Preparation method of hybrid hollow sphere metal-matrix lightweight composite material

A composite material and hollow sphere technology, which is applied in the field of preparation of hybrid hollow sphere metal matrix lightweight composite materials, can solve the problems of high cost, complex preparation process, high density, etc. Effect

Inactive Publication Date: 2015-04-08
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a manufacturing method of mixed hollow sphere metal matrix lightweight composite material, which solves the problems of high cost, high density and complicated preparation process of general hollow sphere metal matrix composite materials

Method used

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  • Preparation method of hybrid hollow sphere metal-matrix lightweight composite material
  • Preparation method of hybrid hollow sphere metal-matrix lightweight composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this embodiment, the aluminum alloy material is selected as the metal base 3, and SiC hollow spheres and Al alloys mixed in any proportion are selected. 2 o 3 Hollow ball 4, the diameter of the hollow ball is 0.5mm-5mm, SiC hollow ball and Al 2 o 3 The hollow sphere has a high melting point and high hardness, and can be fully mixed with aluminum alloy without significantly reducing the compressibility of the alloy material.

[0028] The mold used for the preparation method (see figure 2 ) consists of a furnace 1, an electromagnetic stirring device and an electromagnetic stirring heating furnace 2 formed by a heating device, and a cooler 5. The preparation steps are as follows: firstly add a commercially available aluminum alloy ingot into the electromagnetic stirring heating furnace 2, heat it to 500-650° C. to melt and then keep it warm; then weigh the aluminum alloy ingot according to 1.0%-5.0% (mass fraction) The tackifier is added to the electromagnetic stir...

Embodiment 2

[0031] This embodiment is compared with embodiment 1, and difference is that the Al of large diameter is selected for use 2 o 3 Hollow spheres and SiC hollow spheres with smaller diameters, in which Al with a diameter of 1-5mm 2 o 3 The amount of hollow spheres added accounts for 20%-50% of the volume of the liquid aluminum alloy, the amount of SiC hollow spheres with a diameter of 0.5-1mm added accounts for 3-5% of the volume of the liquid aluminum alloy, and the rest of the conditions are the same. The small-diameter SiC hollow spheres on the one hand play the role of increasing the viscosity of the aluminum liquid to improve the uniformity of the composite material, and at the same time can fill the large-sized Al 2 o 3 The voids between the hollow spheres further reduce the density of the composite material. Take out the molded metal matrix composite, weigh and calculate the density and porosity, and use the compression test method to test its mechanical properties. C...

Embodiment 3

[0033] This embodiment is compared with embodiment 2, except the large-diameter Al in the selected hollow sphere 2 o 3 In addition to hollow spheres and SiC hollow spheres with smaller diameters, the types of hollow spheres also include C hollow spheres and vitrified microspheres. The four types of hollow spheres are mixed in any proportion, and the viscosity enhancer is selected at 3%-5% (mass fraction) The fly ash to further reduce production costs, the rest of the conditions are the same.

[0034] Take out the molded metal matrix composite, weigh and calculate the density and porosity, and use the compression test method to test its mechanical properties. Compared with the existing method of preparing hollow sphere composite materials, this method uses 4 kinds of mixed hollow spheres with different particle sizes as fillers. Under the premise of ensuring the material performance, the porosity can reach more than 50%, thereby minimizing the Material density, while also fur...

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Abstract

The invention relates to a preparation method of a hybrid hollow sphere metal-matrix lightweight composite material. A metal-matrix composite material containing closed bubble holes is formed by filling hollow spheres into metal matrix; the hollow spheres are SiC hollow spheres, Al2O3 hollow spheres, C hollow spheres or two or more hybrid hollow spheres which are the same or different in diameter and are mixed at any ratio in glass beads; and the metal matrix is commercially available aluminum, magnesium, zinc, copper, titanium and iron or aluminum alloy, magnesium alloy, zinc alloy, copper alloy, titanium alloy and iron alloy. The porosity of the hybrid hollow sphere metal-matrix lightweight composite material prepared by the method is over 50%; the density is significantly reduced; the compression strength of the material can be kept, and thus high strength and light weight are achieved; and meanwhile, the hybrid hollow sphere metal-matrix lightweight composite material has a plurality of functions of damping shock absorption, sound-insulated noise reduction, energy absorption and the like, and also has the advantages of low cost, simple process, and wide application range on hollow sphere varieties and dimensions, and can be continuously produced, and thus the production efficiency is greatly improved.

Description

technical field [0001] The invention relates to a method for preparing a mixed hollow sphere metal-based lightweight composite material. Specifically, two or more mixed hollow spheres with the same or different diameters and a tackifier are added to the metal matrix and manufactured by electromagnetic stirring. Methods for foam-structured metal matrix composites. It solves the problems of difficult process control and high production cost in the preparation of the existing foam structure metal matrix composite material, and can significantly reduce the material density under the condition of ensuring the material performance, so as to achieve the purpose of light weight. Background technique [0002] Metal matrix composites are composite materials with metal or alloy as the matrix and fibers, whiskers, particles, etc. as reinforcements, which can significantly improve the thermal expansion, strength, fracture toughness, impact toughness, and wear resistance of a single metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C33/04C22C32/00
Inventor 胡正飞张振蔡振武何大海蒋凯雁
Owner TONGJI UNIV
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