Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of method for preparing al/cnt composite material

A composite material, pre-alloying technology, applied in chemical instruments and methods, sustainable manufacturing/processing, carbon compounds, etc., can solve the problem of reducing the dispersion effect of multi-walled carbon nanotubes, reducing the dispersion effect of mechanical stirring, affecting the final material properties, etc. The problem is to achieve the effect of low preparation cost, strong designability, high temperature mechanical properties and radiation resistance mechanical properties.

Active Publication Date: 2022-04-05
UNIV OF SCI & TECH BEIJING +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, various segregations inevitably exist in the multi-walled carbon nanotube-reinforced aluminum alloy prepared by the melt method, which affects the properties of the final material.
At the same time, the rise of melt viscosity in the later stage of solidification will inevitably reduce the dispersion effect of mechanical stirring and ultrasonic waves. At this stage, the multi-walled carbon nanotubes have the risk of re-agglomeration, reducing the dispersion effect of multi-walled carbon nanotubes.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of method for preparing al/cnt composite material
  • A kind of method for preparing al/cnt composite material
  • A kind of method for preparing al/cnt composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Example 1: Preparation of 0.1wt.% CNTs-2195 Aluminum Alloy Body

[0061] First wash the multi-walled carbon nanotubes with concentrated sulfuric acid and concentrated nitric acid with a mixed acid with a volume ratio of 3:1 for 30 minutes, then centrifuge and shear at a speed of 10,000 rpm for 5 minutes for later use, and then the treated multi-walled carbon nanotubes The tube, polyacrylic acid and aluminum nitrate were dissolved in an appropriate amount of deionized water at a mass ratio of 1:0.5:0.5, dispersed by ultrasonic waves for 30 minutes to obtain a suspension solution, and then the suspension solution was stirred, heated and evaporated to dryness to obtain a powder precursor. Treat the obtained precursor powder with a current of 4A for 3 minutes. The treatment process is shown in 2, and the surface-modified multi-walled carbon nanotubes are obtained, as shown in image 3 Shown is the SEM image of the surface-modified multi-walled carbon nanotubes. The surface...

Embodiment 2

[0062] Example 2: Preparation of 0.5wt.% CNTs-2195 Aluminum Alloy Body

[0063] First wash the multi-walled carbon nanotubes with concentrated sulfuric acid and concentrated nitric acid with a mixed acid with a volume ratio of 3:1 for 30 minutes, then centrifugally shear and disperse them at a speed of 15,000 rpm for 15 minutes for later use, and then the multi-walled multi-walled carbon nanotubes The tube, polyacrylic acid and yttrium nitrate were dissolved in an appropriate amount of deionized water at a mass ratio of 1:0.5:2, dispersed by ultrasonic waves for 40 minutes to obtain a suspension solution, and then the suspension solution was stirred, heated and evaporated to dryness to obtain a powder precursor. The obtained precursor powder was treated with a current of 8 A for 4 minutes to obtain surface-modified multi-walled carbon nanotubes. The surface-modified multi-walled carbon nanotubes and aluminum powder are mixed at a mass ratio of 1:6, stirred evenly at a super hi...

Embodiment 3

[0064] Example 3: Preparation of 2wt.% CNTs-2195 Aluminum Alloy Body

[0065] First wash the multi-walled carbon nanotubes with concentrated sulfuric acid and concentrated nitric acid with a mixed acid with a volume ratio of 3:1 for 30 minutes, then centrifugally shear and disperse them at a speed of 20,000 rpm for 30 minutes for later use, and then the multi-walled multi-walled carbon nanotubes The tube, polyacrylic acid and aluminum acetylacetonate were dissolved in an appropriate amount of deionized water at a mass ratio of 1:0.5:3, dispersed by ultrasonic waves for 45 minutes to obtain a suspension solution, and then the suspension solution was stirred, heated and evaporated to dryness to obtain a powder precursor. The obtained precursor powder was treated with a current of 12A for 5 minutes to obtain surface-modified multi-walled carbon nanotubes. The surface-modified multi-walled carbon nanotubes and aluminum powder are mixed at a mass ratio of 1:9, stirred evenly at a h...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the research field of preparation of advanced metal materials, and provides a method for preparing an Al / CNT composite material. In the method, an electric current is used to modify the surface of multi-walled carbon nanotubes, and then the modified multi-walled carbon nanotubes and Pure aluminum powder is prepared into a pre-alloyed block, and the pre-alloyed block is added to the induction furnace equipped with 2195 aluminum alloy melt before spray forming, and the method of direct spray forming to obtain Al / CNT composite material after ultrasonic dispersion or mechanical stirring dispersion . The beneficial effects of the present invention are: the method of the present invention utilizes the addition of multi-walled carbon nanotubes in the 2195 aluminum alloy melt for dispersion, reduces the energy required in the dispersion process of multi-walled carbon nanotubes, improves the preparation efficiency and reduces the introduction of impurities, and at the same time Using the rapid cooling of the spray forming process to reduce the agglomeration of multi-walled carbon nanotubes in the later stage of solidification, and finally obtain a 2195 aluminum alloy body with less impurity content, uniform distribution of multi-walled carbon nanotubes, and less or no segregation of elements.

Description

technical field [0001] The invention belongs to the research field of preparation of advanced metal materials, and particularly provides a method for preparing Al / CNT composite materials. Background technique [0002] Aluminum-lithium alloys have performance advantages such as low density, high specific stiffness and specific strength, strong corrosion resistance, and strong low-temperature and high-temperature mechanical properties. They are a class of lightweight alloys with excellent comprehensive properties and great development potential. In particular, adding 1% of metal lithium to aluminum alloy can not only increase the modulus of elasticity by 5% to 6%, but also reduce the density of the alloy by 3%. Driven by the eternal development goal of "weight loss" in the aerospace industry, huge investment has been made in the research and development of aluminum-lithium alloys at home and abroad, making the development of aluminum-lithium alloys very rapid. Among many alum...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C1/05B22F9/04C22C21/16C01B32/168
CPCC22C1/05B22F9/04C22C21/16C01B32/168B22F2009/043C01B2202/06Y02P20/10
Inventor 章林沈晓宇刘烨陈旭秦明礼曲选辉
Owner UNIV OF SCI & TECH BEIJING