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Preparation method of long-periodic-structure particle-reinforced magnesium-base/aluminum-base composite material

A technology of aluminum-based composite materials and long-period structures, applied in the field of new materials, can solve problems such as poor plasticity, high price, and limited mechanical properties of reinforced particles, and achieve the effects of good combination, high hardness, and excellent performance

Inactive Publication Date: 2018-08-07
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although ceramic particles have high hardness, their poor plasticity and weak bonding between the reinforcement phase and the matrix limit the potential application of composite materials.
[0005] In the prior art, the Chinese invention patent "A high-performance magnesium metal matrix composite material and its preparation method CN103695676" discloses a preparation method of LPSO phase particle-reinforced magnesium matrix composite material, which refers to the use of LPSO phase as the external reinforcement Add particles to magnesium alloy to prepare composite materials, but the LPSO phase content of the reinforced particles is only 65%, and the expensive heavy rare earth element Er needs to be used, which is not conducive to industrial production cost control
In addition, simply crushing the as-cast structure and adding it to the composite material as a reinforcing phase particle has limited mechanical properties of the reinforcing particle, and the surface oxidation and contamination of the particle are not conducive to further improving the performance of the composite material.

Method used

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  • Preparation method of long-periodic-structure particle-reinforced magnesium-base/aluminum-base composite material
  • Preparation method of long-periodic-structure particle-reinforced magnesium-base/aluminum-base composite material
  • Preparation method of long-periodic-structure particle-reinforced magnesium-base/aluminum-base composite material

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Experimental program
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Effect test

Embodiment 1

[0039] Magnesium matrix composites were prepared with magnesium powder as the matrix.

[0040] 1. Contains Mg 85 Zn6 Y 9 (at.%) Melting preparation of LPSO reinforced phase ingot

[0041] 1) Ingredients: according to Mg: 63.40wt%; Zn: 12.04wt%; Y: 24.56wt% (ie Mg 85 Zn 6 Y 9 (at.%)), the sub-mass percentage for batching, weighing the raw materials of pure magnesium, zinc block and Mg-30Y (note the removal of surface oxide).

[0042] 2) Melting: Clean the magnesium alloy melting furnace and preheat it to 450°C, then add the preheated pure magnesium ingot into the crucible of the melting furnace, and then heat it to 720°C; after the magnesium ingot is melted, add the preheated Zinc block and magnesium yttrium master alloy, then raise the furnace temperature by 20°C, keep the temperature for 15 minutes, and then mechanically stir for 3 minutes.

[0043] 3) Pouring: Afterwards, adjust the temperature to 720°C, keep the temperature for 10 minutes, skim off the scum on the sur...

Embodiment 2

[0051] Magnesium-based composites were prepared with AZ91 powder as the matrix.

[0052] 1. Contains Mg 85 Zn 6 Y 9 (at.%) Melting preparation of LPSO reinforced phase ingot

[0053] 1) Ingredients: according to the mass percentage of Mg: 63.40wt%; Zn: 12.04wt%; Y: 24.56wt% (ie Mg 85 Zn 6 Y 9 (at.%)) for batching, and weigh the raw materials of pure magnesium, zinc block and Mg-30Y (pay attention to remove the surface scale).

[0054] 2) Melting: Clean the magnesium alloy melting furnace and preheat it to 450°C, then add the preheated pure magnesium ingot into the crucible of the melting furnace, and then heat it to 720°C; after the magnesium ingot is melted, add the preheated Zinc block and magnesium yttrium master alloy, then raise the furnace temperature by 20°C, keep the temperature for 15 minutes, and then mechanically stir for 3 minutes.

[0055] 3) Pouring: Afterwards, adjust the temperature to 720°C, keep the temperature for 10 minutes, skim off the scum on the ...

Embodiment 3

[0063] Magnesium-based composites were prepared with aluminum powder as the matrix.

[0064] 1. Contains Mg 85 Zn 6 Y 9 (at.%) Melting preparation of LPSO reinforced phase ingot

[0065] 1) Ingredients: according to the mass percentage of Mg: 63.40wt%; Zn: 12.04wt%; Y: 24.56wt% (ie Mg 85 Zn 6 Y 9 (at.%)) for batching, and weigh the raw materials of pure magnesium, zinc block and Mg-30Y (pay attention to remove the surface scale).

[0066] 2) Melting: Clean the magnesium alloy melting furnace and preheat it to 450°C, then add the preheated pure magnesium ingot into the crucible of the melting furnace, and then heat it to 720°C; after the magnesium ingot is melted, add the preheated Zinc block and magnesium yttrium master alloy, then raise the furnace temperature by 20°C, keep the temperature for 15 minutes, and then mechanically stir for 3 minutes.

[0067] 3) Pouring: Afterwards, adjust the temperature to 720°C, keep the temperature for 10 minutes, skim off the scum on ...

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Abstract

The invention relates to a preparation method of a long-periodic-structure particle-reinforced magnesium-base / aluminum-base composite material. The preparation method comprises the steps of adding reinforced particles adopting an Mg-Zn-Y system into magnesium powder, aluminum powder, magnesium alloy powder or aluminum alloy powder, and carrying out hot-pressing and sintering by virtue of an SPS method or a cubic press method, so as to obtain the magnesium-base / aluminum-base composite material. The magnesium-base / aluminum-base composite material does not contain heavy rare earth elements such as Er, obtained reinforced phase particles are converted into nanocrystallines by virtue of high-energy ball milling, are high in hardness and have good bondability with a magnesium matrix / aluminum matrix, and the composite material with excellent performance is prepared.

Description

Technical field: [0001] The invention relates to a preparation method of reinforced magnesium / aluminum matrix composite material containing nanocrystalline LPSO phase particles, belonging to the field of new materials. Background technique: [0002] With the rapid development of aerospace, transportation, and electronic communication industries, higher requirements have been put forward for new materials, and new lightweight materials have attracted more and more attention from all walks of life at home and abroad. Traditional magnesium alloys and aluminum alloys have the characteristics of low density and high specific strength, but the low absolute strength limits their further industrial applications. [0003] In recent years, researchers have improved the comprehensive mechanical properties of magnesium alloys and made a series of progress by adding alloying elements to magnesium alloys. Among them, in 2001, Japanese scientist Noto Kawamura discovered that adding a cert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C21/00C22C23/00C22C1/03B22F9/04
CPCC22C1/0408B22F9/04B22F2009/043C22C1/03C22C1/0416C22C21/00C22C23/00C22C23/04C22C2200/04
Inventor 余晖李仲杰范少达彭秋明丁俭宋开红夏兴川
Owner HEBEI UNIV OF TECH
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