One-stage method for preparing metal matrix light-weighted composite material

A composite material and metal-based technology, which is applied in the field of preparing metal-based lightweight composite materials, can solve the problems of complex preparation process, high density and high cost, and achieve the effects of simple process flow, reduced density and fewer steps.

Inactive Publication Date: 2015-05-06
TONGJI UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for manufacturing foamed metal matrix composites, which solve

Method used

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  • One-stage method for preparing metal matrix light-weighted composite material
  • One-stage method for preparing metal matrix light-weighted composite material

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Embodiment Construction

[0023] In this embodiment, aluminum alloy is selected as the base metal, and SiC hollow spheres and Al mixed in any proportion are selected. 2 O 3 Hollow sphere 5, the diameter of the hollow sphere is 0.5mm-5mm, SiC hollow sphere and Al 2 O 3 The hollow sphere has high melting point and high hardness, and can be fully mixed with aluminum alloy without significantly reducing the compressive properties of the alloy material.

[0024] The mould used in the preparation method (see figure 2 ) consists of a pressure holding mold 1, a crucible 2, a resistance heating furnace 3, a macroporous porous ceramic or graphite plate 4, a vacuum chamber 6, a small porous ceramic or graphite plate 7 and a vacuum system 8. The preparation steps are: (1) pickling hollow spheres with a diameter of 0.5-5mm or heat treatment at 300-800 DEG C for 2-5h; (2) padding a commercially available 0.2mm-thick 10mm hole at the bottom of the casting mold The small-pore porous ceramic or graphite 7, and the...

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Abstract

The invention relates to a one-stage method for preparing a metal matrix light-weighted composite material. The invention uses the method of pressure maintaining percolation and vacuum suction casting to make molten metal immerse into the gaps among hollow spheres by penetrating through a porous ceramic plate or a graphite plate under the function of negative pressure, after the molten metal is cooled down after totally infiltration, and finally, the molten metal is demoulded and taken out, then a foamed metal matrix composite material including closed bubbles can be obtained. The hollow spheres are mixed hollow spheres of two or more than two kinds of Al2O3 hollow spheres, SiC hollow spheres, C hollow spheres or glazed hollow beads of different or same sizes. The porosity of the metal matrix composite material prepared by the method of the invention can reach more than 60% and the density can be obviously reduced, besides, the compression strength can be improved by 20-50% compared with the similar product, so that the high-strength and light-weighted matrix light-weighted composite material with various functions like damp shock absorption, sound insulation and noise reduction, energy absorption can be obtained. According to the one-stage method for preparing the metal matrix light-weighted composite material disclosed by the invention, the process is simple, the procedure is less and the applicable range to the varieties and sizes of the hollow sphere particles is wide, and nearly no selection to the matrix metal, the foam metal products of different densities can be prepared.

Description

technical field [0001] The present invention relates to a method for preparing a metal matrix lightweight composite material in one step. Specifically, one or more closed hollow sphere fillers of different sizes are used to prepare a metal matrix composite material with a foam structure. The material prepared by this method not only has excellent compressive properties, but also can significantly reduce the material density, thereby achieving the purpose of light weight. Background technique [0002] Metal matrix composite material is a composite material with metal or alloy as matrix and fiber, whisker, particle, etc. as reinforcement. Its mechanical properties are high transverse and shear strength, toughness and fatigue and other comprehensive properties. At the same time, it also has the advantages of thermal conductivity, electrical conductivity, wear resistance, small thermal expansion coefficient, good damping, no moisture absorption, no aging and no pollution, but i...

Claims

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Application Information

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IPC IPC(8): B22D18/06B22D19/14
CPCB22D18/06B22D19/14
Inventor 胡正飞张振蔡振武何大海蒋凯雁
Owner TONGJI UNIV
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