According to different reinforcement systems, alloy aluminum plate composite materials are divided into fiber-reinforced and equiaxed grains with particle diameters between 05100m) reinforced alloy aluminum composite materials. Fiber-reinforced alloy aluminum composite materials include continuous fiber (diameter between 3~140qm, aspect ratio greater than 1000) reinforced, short fiber or whisker (diameter between 01~20gm, aspect ratio around 50) reinforced alloy aluminum composite materials.
The systems used to strengthen continuous fiber-reinforced alloy aluminum composite materials mainly include Ming fiber, alumina fiber, silicon carbide fiber, carbon fiber and other alloy aluminum composite materials. The properties and uses of each alloy aluminum composite material are shown in Table 1. From Table 1, it can be seen that continuously reinforced alloy aluminum Composite materials have excellent properties and have shown great application potential as high-strength, heat-resistant materials in aerospace, military and other fields.
Whisker-reinforced alloy aluminum plate composite materials have high specific strength, specific modulus, good thermal stability, fatigue resistance, wear resistance and other excellent properties. They have developed rapidly and become an important branch of alloy aluminum composite materials. Past research focused on using Sic and SiN as reinforcing phases. In the 1990s, researchers first studied aluminum borate whisker-reinforced alloy aluminum composites. Subsequently, the my country Institute of Metal Research also studied and implemented aluminum borate whiskers. Developed large-scale production projects. Recently, people have successfully prepared a reinforced outer wall annular groove diesel engine piston using the lower-cost potassium titanate whisker-reinforced aluminum alloy studied in recent years.
The reinforced systems of particle-reinforced alloy aluminum composite materials mainly include SiC, TiC, A12O3 and graphite particles, which solves the problem of expensive preparation cost of fiber-reinforced alloy aluminum composite materials. Moreover, the composite material is isotropic, which solves the problem in the preparation process. There are many shortcomings that affect the performance of the material, such as fiber damage, uneven microstructure, fiber-to-fiber contact, and excessive reaction zones. Particle-reinforced alloy aluminum plate composite materials can be widely used in aerospace, military, automobiles, electronics, sporting goods, etc.
