Method for preparing carbon nanotube and aluminum borate whisker hybrid reinforced aluminum-matrix composite material

Abstract

The invention relates to a method for preparing a carbon nanotube and aluminum borate whisker hybrid reinforced aluminum-matrix composite material, which relates to a method for preparing an aluminum-matrix composite material which is simultaneously reinforced by microfibers and nanofibers. The method solves the problem that the aluminum-matrix composite material prepared by the conventional method for preparing aluminum-matrix composite materials has poor performance, low interface bonding and difficult uniform distribution of two wild phases of carbon nanotubes and whiskers. The method comprises the following steps of: 1, mixing raw materials by a wet process; 2, preparing a prefabricated block; 3, drying the prefabricated block; 4, sintering the prefabricated block; and 5, casting molten aluminum alloy into a mould provided with the prefabricated block and applying pressure on the mould to obtain the carbon nanotube and aluminum borate whisker hybrid reinforced aluminum-matrix composite material. In the method, the two wide phases of the carbon nanotubes and the whiskers are uniformly distributed, and the carbon nanotube and aluminum borate whisker hybrid reinforced aluminum-matrix composite material prepared by the method has high performance and high interface bonding.

Description

technical field [0001] The invention relates to a preparation method of a micron and nanometer fiber hybrid reinforced aluminum matrix composite material. Background technique [0002] Due to the different properties of various reinforcing materials, hybrid composite materials complement each other, especially due to the hybrid effect, which will obviously improve or improve some properties of the original single reinforcing material, and at the same time greatly reduce the raw material cost of composite materials. Aluminum matrix composites are the most concerned type of materials among metal matrix composites. There are many preparation methods for hybrid aluminum matrix composites, including powder metallurgy, in-situ reaction composite method, squeeze casting method, low pressure infiltration method, stirring method, etc. It has been reported that hybrid reinforced aluminum matrix composites are superior to single reinforced composites in room temperature mechanical prop...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of poor performance, poor interfacial bonding and difficulty in uniform distribution of two reinforcement phases of carbon nanotubes and whiskers, the present invention provides a Preparation method of carbon nanotube and aluminum borate whisker hybrid reinforced aluminum matrix composite

[0005] The present invention adopts nickel-plated carbon nanotubes and aluminum borate whiskers to prepare the two evenly distributed, obtains a prefabricated block with good compression resistance, and solves the problems that the carbon nanotubes themselves are difficult to disperse and the carbon nanotubes and whiskers are uniformly mixed; The invention adopts the liquid phase method to synthesize the composite material. During the composite process, the uniform distribution state of the two reinforcing phases in the prefabricated block is preserved, and at the same time, it solves the problem of poor interface bonding caused by the traditional solid phase method and the generation of brittle phase Al by interface reaction. 4 C 3 to prepare aluminum matrix composites with superior performance

Images