domestic carbon fiber composite materials developed by Hongdu Aviation Industry Corp recently realized trial production of the first gear parts, and will soon equip the Falcon 06 high education machine, which will greatly save the manufacturing cost of Falcon composites. Henan coal chemical industry group has PAN based T300 high-performance carbon fiber integrity.

At present, the domestic carbon fiber composite materials have been extended to the large parts such as hood and rudder, which are also components to be installed on Falcon 06.

High end market still needs breakthrough

Although domestic carbon fiber composites have made great progress in recent years, it is still hard for the industry to work hard to catch up with the world's advanced level.

"China urgently needs to accelerate the development of carbon fiber composite application design and technology solutions, so that high-end carbon fiber will be on scale, performance and cost reduction."

Du Shanyi, academician of the Chinese Academy of engineering, appealed to the 2010 International Forum on materials science and corrosion protection technology.

Du Shanyi, director of the China composite materials society and member of the Advisory Group of Commercial Aircraft Corporation of China experts, suggested that we should concentrate on the organization of science and technology advantage to tackle the problem of T800 grade carbon fiber, rationally deploy the domestic layout of high-end carbon fiber raw materials, prevent the low-level carbon fiber factories from rushing headlong into the herd, encourage the design innovation of composite materials, and achieve reasonable and efficient design. In the aspect of component manufacturing, we should properly purchase advanced equipment abroad, tackle key equipment localization, and cooperate with downstream units to actively develop new technologies and new applications.

An industry expert told reporters that at present, the world's carbon fiber manufacturers in Japan, Dongli, Toho and MITSUBISHI 3 companies, representing the most advanced level in the world.

The quality, technology and production scale of China's carbon fiber are quite different from that of other countries. High performance carbon fiber technology is monopolized and blocked by western countries.

Despite years of research and trial production, China has yet to master the core technology of high performance carbon fibers.

From technology research to industrialization, it is more difficult. Therefore, it is a long process to realize the localization of carbon fiber.

According to Du Shanyi analysis, the application of composite materials in aviation field in China has a certain foundation and has the advantage of raw materials.

In terms of resin and fiber in the two main raw materials and resins of resin matrix composites, there is little difference between China and foreign countries, and there are still 4 difficult problems in the research and development of carbon fiber.

First, the high-end carbon fiber industry is lagging behind.

The scale of domestic carbon fiber is up to 10000 tons, and its output is thousands of tons, but it can only be used in the aircraft non bearing parts and secondary bearing parts. The T800 class carbon fiber needed for the most critical load-bearing parts of the aircraft still stays at the level of tens of kilograms in the laboratory. Large aircraft applications still need to rely on imports.

Compared with foreign countries, the application technology and solutions of carbon fiber in China are quite different. For example, the reasonable design load of carbon fiber is backward, which can not reflect the characteristics of carbon fiber.

Second, the integrated forming technology of CFRP parts is relatively backward, and it is difficult to manufacture large size components.

Third, China's automation technology such as automatic wire laying technology is even more backward.

Fourth, the price of domestic high-performance carbon fiber is too high due to equipment import and low production efficiency.

He stressed that domestic chemical enterprises should take the supporting large aircraft as a breakthrough to solve these 4 problems together.

Du Shanyi told reporters: "large aircraft emphasize safety, economy, comfort and environmental protection, which determines the urgency and inevitability of the demand for composite materials.

Composite materials technology has jumped to become one of the 3 key technologies of large aircraft projects.

Du Shanyi believes that the significance of composite materials is not only reflected in the large aircraft project, but also in the aviation field through the application of composite materials to promote the comprehensive improvement of its application level in automobile and other fields.