Preparation method of in-situ ternary nanoparticle reinforced aluminum-based composite material

Abstract

The invention provides a preparation method of an in-situ ternary nanoparticle reinforced aluminum-based composite material. According to the method, an in-situ reaction generation technology is adopted, powder containing a generation reinforcing particle forming element is used as a reactant, a low-frequency rotating magnetic field / ultrasonic field control technology is combined, and a nano-particle intermediate alloy is remelted to prepare the aluminum-based composite material. According to the ternary nanoparticle reinforced AA6016-based composite material prepared by the invention, the average particle size is 65 nm, and a comparison unit and biphase nanoparticles have an obvious thinning phenomenon. The room temperature mechanical property test shows that compared with a matrix aluminum alloy, the tensile strength of the ternary nanoparticle reinforced AA6016-based composite material prepared by the invention is improved by 27.46%-33.5%, the elongation rate is increased by 23.56%-30.89%, and the ternary nanoparticle reinforced AA6016-based composite material has great application potential in the fields such as aviation, aerospace, advanced weapons, automotive industry, precision instruments and other civil industries.

Description

technical field [0001] The invention provides a method for preparing an in-situ ternary nanoparticle-reinforced aluminum-based composite material, which belongs to the technical field of aluminum-based composite material preparation. Background technique [0002] In recent years, with the increasingly prominent problems of environmental pollution, energy shortage, and the increasing demand for lightweight automobile manufacturing, high-tech fields such as aerospace, rail transit, and new energy vehicles have huge demand potential for in-situ aluminum matrix composites, and the demand for The requirements for its comprehensive performance are also getting higher and higher. Therefore, further improving the comprehensive mechanical properties and forming processability of in-situ aluminum matrix composites has become an urgent problem to be solved. [0003] In-situ particle-reinforced aluminum-based composites are formed by adding solid powder reaction salts containing reinfo...

AI Technical Summary

Problems solved by technology

However, this type of technology is not perfect at present, mainly in the following aspects: (1) There are few reaction systems, most of which are concentrated in the Al-Ti-x (Al-Ti-O, Al-Ti-B) system, and the reaction of the system Higher temperature not only makes it difficult to control the morphology of the reinforced phase synthesized by reaction, but also seriously deteriorates the molten aluminum.

(2) The size of nanoparticles is small, and the specific surface area effect is very obvious, which makes it easier for particles to agglomerate and is difficult to disperse in aluminum melt

(3) The wettability of particles and matrix is ​​poor, and the yield of binary nanoparticles is low

At present, the nanoparticle-reinforced phase prepared by in-situ reaction technology is mainly concentrated in the unit, but there are few relevant literatures reporting the preparation of multi-component nanoparticle-reinforced aluminum matrix composites by in-situ melt reaction, so it is urgent to develop a new reaction system and method. To solve the problem of multi-component nanoparticle reaction preparation and low particle yield

Images