Method for preparing carbon nanotube enhanced magnesium-based composite material

A technology of carbon nanotubes and composite materials, applied in the field of metallurgy, can solve problems such as difficulty in reaching mass production level, complex weight loss process, and expensive ultrasonic treatment, and achieve easy and accurate control and adjustment, short process flow, and low production cost Effect

Inactive Publication Date: 2013-04-03
NANCHANG UNIV
View PDF6 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the weight loss process is complex and difficult to control, ultrasonic treatment is expensive and it is difficult to reach the level of mass production

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First, mix aluminum powder, zinc powder and carbon nanotubes in a mass ratio of 9:1:1, put them into a ball mill and mill them for 6 hours, then sieve and separate the balls with a 50-mesh stainless steel mesh to obtain a uniform mixture, and then Use aluminum foil to wrap the mixture. According to the amount of the mixture, it can be divided into several times and wrapped. Put the mixture into a mold of a certain size, and use a press to press at room temperature to obtain carbon nanotubes / metal Powder prefabricated blocks. Put the preheated AZ91D magnesium alloy into a crucible made of low carbon steel that has been preheated to dark red (~500°C), and start to introduce CO while melting 2 and SF 6 The gas mixture (volume ratio of CO 2 : SF 6 =99: 1) As a protective gas, when the AZ91D magnesium alloy is completely melted, the melt is refined and degassed to remove slag. After refining, when the melt temperature reached 720°C, a bell jar was used to press the carbo...

Embodiment 2

[0023] First, mix aluminum powder, zinc powder and carbon nanotubes in a mass ratio of 9:1:0.5, put them into a ball mill and mill them for 6 hours, then sieve and separate the balls with a 50-mesh stainless steel mesh to obtain a uniform mixture, and then Use aluminum foil to wrap the mixture. According to the amount of the mixture, it can be divided into several times and wrapped. Put the mixture into a mold of a certain size, and use a press to press at room temperature to obtain carbon nanotubes / metal Powder prefabricated blocks. Put the preheated AZ91D magnesium alloy into a crucible made of low carbon steel that has been preheated to dark red (~500°C), and start to introduce CO while melting 2 and SF 6 The gas mixture (volume ratio of CO 2 : SF 6 =99: 1) As a protective gas, when the AZ91D magnesium alloy is completely melted, the melt is refined and degassed to remove slag. After refining, when the melt temperature reached 720°C, a bell jar was used to press the car...

Embodiment 3

[0025] First, mix aluminum powder, zinc powder and carbon nanotubes in a mass ratio of 9:1:1.5, put them into a ball mill and mill them for 6 hours, then sieve and separate the balls with a 50-mesh stainless steel mesh to obtain a uniform mixture, and then Use aluminum foil to wrap the mixture. According to the amount of the mixture, it can be divided into several times and wrapped. Put the mixture into a mold of a certain size, and use a press to press at room temperature to obtain carbon nanotubes / metal Powder prefabricated blocks. Put the preheated AZ91D magnesium alloy into a crucible made of low carbon steel that has been preheated to dark red (~500°C), and start to introduce CO while melting 2 and SF 6 The gas mixture (volume ratio of CO 2 : SF 6 =99: 1) As a protective gas, when the AZ91D magnesium alloy is completely melted, the melt is refined and degassed to remove slag. After refining, when the melt temperature reached 720°C, a bell jar was used to press the car...

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
elastic modulusaaaaaaaaaa
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention provides a method for preparing a carbon nanotube enhanced magnesium-based composite material comprises the following steps of: mixing carbon nanotubes and metal powder together in the mass ratio of (1:2)-(1:30), putting the mixture in a ball mill for ball milling for 0.5-24 hours, filtering the milled powder through a 40-100-mesh stainless steel sieve, and then covering the mixture with a metal foil and putting the covered mixture in a die for pressing; after completely melting a magnesium base material, refining, degassing and deslagging the melt, and then pressing the carbon nanotube / metal powder precast block into the melt of the magnesium base material by using a bell jar until the percast block is completely melted into the magnesium or magnesium alloy liquid, stirring for 0.5-10 minutes under the conditions of 700-780 DEG C and 100-1500 r / minute, regulating the melt temperature to the casting temperature, and then performing casting to form the billet of the carbon nanotube enhanced magnesium-based composite material, wherein the content of the carbon nanotubes in the carbon nanotube enhanced magnesium-based composite material is 0.1-5wt%. The method provided by the invention is simple in process, convenient in operation and short in flow; the carbon nanotube particles are evenly distributed in the base body; and the method is excellent in performance and low in production cost, thereby being suitable for industrially preparing a high-performance carbon nanotube enhanced magnesium-based composite material.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a preparation method of a magnesium-based composite material. Background technique [0002] In recent years, with the rapid development of high-tech fields such as aerospace, automobile, machinery and electronics industries, the demand for particle-reinforced metal matrix composites is increasing year by year. Magnesium-based composites are highly valued because of their low density and higher specific strength, specific stiffness, wear resistance and high temperature resistance than magnesium and magnesium alloys. Carbon nanotubes have excellent properties, such as multi-walled carbon nanotubes with an elastic modulus of 1TPa, tensile strength of 30GPa, extremely high aspect ratio and unique conductive properties, and are ideal reinforcement materials for the preparation of composite materials. However, carbon nanotubes have a large specific surface area and a very high aspe...

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 Applications(China)
IPC IPC(8): C22C47/06C22C47/08C22C101/10C22C121/00
Inventor 刘勇曾效舒付东明邵爽
Owner NANCHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap