A kind of preparation method of quasicrystal reinforced aluminum matrix composite material

Abstract

The invention relates to a preparation method of a quasi-crystal reinforced aluminum-based composite material. In view of the low mechanical property strength and poor toughness of an aluminum-based composite material, quasi-crystal particles are added into the aluminum-based composite material to prepare the quasi-crystal reinforced aluminum-based composite material through smelting and casting.The strength and hardness of the composite material are improved. The preparation method is advanced in process, accurate and detailed in technical parameter, good in product purity and high in product quality, and is an advanced preparation method of the quasi-crystal reinforced aluminum-based composite material.

Description

technical field [0001] The invention relates to a method for preparing a quasi-crystal reinforced aluminum-based composite material, belonging to the field of composite material preparation. Background technique [0002] The diffraction patterns of quasicrystals have 5th, 8th, 10th and 12th rotational symmetry, and have non-crystallographic rotational symmetry and long periodic translation order; quasicrystals have low electrical and thermal conductivity, special optical properties, Low surface energy and friction coefficient, oxidation resistance, biocompatibility and high hardness, but its low temperature brittleness makes it difficult to use as a structural part; in order to take advantage of its excellent performance, quasicrystals can be used as reinforcements, namely , using the second phase reinforcement mechanism; on the one hand, the quasicrystal as a reinforcement can give full play to the excellent performance of the quasicrystal and improve the mechanical propert...

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Problems solved by technology

[0003] The distribution and content of quasicrystals in the matrix determine the overall performance of the composite material. At present, the research on quasicrystal-reinforced aluminum matrix composites mainly adopts the powder metallurgy method, which is expensive and not suitable for mass production. The strength and toughness are poor; in order to make the quasicrystalline particles better compound with the matrix material, electromagnetic stirring is used; on the one hand, electromagnetic stirring can fully mix all the reactants, and the mixing is more uniform, and the material after mixing The temperature will be relatively uniform; on the other hand, electromagnetic stirring can prevent the growth of dendrites, so as to obtain a better as-cast microstructure; due to the difference in the concentration of elements contained in the quasicrystalline particles and the matrix, diffusion will occur, and the composition due to atomic diffusion Changes will destabilize the quasicrystal phase structure; in order to make better use of the excellent properties of the quasicrystal, high-temperature oxidation of the quasicrystal particles is used to form a thin oxide film on the surface of the quasicrystal, thereby reducing the diffusion between the reinforcement and the matrix. This technology is still under scientific research

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