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al 2 Ca particle and carbon nanotube hybrid reinforced ultra-light magnesium-lithium matrix 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: 2021-01-19
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • al <sub>2</sub> Ca particle and carbon nanotube hybrid reinforced ultra-light magnesium-lithium matrix composite material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] an Al 2 Ca particle and carbon nanotube hybrid reinforced ultra-light magnesium-lithium-based composite containing the following components in weight percent: 5 wt % micron-scale Al 2 Ca particles, 1 wt% submicron-scale Al 2 Ca particles, 0.5 wt % of nickel-plated carbon nanotubes, 11 wt % of Li, the balance being Mg, and the total amount of impurity elements Si, Fe, Cu and Ni less than 0.02 wt %. Microscale Al 2 The particle size of the Ca particles is 5 to 30 μm. Submicron scale Al 2 The particle size of the Ca particles is 0.01 to 5 μm. The 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 particles and carbon nanotubes hybrid reinforced ultra-light magnesium-lithium matrix composites is as follows:

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

Embodiment 2

[0033] an Al 2 Ca particle and carbon nanotube hybrid reinforced ultra-light magnesium-lithium-based composite containing the following components in weight percent: 10 wt % of micron-scale Al 2 Ca particles, 3wt% submicron-scale Al 2 Ca particles, 1 wt % of nickel-coated carbon nanotubes, 16 wt % of Li, the balance being Mg, and the total amount of impurity elements Si, Fe, Cu and Ni less than 0.02 wt %. Microscale Al 2 The particle size of the Ca particles is 5 to 30 μm. Submicron scale Al 2 The particle size of the Ca particles is 0.01 to 5 μm. The 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 particles and carbon nanotubes hybrid reinforced ultra-light magnesium-lithium matrix composites is as follows:

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

Embodiment 3

[0040] an Al 2 Ca particle and carbon nanotube hybrid reinforced ultra-light magnesium-lithium-based composite containing the following components in weight percent: 20 wt % of micron-scale Al 2 Ca particles, 5wt% submicron-scale Al 2 Ca particles, 3 wt % of nickel-plated carbon nanotubes, 25 wt % of Li, the balance being Mg, and the total amount of impurity elements Si, Fe, Cu and Ni less than 0.02 wt %. Microscale Al 2 The particle size of the Ca particles is 5 to 30 μm. Submicron scale Al 2 The particle size of the Ca particles is 0.01 to 5 μm. The 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 particles and carbon nanotubes hybrid reinforced ultra-light magnesium-lithium matrix composites is as follows:

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

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Abstract

The invention relates to the technical field of metal materials, especially an Al 2 Ca particles and carbon nanotube hybrid reinforced ultra-light magnesium-lithium-based composite material and preparation method thereof, comprising the following components in weight percent: 5-20wt.% micron-scale Al 2 Ca particles, 1~5wt.% submicron scale Al 2 Ca particles, 0.5-3wt% of nickel-plated carbon nanotubes on the surface, 11-25wt.% of Li, the balance of Mg, and the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.02wt.%. Preparation methods include micron / submicron scale Al 2 There are three steps of Ca particle pretreatment, carbon nanotube pretreatment and smelting. By using β-Li single-phase ultra-light magnesium-lithium alloy as the matrix and selecting a reinforcement phase with a lower density, the obtained magnesium-lithium matrix composite still has excellent lightweight advantages; micron / submicron scale Al 2 Ca particles and carbon nanotubes are used as reinforcing phases to play different roles in strengthening of different types and scales of reinforcing phases. Hybrid reinforcement is used to achieve synergistic strengthening effects, and the strengthening effect is far superior to that of traditional single-type and single-scale reinforcing phases. composite material.

Description

technical field [0001] The invention relates to the technical field of metal materials, to a magnesium-lithium-based composite material and a preparation method thereof, in particular to an Al 2 Hybrid reinforcement of Ca particles and carbon nanotubes for ultralight magnesium-lithium-based composites. Background technique [0002] The weight reduction requirements of the aircraft structure in the modern aerospace field are no longer "calculating", but "calculating". 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 elements, because the density of lithium is only 0.534g / cm 3 , Mg-Li alloy is by far the lightest metal structural material. Depending on the lithium content, the density of magnesium-lithium alloys ranges from 1.25 to 1.65 g / cm 3 It is not only far lower than steel, titanium alloy and aluminum alloy, but also has obvious advan...

Claims

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Application Information

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Patent Type & Authority Patents(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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