Preparation method of three-dimensional reticular silicon carbide ceramic reinforced aluminum-based composite material

Abstract

The invention discloses a preparation method of a three-dimensional reticular silicon carbide ceramic reinforced aluminum-based composite material. The preparation method comprises the following steps: (1) selecting three-dimensional reticular porous silicon carbide ceramic, and carrying out surface roughening, polishing, cleaning and drying treatment; (2) carrying out evaporation treatment, and wrapping ribs of the three-dimensional reticular porous silicon carbide ceramic by metal Ti plating layers; (3) preparing an aluminum alloy ingot Al-10Mg-12Si-2Ti, and then grinding the aluminum alloyingot Al-10Mg-12Si-2Ti into aluminum alloy powder; (4) filling pores of the three-dimensional reticular porous silicon carbide ceramic with the aluminum alloy powder in a vacuum environment, and thentransferring the three-dimensional reticular porous silicon carbide ceramic into a tubular furnace; and (5) heating to 1300 DEG C in a nitrogen environment, preserving heat for 0.5 hour, immediately converting into an argon environment, continuously heating to 1300 DEG C, preserving heat for 1 hour, stopping heating, and cooling along with the furnace. According to the method, infiltration of thealuminum alloy to the ceramic can be achieved at normal temperature and normal pressure, infiltration efficiency is high, cost is low, and the method is suitable for large-scale industrial production.

Description

Technical field [0001] The present invention belongs to the technical field of composite materials, and more particularly to a three-dimensional mesh silicon carbide ceramic reinforced aluminum matrix composite preparation method. Background technique [0002] Three-dimensional mesh ceramic / metal double (co) continuous phase composite material preparation technology mainly has the following ways: [0003] (1) The Professor Northeastern University Ru Hongqiang Tessia has successfully prepared a composite material such as a three-dimensional network SiC ceramic / 20Cr group, a steel group, a copper group and an aluminum group in a vacuum-air pressure casting method. [0004] (2) The Chinese Academy of Sciences Shenyang Metal Research Institute Zhang Jinsong Professor's Project Group uses the extrusion casting method to prepare a three-dimensional network SiC / Cu group composite material or the like; [0005] (3) Beijing Aviation Materials Research Institute Cuiyan Test Group suc...

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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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