Transportation is always one of the important civil fields of Dongguan metal composite materials. In view of the related factors such as cost and industrial application, continuous fiber reinforced Dongguan metal composite and high cost discontinuous reinforced Dongguan metal composite are excluded from this field, and the possibility of large-scale application of cheap particles and short fiber reinforced Dongguan metal composites is still possible.
The research of Dongguan metal composite materials in automobile industry started earlier. In 1980s, the Japanese Toyota Corporation had used aluminum silicate fiber to strengthen the Dongguan metal composite, and successfully made the automotive engine piston ring and automobile connecting rod and other auto parts. Duralean company in the United States developed a brake disc made of SiC particles reinforced Dongguan metal composite to make the automobile brake disc, which has reduced its quality by 40% - 60%, and improved the wear resistance, the noise is obviously reduced, and the friction heat dissipated quickly. At the same time, the company also made the automobile engine piston and tooth with the SiC particles reinforced by the Dongguan metal compound material. Wheel box and other auto parts. This kind of piston has higher wear resistance, high temperature resistance and bite resistance than aluminum alloy piston, while the coefficient of thermal expansion is smaller and the thermal conductivity is better. The automobile gearbox made of SiCp/Al composite material has obvious improvement in strength and wear resistance compared with the aluminum alloy gearbox. Aluminum alloy composites can also be used to make brake system components such as brake rotors, brake pistons, brake pads and calipers, and can also be used to make automobile parts such as motor drive shaft and rocker arm. Shanghai Jiao Tong University and Academy of arms science and other units have also done a lot of practical work for the application of metal composite materials in Dongguan.
Dongguan metal composite materials, especially the SiC reinforced Dongguan metal composite, have the advantages of small thermal expansion coefficient, low density and good thermal conductivity, which are suitable for the manufacture of electronic devices, such as lining materials and heat dissipation devices. The thermal expansion coefficient of the SiC particle reinforced Dongguan metal composite can be matched completely with the thermal expansion of the electronic device material, and the conductivity and thermal conductivity are also very good. In the field of Applied Research on precision instruments and optical instruments, Dongguan metal composite materials are used for manufacturing telescopic brackets and accessory mirrors. In addition, Dongguan metal composite can also make precision parts, rotating scanning mirrors, infrared observation mirrors, laser mirrors, laser gyroscopes, mirrors, mirror base and optical instrument bracket, and many other precision instruments and optical instruments.
It is applied in the field of electronic packaging. Since 1990s, some companies in developed countries have vigorously developed high content SiCp/Al composites for electronic packaging. The development of metal matrix composites with high thermal conductivity and low thermal expansion for electronic packaging is one of the research trends of new materials. The United States has developed SiCp/Al, Sip/Al, C/Al and other high-performance electronic packaging composite materials, and has become the key to solve the problem of rapid heat transfer and heat dissipation of electronic devices. The electronic packaging composite material developed is Dongguan metal composite with SiCp content of 60% - 75%.