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A multi-component multi-scale hybrid reinforced magnesium-lithium matrix composite material and its preparation method

A composite material and multi-scale technology, applied in the field of metal materials, can solve problems such as adverse effects of plasticity and density, low absolute strength, and restrictions on the advancement of research and application of metal matrix composite materials, so as to improve dispersion and light weight Advantages, significant solid solution strengthening effect

Active Publication Date: 2021-07-02
昆山佐菲机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the existing research results, although composite strengthening can significantly improve the mechanical properties of magnesium-lithium alloys, its absolute strength is still relatively low. In addition, the addition of a large amount of reinforcing phase will also have an adverse effect on its plasticity and density.
Most of the traditional metal matrix composites only add a single reinforcing phase, and only play a synergistic effect by adjusting the spatial distribution and interface control between the two phases, which limits the advancement of the research and application of metal matrix composites.

Method used

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  • A multi-component multi-scale hybrid reinforced magnesium-lithium matrix composite material and its preparation method

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Effect test

Embodiment 1

[0026] A multi-component multi-scale hybrid reinforced magnesium-lithium matrix composite material, comprising the following components by weight ratio: 5wt% micron titanium carbide particles, 1wt% nanometer titanium carbide particles, 0.5wt% nickel-coated multi-walled carbon nanotubes , 3wt% of Al, 8wt% of Li, the balance of Mg, the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.02wt%.

[0027] The preparation method of the multi-component multi-scale hybrid reinforced magnesium-lithium matrix composite material is as follows:

[0028] The first step is to mix micron titanium carbide particles, nano titanium carbide particles, nickel-coated multi-walled carbon nanotubes with Al powder, and then ball mill in a planetary ball mill to obtain composite powder. The ball milling speed is 100r / min, and the ball milling time is 3h ;

[0029] The second step is to pre-press the composite powder obtained by ball milling to obtain a pre-pressed block, the pre-pressi...

Embodiment 2

[0032] A multi-element and multi-scale hybrid reinforced magnesium-lithium matrix composite material, comprising the following components by weight ratio: 10wt% micron titanium carbide particles, 2wt% nanometer titanium carbide particles, 1wt% nickel-coated multi-walled carbon nanotubes, 4.5wt% of Al, 11wt% of Li, the balance of Mg, and the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.02wt%.

[0033] The preparation method of the multi-component multi-scale hybrid reinforced magnesium-lithium matrix composite material is as follows:

[0034] The first step is to mix micron titanium carbide particles, nickel-coated multi-walled carbon nanotubes and Al powder, and then ball mill in a planetary ball mill to obtain a composite powder. The ball milling speed is 200r / min, and the ball milling time is 2h;

[0035] The second step is to pre-press the composite powder obtained by ball milling to obtain a pre-pressed block, the pre-pressing pressure is 20MPa, and t...

Embodiment 3

[0039] A multi-component multi-scale hybrid reinforced magnesium-lithium matrix composite material, comprising the following components by weight ratio: 15wt% micron titanium carbide particles, 3wt% nanometer titanium carbide particles, 1.5wt% nickel-coated multi-walled carbon nanotubes , 6wt% of Al, 14wt% of Li, the balance of Mg, the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.02wt%.

[0040] The preparation method of the multi-component multi-scale hybrid reinforced magnesium-lithium matrix composite material is as follows:

[0041] The first step is to mix micron titanium carbide particles, nano titanium carbide particles, nickel-coated multi-walled carbon nanotubes with Al powder, and then ball mill in a planetary ball mill to obtain a composite powder. The ball milling speed is 300r / min, and the ball milling time is 1h ;

[0042] The second step is to pre-press the composite powder obtained by ball milling to obtain a pre-pressed block, the pre-pr...

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Abstract

The invention relates to the technical field of metal materials, in particular to a multi-element and multi-scale hybrid reinforced magnesium-lithium-based composite material and a preparation method thereof. A multi-component multi-scale hybrid reinforced magnesium-lithium matrix composite material, with magnesium-lithium alloy as the matrix, micron titanium carbide particles, nano-titanium carbide particles, and nickel-coated multi-walled carbon nanotubes as the reinforcing phase, including the following components in weight ratio Minutes: 5-15wt.% of micron titanium carbide particles, 1-3wt.% of nano-titanium carbide particles, 0.5-1.5wt% of nickel-coated multi-walled carbon nanotubes, 3-6wt.% of Al, 8-14wt. % Li, the balance Mg, and the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.02wt.%. The invention also provides its preparation method. The magnesium-lithium-based composite material prepared by the invention greatly improves the strength of the magnesium-lithium-based composite material and ensures good plasticity without significantly increasing the material density.

Description

technical field [0001] The invention relates to the technical field of metal materials, and relates to a magnesium-lithium-based composite material and a preparation method thereof, in particular to a multi-element and multi-scale hybrid reinforced magnesium-lithium-based composite material and a preparation method thereof. Background technique [0002] Magnesium alloy is a kind of lightweight metal structure material widely studied and applied. Lithium (Li, density is only 0.534g / cm 3 ) as an alloying element by adding magnesium (Mg, with a density of 1.736g / cm 3 ) can further reduce the density of magnesium alloys, and the obtained magnesium-lithium alloys are the metal structure materials with the smallest density so far, known as "ultra-light alloys". Foreign countries have even developed magnesium-lithium "dream alloys" that can float on water . When the lithium content is below 5.7wt.%, the alloy is a hexagonal close-packed α-Mg single-phase structure; when the lithi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C32/00C22C1/10C22C1/02
CPCC22C23/00C22C32/0052C22C1/1036C22C2026/002C22C1/1047
Inventor 张扬李飞龙陈晓阳卢雅琳李小平
Owner 昆山佐菲机电科技有限公司
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