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Carbon nano tube reinforced aluminum alloy composite material prepared through squeeze casting method

A technology of carbon nanotubes and squeeze casting, which is applied in the field of preparation of carbon nanotube-reinforced metal matrix composites, can solve problems such as uneven distribution of carbon nanotubes, poor bonding of carbon nanotubes and metal matrix interfaces, and achieve crystal grain Small size, low porosity, and the effect of eliminating oxide film

Inactive Publication Date: 2010-06-23
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem that the carbon nanotubes in the carbon nanotube reinforced aluminum alloy composite material prepared by the existing method are unevenly distributed, and the interface between the carbon nanotube and the metal matrix is ​​poorly bonded, and provides a method for preparing carbon nanotubes by a squeeze casting method. Nanotube Reinforced Aluminum Alloy Composites

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  • Carbon nano tube reinforced aluminum alloy composite material prepared through squeeze casting method
  • Carbon nano tube reinforced aluminum alloy composite material prepared through squeeze casting method
  • Carbon nano tube reinforced aluminum alloy composite material prepared through squeeze casting method

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specific Embodiment approach 1

[0013] Specific embodiment 1: In this embodiment, the extrusion casting method is used to prepare carbon nanotube-reinforced aluminum alloy composite materials according to the following steps:

[0014] 1. Carbon nanotubes and nitric acid with a mass concentration of 65% to 69% are mixed according to a weight ratio of 0.8 to 1.2:100, refluxed at 100 to 120°C for 5 to 10 hours, and then filtered through a microporous filter with a pore size of 0.45 microns The membrane is subjected to negative pressure filtration, and distilled water is passed through at the same time until the pH value of the filtered solution is 6.0-7.0, and then the carbon nanotubes on the microporous filter membrane are washed down with distilled water to obtain an aqueous solution of carbon nanotubes, and then the aqueous solution of carbon nanotubes is added to the solution. Adding a sodium dodecyl sulfonate solution with a concentration of 18 to 22 mg / mL to obtain a mixed solution, wherein the weight rati...

specific Embodiment approach 2

[0030] Embodiment 2: This embodiment is different from Embodiment 1 in that: in step 1, carbon nanotubes and nitric acid with a mass concentration of 67% are mixed in a weight ratio of 1:100. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0031] Specific embodiment 3: This embodiment differs from specific embodiments 1 to 2 in that: in step 1, reflux at 110° C. for 8 hours. Other steps and parameters are the same as those in Embodiments 1 to 2.

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Abstract

The invention discloses a carbon nano tube reinforced aluminum alloy composite material prepared through squeeze casting method, which relates to a preparation method of carbon nano tube reinforced metal composite material. The invention solves the problem that the distribution of the carbon nano tube in the carbon nano tube reinforced aluminum alloy composite material obtained through the existing preparation method is not even, and the interfacial associativity of the carbon nano tube and the metal base body is poor. The method is as follows: 1, the mixed solution is prepared; 2, the mixed solution is processed in ultrasonic way; 3, the step 2 is repeated; 4, the dried precast block is prepared; 5, the sintered precast block is prepared; 6, melting aluminum alloy is infiltrated to holes of the sintered precast block under the pressure role, and is solidified under the pressure role to obtain the carbon nano tube reinforced aluminum alloy composite material. The carbon nano tubes in the carbon nano tube reinforced aluminum alloy composite material obtained in the invention are evenly distributed, and the interfacial associativity is good.

Description

technical field [0001] The invention relates to a preparation method of a carbon nanotube reinforced metal matrix composite material. Background technique [0002] According to the combination of nano-reinforcement and matrix metal in the composite process, the preparation methods of carbon nanotube-reinforced aluminum alloy composite materials include stirring casting method, powder metallurgy, high-energy ball milling, etc. Among them, the stirring casting method is to combine liquid aluminum alloy with carbon nano The pipe powder is stirred and mixed, and then the whole mixture is solidified. This method has a simple manufacturing process and low production cost, but this method requires that the particle diameter must be greater than 10 microns, and the volume must be less than 25%, and the particles are prone to specific gravity in the melt Segregation, leading to the formation of dendrite segregation during solidification, resulting in uneven distribution of particles....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/12C22C49/06C22C49/14C22C101/10
Inventor 张学习耿林王德尊
Owner HARBIN INST OF TECH
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