Unlock instant, AI-driven research and patent intelligence for your innovation.

Micro-nano-scale two-phase hybrid particle reinforced magnesium-lithium matrix composite material and preparation method thereof

A composite material and particle 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, wettability is insufficient, etc., to achieve increased Capability of capture, good strengthening effect, effect of reducing burning loss

Active Publication Date: 2021-11-12
SHANGHAI JIAOTONG UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the lack of strength and stiffness of magnesium-lithium alloys, the reinforcing effect of single-phase reinforcements 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, etc., provide a micro-nano-scale dual-phase hybrid particle-reinforced magnesium-lithium-based composite material and its preparation method

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

[0030] This embodiment relates to a magnesium-lithium-based composite material reinforced by micro-nano-scale dual-phase hybrid particles. In the magnesium-lithium-based composite material, the mass percentages of each component are: Li 14%, Al 1%, Zn 2%, Ce 0.1%, TiB 2 Granules 8%, B 4 C particles 8%, the balance is Mg and other impurities. TiB 2 , B 4 The particle diameter of the C particles was 1.5 μm.

[0031] This example relates to a method for preparing a magnesium-lithium-based composite material reinforced with micro-nano-scale two-phase hybrid particles. The process includes three stages: pretreatment of the reinforcement, smelting under a protective atmosphere, and plastic deformation:

[0032] Reinforcement pretreatment: TiB 2 , B 4 C particles and magnesium chips are mixed and ball milled on a planetary ball mill at a mass ratio of 1:1:1 to prepare a mixed powder. The ball milling speed is 400rpm, the ball milling time is 18h, and the ball-to-material ratio ...

Embodiment 2

[0037] This embodiment relates to a magnesium-lithium-based composite material reinforced by micro-nano-scale dual-phase hybrid particles. In the magnesium-lithium-based composite material, the mass percentages of each component are: Li 10%, Al 3%, Zn 4%, Ce 2%, TiB 2 Granules 4%, B 4 C particles 4%, the balance is Mg and other impurities. TiB 2 , B 4 The particle diameter of the C particles was 0.5 μm.

[0038] This example relates to a method for preparing a magnesium-lithium-based composite material reinforced with micro-nano-scale two-phase hybrid particles. The process includes three stages: pretreatment of the reinforcement, smelting under a protective atmosphere, and plastic deformation:

[0039] Reinforcement pretreatment: TiB 2 , B 4 C particles and magnesium chips are mixed and ball milled on a planetary ball mill at a mass ratio of 1:1:5 to prepare mixed powder. The ball milling speed is 150rpm, the ball milling time is 36h, and the ball-to-material ratio is 2...

Embodiment 3

[0044] This embodiment relates to a magnesium-lithium-based composite material reinforced by micro-nano-scale two-phase hybrid particles. In the magnesium-lithium-based composite material, the mass percentages of each component are: Li 8%, Al 2%, Zn 3%, Ce 0.5%, TiB 2 Granules 2%, B 4 C particles 2%, the balance is Mg and other impurities. TiB 2 , B 4 The particle diameter of the C particles was 0.05 μm.

[0045] This example relates to a method for preparing a magnesium-lithium-based composite material reinforced with micro-nano-scale two-phase hybrid particles. The process includes three stages: pretreatment of the reinforcement, smelting under a protective atmosphere, and plastic deformation:

[0046] Reinforcement pretreatment: TiB 2 Granules, B 4 C particles and magnesium chips are mixed and ball milled on a planetary ball mill at a mass ratio of 1:1:10 to prepare mixed powder. The ball milling speed is 800rpm, the ball milling time is 2h, and the ball-to-material r...

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
particle sizeaaaaaaaaaa
densityaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a micronano-level two-phase hybrid particle reinforced magnesium-lithium-based composite material and a preparation method thereof; the components of the composite material are: Li 6-15%, Al 1-3%, Zn 2-6%, Ce 0.1‑2%, TiB 2 0.5‑8%, B 4 C 0.5‑8%, the balance is Mg and unavoidable impurities. Its preparation includes pretreatment of reinforcement, melting and plastic deformation stages. The present invention uses two-phase hybrid particles to reinforce the composite material. These two reinforcements have a synergistic reinforcing effect in the composite material. At the same time, through the pretreatment of the reinforcement, smelting and plastic deformation under a protective atmosphere, the clusters of micro-nano particles are overcome. The uniform distribution of the reinforcement in the matrix alloy and the good interface bonding with the alloy matrix are realized, and a composite material with high strength, elastic modulus and certain plasticity is obtained; and the invention process is simple and controllable, suitable for mass production, It shows broad application prospects in aerospace field.

Description

technical field [0001] The invention belongs to the field of metal-based composite materials and their preparation, and relates to a micro-nano-scale two-phase hybrid particle-reinforced magnesium-lithium-based composite material and a preparation method thereof, in particular to a micro-nano-scale TiB 2 and B 4 C hybrid particle reinforced Mg-Li-Al-Zn-Ce composite material and its preparation method. 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 other fields. Howe...

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 Patents(China)
IPC IPC(8): C22C23/00C22C32/00C22C1/10C22C1/03
CPCC22C23/00C22C32/0047C22C1/1036C22C1/1015C22C1/1021C22C1/1047
Inventor 丁德华刘文才吴国华冀浩
Owner SHANGHAI JIAOTONG UNIV