Preparation method for carbon nano tube reinforced aluminum matrix composite material

A carbon nanotube and composite material technology is applied in the field of preparation of carbon nanotube reinforced aluminum matrix composite materials, which can solve the problems of weakening the strengthening effect of the reinforcement, and achieve high powder purity, low process pollution, and complete carbon tube structure. Effect

Active Publication Date: 2017-03-29
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology

Carbon and most metals including Al are difficult to wet spontaneously. Although studies have shown that to a certain extent, interfacial reactions can improve wettability and increase interfacial bonding strength, but the generation of a large number of re

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  • Preparation method for carbon nano tube reinforced aluminum matrix composite material
  • Preparation method for carbon nano tube reinforced aluminum matrix composite material
  • Preparation method for carbon nano tube reinforced aluminum matrix composite material

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Embodiment

[0024] 2009 aluminum alloy powder is used, the composition is 3.0wt.% Cu, 1.5wt.% Mg, Al balance, the average particle size is 30 μm; the nominal diameter of multi-walled carbon nanotubes is 40-60 nm, and the length is 5-15 μm. Put 1kg of mixed powder of aluminum alloy powder and multi-walled carbon nanotubes and 40Kg of grinding balls into the stirring ball mill, and the material of the grinding balls is ZrO 2 , multi-walled carbon nanotubes accounted for 1.0% of the mass of the mixed powder, the diameters of the grinding balls were 3mm, 5mm, and 8mm, and the corresponding mass ratios were 2:1:1. figure 1 A schematic diagram of a stirring ball mill.

[0025] Pass liquid nitrogen into the ball mill tank, and when the balls and the mixed powder are all immersed in the liquid nitrogen, start ball milling with a rotating speed of 180r / min and a ball milling time of 2h. Pay attention to observe the amount of liquid nitrogen during the ball milling process, so that it can always s...

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Abstract

The invention provides a preparation method for a carbon nano tube reinforced aluminum matrix composite material. The preparation method comprises the following steps that firstly, composite powder with carbon nano tubes evenly dispersed is obtained by adopting low-temperature ball milling; and then a composite blank is obtained after the powder is solidified by sleeve installing, air removing and hot isostatic pressing; and further, a bar material, or a sectional material or a forge piece product is formed by normal hot working methods such as squeezing and forging and pressing; and finally, heat treatment is conducted. According to the preparation method, the carbon nano tubes have good dispersity in an aluminum alloy matrix, the damage degree of reinforced bodies of the carbon nano tubes is small, the formed composite material has even microstructures and good interface bonding; and meanwhile, the composite material has high strength and plasticity, and is expected to be applied to the fields, such as aerospace and cars, which have strong needs for light-weight high-strength structural materials.

Description

technical field [0001] The invention provides a method for preparing a carbon nanotube reinforced aluminum-based composite material, which belongs to the technical field of metal-based composite materials. Background technique [0002] Aluminum matrix composites have high specific strength, specific modulus, good electrical and thermal conductivity, and high temperature performance. They have been applied in aerospace, automotive, and microelectronics fields and have attracted more and more attention. Carbon nanotubes have a unique structure and excellent physical and chemical properties (the Young's modulus can reach 1-1.8TPa, the tensile strength can reach 150GPa, and the density can reach 1.2-1.8g / cm 3 , the thermal expansion coefficient is almost zero, and it also has good toughness and plastic deformation ability), its comprehensive performance is far superior to the existing particles or fibers, and it is an ideal reinforcement for composite materials. However, carbon...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C21/00C22C26/00
CPCC22C1/05C22C21/00C22C26/00C22C2026/002
Inventor 何晓磊何天兵唐鹏钧李沛勇陈军洲
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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