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Preparation method of magnesium-lithium matrix composite material reinforced by micro-nano scale reinforcement hybrid

A composite material and reinforcement technology, which is applied in the field of metal matrix composite materials and its preparation, can solve the problems of single-phase reinforcement reinforcement effect is not very prominent, micro-nano-scale reinforcement is easy to agglomerate, magnesium and lithium melt wettability is insufficient, etc. problem, to achieve the effect of increasing the capture capacity, reducing the possibility of burning, and enhancing the effect

Active Publication Date: 2021-08-06
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the insufficient strength and rigidity of magnesium-lithium alloy, the reinforcement effect of single-phase reinforcement is not very prominent, and the general micro-nano-scale ceramic reinforcement particles are easy to be burned when directly added to magnesium-lithium melt. Insufficient wettability and easy agglomeration of micro-nano-scale reinforcements, providing a preparation method for micro-nano-scale reinforcement hybrid reinforced magnesium-lithium matrix composites

Method used

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  • Preparation method of magnesium-lithium matrix composite material reinforced by micro-nano scale reinforcement hybrid

Examples

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Embodiment 1

[0033] This example relates to a micro-nano-scale reinforcement hybrid reinforced magnesium-lithium-based composite material. In the magnesium-lithium-based composite material, the mass percentages of each component are: Li 15%, Al 1%, Zn 2%, Gd 0.5 %, TiB 2 12% of particles, 3% of carbon nanotubes, and the balance of Mg and other impurities. TiB 2 The particle size of the particles is 0.8um, the diameter of the carbon nanotube is 8nm, and the length is 1um.

[0034] This example relates to a method for preparing a micro-nano-scale reinforcement hybrid reinforced magnesium-lithium-based composite material. The process includes three stages: pretreatment of the reinforcement, smelting under a protective atmosphere, and plastic deformation:

[0035] Pretreatment of reinforcement: Al plating on the surface of carbon nanotubes 2 Ce, TiB 2 The particles, carbon nanotubes and magnesium chips are mixed and ball milled on a planetary ball mill to prepare mixed powder. The low spee...

Embodiment 2

[0040] This example relates to a magnesium-lithium-based composite material reinforced by a micronanoscale reinforcement hybrid. In the magnesium-lithium-based composite material, the mass percentages of each component are: Li 10%, Al 5%, Zn 4%, Gd 2 %, TiB 2 6% of particles, 2% of carbon nanotubes, and the balance of Mg and other impurities. TiB 2 The particle size of the particles is 0.5 μm, the diameter of the carbon nanotube is 8 nm, and the length is 1 μm.

[0041] This example relates to a method for preparing a micro-nano-scale reinforcement hybrid reinforced magnesium-lithium-based composite material. The process includes three stages: pretreatment of the reinforcement, smelting under a protective atmosphere, and plastic deformation:

[0042] Pretreatment of reinforcement: Al plating on the surface of carbon nanotubes 2 Ce, TiB 2 The particles, carbon nanotubes and magnesium chips are mixed and ball milled on a planetary ball mill to prepare mixed powder. The low s...

Embodiment 3

[0047] This example relates to a magnesium-lithium-based composite material reinforced by a micronanoscale reinforcement hybrid. In the magnesium-lithium-based composite material, the mass percentages of each component are: Li 8%, Al 5%, Zn 3%, Gd 1 %, TiB 2 3% of particles, 1% of carbon nanotubes, and the balance of Mg and other impurities. TiB 2 The particle size of the particles is 0.01 μm, the diameter of the carbon nanotube is 8 nm, and the length is 1 μm.

[0048] This example relates to a method for preparing a micro-nano-scale reinforcement hybrid reinforced magnesium-lithium-based composite material. The process includes three stages: pretreatment of the reinforcement, smelting under a protective atmosphere, and plastic deformation:

[0049] Pretreatment of reinforcement: Al plating on the surface of carbon nanotubes 2 Ce, the micro-nano TiB 2 The particles, carbon nanotubes and magnesium chips are mixed and ball milled on a planetary ball mill to prepare mixed po...

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Abstract

The invention discloses a preparation method of a micro-nano-scale reinforcement hybrid reinforced magnesium-lithium-based composite material, in particular to a micro-nano-scale TiB 2 Preparation method of particle and carbon nanotube hybrid reinforced Mg‑Li‑Al‑Zn‑Gd composite. The preparation method includes three stages of pretreatment of reinforcement, smelting under protective atmosphere and plastic deformation. The present invention uses a two-phase hybrid reinforcement to reinforce the composite material, exerts the different effects of different types of reinforcement phases in strengthening, and uses hybrid reinforcement to achieve the effect of synergistic reinforcement. At the same time, through the pretreatment of the reinforcement, smelting and plastic deformation under a protective atmosphere, The clusters of nano-reinforcement are overcome, the uniform distribution of reinforcement in the matrix alloy and the good interface bonding with the alloy matrix are realized, and a composite material with high strength and elastic modulus and certain plasticity is obtained. Moreover, the technological process of the invention is simple and controllable, suitable for mass production, and shows broad application prospects in the aerospace field.

Description

technical field [0001] The present invention relates to a preparation method of a micro-nano-scale reinforcement hybrid reinforced magnesium-lithium-based composite material, in particular to a micro-nano-scale TiB 2 The invention discloses a method for preparing Mg-Li-Al-Zn-Gd composite materials mixed with particles and carbon nanotubes, belonging to the field of metal matrix composite materials and their preparation. Background technique [0002] The demand for ultra-light and high-strength structural materials in modern industry is becoming more and more urgent, and magnesium-lithium alloys, as the lightest metal structural materials, are also receiving more and more attention. The density of magnesium-lithium alloy is generally 1.20-1.65g / cm 3 , At the same time, it has high specific strength, specific stiffness, good electromagnetic shielding performance and machinability, so magnesium-lithium alloys are widely used in military, aerospace and electronic products and o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/03C22C1/10C22C32/00B22F9/04
CPCC22C23/00C22C1/1036C22C1/1005C22C32/0073B22F9/04B22F2009/043C22C1/1047
Inventor 刘文才丁德华吴国华冀浩廖光澜丁文江
Owner SHANGHAI JIAOTONG UNIV
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