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

A technology of reticulated silicon carbide and reinforced aluminum base, applied in metal material coating process, vacuum evaporation plating, coating, etc., can solve the problems of increased material manufacturing cost, low production efficiency, low production efficiency, etc., to achieve The effect of interfacial reaction control

Active Publication Date: 2021-03-30
GUANGZHOU CITY CONSTR COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The three-dimensional mesh silicon carbide ceramic reinforced aluminum matrix composite material provided in this embodiment includes the following steps:

[0053] (1): Surface of the three-dimensional mesh porous silicon carbide ceramic (30 ppi, commercially available) surface is carried out (mixed acids used by acid dip "is a mixed acid solution of diluted concentrated nitric acid and concentrated hydrofluoric acid. Among them, the volume ratio of concentrated nitric acid and concentrated hydrofluoric acid is 5: 1; the ultrasonic treatment time is 1 to 20 minutes, and the mixed acid is a mixed acid solution having a diluted volume concentration of 35 to 40%, a mixed acid solution of concentrated hydrofluoric acid. The surface is roughened, then polishing the ceramic corner (electronic grinding wheel grinding treatment by the three00 # electronic grinding wheel side faces the sample, no spark is standard, the surface is flat; then use 200 # sandpaper light Grinding, 200 # ...

Embodiment 2

[0065] Unlike Example 1, the three-dimensional mesh porous silicon carbide ceramic is prepared in step (1), and the specific steps are as follows:

[0066] Including two centrifugal trap slurry SiC slurry molding and secondary pilot sintering techniques, the first centrifugal flue is a pretreatment of organic foam, immersed in the flask and binder designed by formulation. In the slurry, the slurry is performed, and the slurry is fully wetted and filling the foam; then centrifuged at the centrifuge to remove excess slurry, prepared uniformly coating, no porous body without blocking holes; Room temperature drying; the second centrifugal trap is to dry the ceramic slurry in the ceramic slurry again, and simultaneously impregnate the slurry into the foam, fully impregnated; then, remove extra Slurry; prepared a porous body for uniform structure; Finally after the elimination, high temperature sintering, then a piping, strengthen supplementary part of the hole after sintering, to ensur...

Embodiment 3

[0072] Different from the examples, three-dimensional mesh porous silicon carbide ceramic in step (1) is 40 ppi.

[0073] Step (1) coarse the laser etching treatment.

[0074] The particle diameter of the aluminum alloy powder in step (3) is 0.5 mm.

[0075] Step (4) The amount of the aluminum alloy powder is 75% of the total amount of all three-dimensional mesh porous ceramic holes.

[0076] In step (5), in a nitrogen environment, heated to 1200 ° C, and then turned to an argon environment, then transferred to a argon environment, and then heated after 1 h, stop heating, and cooled to the room. The three-dimensional mesh silicon carbide ceramic reinforced aluminum matrix composite is obtained.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D23/06C22C1/03C22C21/02C22F1/043C23C14/02C23C14/18C23C14/24
CPCB22D23/06C23C14/24C23C14/18C23C14/028C23C14/021C22C1/026C22C1/03C22C21/02C22F1/043
Inventor 彭伟李海林龙轩李秋力王锦红林勇李有兵
Owner GUANGZHOU CITY CONSTR COLLEGE
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