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A kind of preparation method of porous metal matrix composite material with double-walled core-shell structure hollow glass microspheres

A technology of hollow glass microspheres and core-shell structure, which is applied in the field of preparation of porous metal matrix composite materials, can solve the problems of hollow glass microspheres being easily broken, the porosity of porous composite materials decreasing, and the wall thickness of hollow glass microspheres increasing. Achieve the effects of easy operation, improved carrying capacity and low cost

Active Publication Date: 2022-08-05
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the increase of the wall thickness of the hollow glass microspheres will affect the decrease of the porosity of the prepared porous composite material, and the hollow glass microspheres are easy to break in the process of preparing the porous composite material by using the hollow glass microspheres, a double Preparation method of porous metal matrix composite material of hollow glass microspheres with wall core-shell structure

Method used

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  • A kind of preparation method of porous metal matrix composite material with double-walled core-shell structure hollow glass microspheres
  • A kind of preparation method of porous metal matrix composite material with double-walled core-shell structure hollow glass microspheres
  • A kind of preparation method of porous metal matrix composite material with double-walled core-shell structure hollow glass microspheres

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specific Embodiment approach 1

[0028] Specific embodiment 1: The preparation method of the porous metal matrix composite material with double-walled core-shell hollow glass microbeads in this embodiment is carried out according to the following steps:

[0029] 1. Weighing: Weigh the hollow glass beads and the metal matrix; use the floating method to select the hollow glass beads before weighing, and then dry them; when the hollow glass beads are selected by the floating method, the hollow glass beads The powder is placed in deionized water or alcohol solution, and the floating hollow glass beads are selected. The hollow glass microbeads are screened in deionized water or alcohol solution by flotation method, which ensures the integrity of the hollow glass microbeads in the composite material.

[0030] The metal matrix is ​​Al-3Mg (the mass fraction of Mg is 3%), Al-6Mg or Al-9Mg;

[0031] The volume of the metal matrix is ​​the volume of voids between particles when the hollow glass microspheres are stacke...

specific Embodiment approach 2

[0041] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the average particle size of the hollow glass microbeads in step 1 is 20 μm˜80 μm.

specific Embodiment approach 3

[0042] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the wall thickness-to-radius ratio (r / R) of the hollow glass microspheres in step 1 is 0.043-0.064.

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Abstract

A preparation method of a porous metal matrix composite material with hollow glass microbeads of double-walled core-shell structure relates to a preparation method of a porous metal matrix composite material. In order to solve the problem that the increase of the wall thickness of the hollow glass microspheres will affect the decrease of the porosity of the prepared porous composite materials, and the hollow glass microspheres are easily broken during the process of preparing the porous composite materials by using the hollow glass microspheres. Method: Weigh hollow glass microspheres and metal matrix; the metal matrix is ​​Al-3Mg, Al-6Mg or Al-9Mg, preheat and prepare metal matrix, and infiltrate with liquid metal. The invention selects a metal matrix containing metal magnesium, improves the wettability between the hollow glass microspheres and the metal matrix aluminum during the infiltration process, and generates MgAl on the surface of the hollow glass microspheres 2 O 4 layer, so that the bearing capacity of hollow glass microspheres is improved. The present invention is suitable for preparing porous metal matrix composite materials.

Description

technical field [0001] The invention relates to a preparation method of a porous metal matrix composite material. Background technique [0002] Porous materials are widely used in important fields such as military due to their excellent anti-shock load and anti-vibration capabilities. Porous materials have gradually transitioned from traditional metal foams to porous metal matrix composites. Porous metal matrix composites are more traditional. The foam metal has better comprehensive properties, and the peak stress and energy absorption capacity are greatly improved. The strength of the metal hollow spheres in the reinforcement of the porous composite material is high, but its density is also high. Compared with the ceramic hollow spheres, the strength of the hollow metal spheres is lower than that of the metal hollow spheres, but its density is significantly lower than that of the metal hollow spheres. Therefore, the prepared porous composite The density of the material is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D23/04C22C1/08
CPCB22D23/04C22C1/08C22C1/081
Inventor 张强孙凯王智君杨文澍姜龙涛陈国钦修子扬武高辉
Owner HARBIN INST OF TECH