Pressure infiltration technology

Abstract

The invention discloses a pressure infiltration technology. The pressure infiltration technology is applied to a carbon fiber reinforced aluminum matrix composite, firstly, a reinforced preform is prepared, and then a molten aluminum alloy solution is poured into a mold under certain pressure and temperature conditions, so that the carbon fiber reinforced aluminum matrix composite is prepared; the technology comprises steps as follows: heating for glue removal of carbon fibers, alkaline degreasing, cleaning, filtration, placement in the mold for extrusion molding, vacuum infiltration, cooling and molding. The heating temperature for glue removal of the carbon fibers is 400 DEG C, the heating time is 10 min, and a 10% NaOH solution is adopted for alkaline degreasing at the temperature of 40 DEG C. The fiber preheating temperature is 300-400 DEG C for vacuum infiltration, the molten aluminum alloy temperature is 700-800 DEG C, shielding gas is high-purity argon, the pressure is 3-6 MPa, and the infiltration time is 30-45 s. The carbon fiber reinforced aluminum matrix composite prepared with the technology is high in modulus, light in mass and good in rigidity, and the technology has the stable processing quality and is particularly suitable for processing and preparation of small complex parts.

Description

technical field [0001] The invention relates to a pressure impregnation process. Background technique [0002] Composite materials (composites) refer to a material system formed by complex spatial combination of two or more materials with different physical and chemical properties at different structural scales and levels such as micro, meso or macro. It not only retains the main characteristics of the original component materials, but also obtains properties that the original components do not have through the composite effect. Through material design, the properties of each component can complement each other and be related to each other, so as to obtain new superior properties, which is different from general materials. There is an essential difference in the simple mixing of . [0003] According to different standards and requirements, there are many classification methods for composite materials: ① According to different performances, they can be divided into structura...

AI Technical Summary

Problems solved by technology

The disadvantages of metal matrix composites are that the process cost is high, the preparation and processing technology is complicated, and it is not mature enough.

Research work on carbon fiber reinforced copper matrix composites has also been carried out in China. Hefei University of Technology has done a lot of research work on the preparation of short fibers, electrical conductivity, friction and wear, and found that hot pressing is the best way to prepare short carbon fiber reinforced copper matrix composites. effective method, but there is still some difficulty in the control of process parameters