Al2Ca particle and carbon nano tube hybrid reinforced ultra-light magnesium-lithium-based composite material and preparation method

A technology of carbon nanotubes and composite materials, applied in metal material coating technology, liquid chemical plating, coating, etc., can solve problems such as low strength of magnesium-lithium binary alloys, poor stability of alloy structure and performance, and overaging , to achieve excellent lightweight advantages, improve the bonding situation, and the effect of high bonding strength

Active Publication Date: 2019-02-12
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The strength of the magnesium-lithium binary alloy is very low, and it has almost no engineering application value
The strengthening effect of Al, Zn, and Cd in magnesium-lithium alloy is better, but the structure and performance stability of the alloy are poor, and overaging phenomenon is easy to occur at room temperature or slightly higher than room temperature
In the study of magnesium-lithium-based composite materials, it was found that when a single type and single-scale reinforcement phase is used, the addition amount and strengthening effect of the reinforcement phase are limited to a certain extent.

Method used

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  • Al2Ca particle and carbon nano tube hybrid reinforced ultra-light magnesium-lithium-based composite material and preparation method

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Effect test

Embodiment 1

[0026] a kind of Al 2 Ca particle and carbon nanotube hybrid reinforced ultra-light magnesium-lithium matrix composite material, comprising the following components in weight percent: 5wt% micron-scale Al 2 Ca particles, 1 wt% submicron scale Al 2 Ca particles, 0.5wt% of nickel-coated carbon nanotubes on the surface, 11wt% of Li, the balance of Mg, and the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.02wt%. micron scale Al 2 The particle size of the Ca particles is 5-30 μm. Submicron scale Al 2 The particle size of the Ca particles is 0.01-5 μm. Carbon nanotubes are single-walled or multi-walled carbon nanotubes with an aspect ratio greater than 20.

[0027] The Al 2 The preparation method of Ca particle and carbon nanotube hybrid reinforced ultra-light magnesium-lithium matrix composite is as follows:

[0028] In the first step, the micron / submicron scale Al 2 Ca particles are mixed with magnesium powder, and after mixing, they are ball-milled in...

Embodiment 2

[0033] a kind of Al 2 Ca particle and carbon nanotube hybrid reinforced ultra-light magnesium-lithium matrix composite material, comprising the following components in weight percent: 10wt% micron-scale Al 2 Ca particles, 3 wt% submicron scale Al 2 Ca particles, 1wt% of nickel-plated carbon nanotubes on the surface, 16wt% of Li, the balance of Mg, and the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.02wt%. micron scale Al 2 The particle size of the Ca particles is 5-30 μm. Submicron scale Al 2 The particle size of the Ca particles is 0.01-5 μm. Carbon nanotubes are single-walled or multi-walled carbon nanotubes with an aspect ratio greater than 20.

[0034] The Al 2 The preparation method of Ca particle and carbon nanotube hybrid reinforced ultra-light magnesium-lithium matrix composite is as follows:

[0035] In the first step, the micron / submicron scale Al 2 Ca particles are mixed with magnesium powder, and after mixing, they are ball-milled in a ...

Embodiment 3

[0040] a kind of Al 2 Ca particle and carbon nanotube hybrid reinforced ultra-light magnesium-lithium matrix composite material, comprising the following components in weight percent: 20wt% micron-scale Al 2 Ca particles, 5 wt% submicron scale Al 2 Ca particles, 3wt% of nickel-plated carbon nanotubes on the surface, 25wt% of Li, the balance of Mg, and the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.02wt%. micron scale Al 2 The particle size of the Ca particles is 5-30 μm. Submicron scale Al 2 The particle size of the Ca particles is 0.01-5 μm. Carbon nanotubes are single-walled or multi-walled carbon nanotubes with an aspect ratio greater than 20.

[0041] The Al 2 The preparation method of Ca particle and carbon nanotube hybrid reinforced ultra-light magnesium-lithium matrix composite is as follows:

[0042] In the first step, the micron / submicron scale Al 2 Ca particles are mixed with magnesium powder, and after mixing, they are ball-milled in ...

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Abstract

The invention relates to the technical field of metal materials, in particular to an Al2Ca particle and carbon nano tube hybrid reinforced ultra-light magnesium-lithium-based composite material and apreparation method. The composite material comprises the following components of, by weight, 5-20wt.% of micron-scale Al2Ca particles, 1-5wt.% of submicron-scale Al2Ca particles, 0.5-3wt.% of a carbonnano tube with the surface plated with nickel, 11-25wt.% of Li and the balance Mg, and the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.02wt.%. The preparation method comprisesthe three steps of pretreatment of the micron-scale / submicron-scale Al2Ca particles, pretreatment of the carbon nano tube and smelting. The beta-Li single-phase ultra-light magnesium-lithium alloy isused as a matrix, and the reinforced phase with relatively low density is selected, and then the obtained magnesium-lithium-based composite material still has the excellent light-weight advantage; themicron-scale / submicron-scale Al2Ca particles and the carbon nano tube are used as the reinforced phases, then different functions of the reinforced phases of different types and scales in the reinforcement aspect are played, the cooperative reinforcement effect is achieved through the hybrid enhancement, and the reinforcement effect is far higher than that of a traditional magnesium-lithium-basedcomposite material reinforced by the reinforced phase of the single type and the single scale.

Description

technical field [0001] The invention relates to the technical field of metal materials, relates to a magnesium-lithium-based composite material and a preparation method thereof, in particular to an Al 2 Ca particles and carbon nanotubes hybrid reinforced ultralight Mg-Li matrix composites. Background technique [0002] In the field of modern aerospace, the weight reduction requirements for aircraft structures are no longer "care about every detail", but "care about every detail". Therefore, the development of new ultra-light metal structural materials is particularly important. Magnesium-lithium alloy is an alloy material with magnesium and lithium as the main constituent elements. Since the density of lithium is only 0.534g / cm 3 , Magnesium-lithium alloy is by far the lightest metal structure material. According to the different lithium content, the density of magnesium-lithium alloy is 1.25-1.65g / cm 3 It is not only far lower than steel, titanium alloy and aluminum all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/02C22C1/10C23C18/32
CPCC22C1/02C22C1/1005C22C1/101C22C1/1036C22C23/00C23C18/32C22C1/1047
Inventor 张扬秦希云陈晓阳刘骁卢雅琳李小平
Owner JIANGSU UNIV OF TECH
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