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A high-strength plastic high-rigidity aluminum matrix composite material and its preparation method

An aluminum matrix composite material, high stiffness technology, applied in the field of metal material preparation, can solve problems such as failure, crack initiation, inability to give full play to the maximum performance of particles, and achieve the effect of reducing surface energy, reducing stress concentration effect, and benefiting performance

Active Publication Date: 2022-06-28
NANJING UNIV OF SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, flake-shaped particles are prone to stress concentration in the length direction, leading to crack initiation, and premature failure when bearing stress. Their application is greatly limited, and the maximum performance of the particles cannot be fully exerted.

Method used

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  • A high-strength plastic high-rigidity aluminum matrix composite material and its preparation method
  • A high-strength plastic high-rigidity aluminum matrix composite material and its preparation method
  • A high-strength plastic high-rigidity aluminum matrix composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1): Prepare 20g aluminum-magnesium master alloy powder (particle size≤2μm, magnesium content 49.5%~50.5%), 6g high-purity silicon powder (particle size≤1μm, purity>99.95%), 2.5g high-purity copper powder (particle size≤1μm, purity>99.95%) ≤1μm, purity>99.95%), 1.5g high-purity manganese powder (grain size≤1μm, purity>99.95%), 167g aluminum-aluminum-boron-carbon alloy powder (grain size≤50nm, purity>99.9%, Al 3 BC content is 30%), 5g high-purity titanium powder (particle size≤20nm, purity>99.95%), 798g industrial pure aluminum powder (particle size≤50μm, purity>99.7%) as raw materials;

[0031] (2): ball milling, mix the raw material powder evenly, carry out ball milling on a ball mill for 4 hours, the ball milling speed is 200r / min, the mass ratio of ball to material is 10:1, and then the powder is pressed and formed by a hydraulic press;

[0032] (3): vacuum sintering, put the pressed block into a vacuum furnace for sintering, the temperature is 750 ° C, the temperatu...

Embodiment 2

[0036] (1): Prepare 20g aluminum-magnesium master alloy powder (particle size≤2μm, magnesium content 49.5%~50.5%), 6g high-purity silicon powder (particle size≤1μm, purity>99.95%), 2.5g high-purity copper powder (particle size≤1μm, purity>99.95%) ≤1μm, purity>99.95%), 1.5g high-purity manganese powder (grain size≤1μm, purity>99.95%), 500g aluminum-aluminum-boron-carbon alloy powder (grain size≤50nm, purity>99.9%, Al 3 BC content is 30%), 7g high-purity titanium powder (particle size≤20nm, purity>99.95%), 463g industrial pure aluminum powder (particle size≤50μm, purity>99.7%) as raw materials;

[0037] (2): ball milling, mix the raw material powder evenly, carry out ball milling on a ball mill for 5 hours, the ball milling speed is 200r / min, and the mass ratio of ball to material is 20:1, and then press the powder with a hydraulic press;

[0038] (3): vacuum sintering, put the pressed block into a vacuum furnace for sintering, the temperature is 750 ° C, the heat preservation i...

Embodiment 3

[0042] (1): Prepare 20g aluminum-magnesium master alloy powder (particle size≤2μm, magnesium content 49.5%~50.5%), 6g high-purity silicon powder (particle size≤1μm, purity>99.95%), 2.5g high-purity copper powder (particle size≤1μm, purity>99.95%) ≤1μm, purity>99.95%), 1.5g high-purity manganese powder (grain size≤1μm, purity>99.95%), 666.7g aluminum-aluminum-boron-carbon alloy powder (grain size≤50nm, purity>99.9%, Al 3 BC content is 30%), 9g high-purity titanium powder (particle size≤20nm, purity>99.95%), 294.3g industrial pure aluminum powder (particle size≤50μm, purity>99.7%) as raw materials;

[0043] (2): ball milling, mix the raw material powder evenly, carry out ball milling on a ball mill for 8 hours, the ball milling speed is 240r / min, the mass ratio of the ball to the material is 20:1, and then the powder is pressed and formed by a hydraulic press;

[0044] (3): vacuum sintering, put the pressed block into a vacuum furnace for sintering, the temperature is 750 ° C, t...

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Abstract

The invention discloses a high-strength plastic high-rigidity aluminum matrix composite material and a preparation method. It includes the following steps: (1): raw powder preparation; (2): ball milling: after ball milling, use a hydraulic press to press the powder into shape; (3): vacuum sintering: put the pressed block into a vacuum furnace for sintering to obtain the mass fraction 5% to 30% modified Al 3 BC / aluminum-magnesium-silicon composite material, Al in the composite material 3 The morphology of BC particles is spherical, with a core-shell structure, and the core is Al 3 BC phase, the shell part is a TiBC ternary phase composed of Ti, B and C, with a size of 50nm-200nm, uniformly distributed in the matrix; step (4): extrusion deformation. The innovative regulation of Al in this patent 3 The shape and scale of BC make its shape change from flake shape to spherical particle shape, so as to improve the anisotropy of the composite material and make it isotropic, so as to realize the high rigidity and high strength plasticity of the composite material.

Description

technical field [0001] The invention belongs to the field of metal material preparation, in particular to a high-strength plastic and high-rigidity aluminum-based composite material and a preparation method. Background technique [0002] With the improvement of light weight, energy saving and emission reduction standards, and the development of transportation, aerospace and biomedical fields, the performance of traditional aluminum alloy materials is more and more difficult to meet the requirements of use. , Lightweight aluminum alloys with high ductility and high stiffness are attracting more and more attention to improve energy efficiency and reduce energy emissions. However, the stiffness of aluminum alloy is low, and its elastic modulus is usually around 70GPa, which is difficult to improve by alloying. Studies have shown that the stiffness of aluminum alloys can be improved by adding high-modulus reinforcing phases. Compared with common ceramic particle reinforcement ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C21/00C22C32/00B22F3/14B22F9/04B22F3/20
CPCC22C1/058C22C21/00C22C32/0047B22F3/14B22F9/04B22F3/20B22F2009/043B22F2003/208
Inventor 聂金凤陈玉瑶刘桂亮刘相法
Owner NANJING UNIV OF SCI & TECH