A kind of preparation method of three-dimensional network silicon carbide ceramic reinforced aluminum matrix composite material

Abstract

The invention discloses a method for preparing a three-dimensional networked silicon carbide ceramic reinforced aluminum matrix composite material, comprising the following steps: (1) selecting three-dimensional networked porous silicon carbide ceramics, and performing surface roughening, grinding, cleaning and drying treatment; (2) ) carry out evaporation process, wrap metal Ti coating on the rib of three-dimensional network porous silicon carbide ceramics; (3) prepare aluminum alloy ingot Al-10Mg-12Si-2Ti, then grind into aluminum alloy powder; (4) in vacuum Under the environment, the aluminum alloy powder is filled in the pores of the three-dimensional network porous silicon carbide ceramics, and then transferred to the tube furnace; (5) in the nitrogen environment, heated to 1300 ℃, and kept for 0.5h, then turned into Under the argon atmosphere, continue to heat up to 1300 ℃, after holding for 1 h, stop heating, and cool with the furnace. The method can realize the infiltration of aluminum alloy to ceramics under normal temperature and pressure, has high infiltration efficiency and low cost, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of a three-dimensional network silicon carbide ceramic reinforced aluminum matrix composite material. Background technique [0002] At present, the preparation technology of three-dimensional network ceramic / metal double (co) continuous phase composite materials mainly includes the following methods: [0003] (1) The research group of Professor Ru Hongqiang from Northeastern University successfully prepared three-dimensional network SiC ceramic / 20Cr-based, steel-based, copper-based and aluminum-based composite materials with different metal matrices by vacuum-pressure casting method; [0004] (2) The research group of Professor Zhang Jinsong of Shenyang Institute of Metal Research, Chinese Academy of Sciences has prepared three-dimensional network SiC / Cu matrix composite materials by squeeze casting method, etc.; [0005] (3) Cui Yan'...

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Problems solved by technology

[0007] The vacuum-air pressure casting method requires sophisticated vacuuming and pressure-holding equipment, which limits the shape and size of the material. At the same time, it will also lead to an increase in the manufacturing cost of the material and lower production efficiency;

[0008] Squeeze casting often needs to be carried out under pressure or external vacuum, which will lead to more complicated composite process, higher production cost and lower production efficiency;

[0009] Although the pressureless infiltration is completed under normal pressure, the infiltration driving force needs to be generated under the protective atmosphere of nitrogen gas. For aluminum alloys, if the infiltration process is kept under nitrogen atmosphere for a long time, the composite material will be damaged. Severe interfacial reactions occur at the interface, resulting in insufficient densification of the material and prone to hydrolysis during processing

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