Multiphase nano ceramic particle reinforced Al-based composite material and laser 3D printing forming method thereof

Abstract

The invention discloses a multiphase nano ceramic particle reinforced Al-based composite material and a laser 3D printing forming method thereof. AlSiMg powder with a purity of 99.9% and above and a particle size of 15-30 mu m is selected as a composite material base of the Al-based composite material; a powder composition with a purity of 99.9% or above and a particle size of 10-100 mu m is selected as a reinforced phase of the Al-based composite material, and the powder composition comprises Al2O3, SiO2, TiN and TiC, ZnO and Y2O3; after the two kinds of powder are mixed, the obtained mixture is sequentially subjected to high-temperature calcining synthesis, ball-milling and 3D printing forming, so that a required 3D block can be processed. The Al-based composite material obtained according to the invention has uniformly refined microscopic structures and excellent mechanical properties, and in comparison with the performance levels of traditional casting or powder metallurgy products of corresponding materials, the comprehensive mechanical properties of the Al-based composite material are increased by 25% or above.

Description

technical field

[0001] The invention relates to a multiphase nano-ceramic particle-reinforced Al-based composite material and a laser 3D printing forming method thereof; it belongs to the technical field of laser 3D printing forming metal-based composite materials. Background technique

[0002] With the continuous advancement of science and technology, higher requirements are put forward for the performance of materials. It is expected to have good comprehensive properties, such as low density, high strength, high stiffness, high toughness, high wear resistance and good fatigue resistance, etc. , and it is expected to serve in extreme environmental conditions such as high temperature, high pressure, high vacuum, strong corrosion and radiation. Traditional single materials have been difficult to meet the above requirements. In recent years, particle-reinforced aluminum matrix composites have attracted widespread attention. The combination of ceramic particles and aluminum al...