Sandwich structure composite material and preparation method thereof

A composite material and sandwich technology, applied in the field of sandwich structure composite material and its preparation, can solve the problems of poor bending resistance, poor tensile performance, low strength, etc. Performance and impact resistance, effect of high specific strength

Inactive Publication Date: 2019-08-30
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the current metal matrix composites mixed with hollow spheres have poor bending resistance and poor tensile performance, and their strength is low under the action of radial tension.

Method used

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  • Sandwich structure composite material and preparation method thereof
  • Sandwich structure composite material and preparation method thereof
  • Sandwich structure composite material and preparation method thereof

Examples

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preparation example Construction

[0029] The invention provides a preparation method of a sandwich composite material. The structure of the sandwich composite see Figure 1-2 , specifically including a first surface layer 1, a second surface layer 2, and a sandwich layer 3 between the first surface layer 1 and the second surface layer 2; the first surface layer 1 and the second surface layer The two surface layers 1 are carbon fiber woven cloth; the sandwich layer 3 includes a matrix 31 and aluminum oxide hollow balls 32 distributed in the matrix 31; the matrix 31 is aluminum or aluminum alloy.

[0030] The preparation method of the above-mentioned sandwich composite material comprises the following steps:

[0031] S1. Provide prefabricated molds.

[0032] For prefabricated structures, see image 3 shown. exist image 3 In , the downward triangle represents the liquid inlet, and the upward triangle represents the gas outlet. Of course, it can be understood that the specific structure of the prefabricated...

Embodiment 1

[0055] Supplied prefabricated.

[0056] Aluminum oxide hollow spheres (diameter 3mm, wall thickness 105μm, nominal density 0.52g / cm 3 , the true density is 0.87g / cm 3 ), and the carbon fiber woven cloth of the first surface layer and the second surface layer (single layer, see Figure 4 ) into the prefabricated mold, and the aluminum oxide hollow spheres are evenly distributed, and two layers of carbon fiber woven cloth are located on both sides of the aluminum oxide hollow sphere stack.

[0057] Put the prefabricated mold into an infiltration furnace for preheating, and heat it to 575° C., and keep it warm for 1 hour.

[0058] Add the melted A356 aluminum alloy melt into the prefabricated mold in the infiltration furnace from the liquid inlet, and apply a pressure of 35MPa to the pressure head at the same time; keep the temperature at 575°C, keep the pressure, and the temperature in the furnace, heat and maintain pressure 1 hour.

[0059] Finally, unmould after cooling. ...

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Abstract

The invention discloses a preparation method of a sandwich structure composite material. The method comprises the following steps that a prefabricating die is provided; an aluminum oxide hollow ball and two pieces of carbon fiber woven cloth are placed into designated positions in the prefabricating die and preheated; melted aluminum base melt liquid is poured into the preheated prefabricating die, pressurizing and heat preserving are carried out, and thus the melted aluminum base melt liquid fills the space between the two pieces of carbon fiber woven cloth; and die releasing is carried out after cooling. According to the preparation method, pressurizing permeation and high-temperature permeation are adopted at the same time, after the aluminum base melt liquid enters the prefabricating die, the good mobility can be kept, the aluminum base melt liquid is fully attached to the aluminum oxide hollow ball, meanwhile, the aluminum base melt liquid can enter the two pieces of carbon fiberwoven cloth better, and thus the good combination can be formed between an interlayer and the first face layer as well as between the interlayer and the second face layer. Meanwhile, it is ensured that only a few or no air holes exist in the formed composite material, and the performance of the composite material is better. The invention further provides a sandwich structure composite material.

Description

technical field [0001] The invention belongs to the technical field of sandwich structure composite materials, and relates to a sandwich structure composite material and a preparation method thereof. Background technique [0002] A metal matrix composite is a composite material that uses a metal or its alloy as a matrix and hollow spheres as a reinforcement. Such materials generally have low density, high specific strength, and excellent energy-absorbing performance. There is a stress plateau period in their compressive stress-strain curves, and they can effectively absorb external impact energy through large plastic deformation and their own deformation. [0003] However, the current metal matrix composites mixed with hollow spheres have poor bending resistance and poor tensile performance, and their strength is low under the action of radial tension. Contents of the invention [0004] Based on this, it is necessary to provide a method for preparing a sandwich structure ...

Claims

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Application Information

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IPC IPC(8): C22C47/06C22C47/12C22C49/06C22C49/14C22C101/10
CPCC22C47/06C22C47/12C22C49/06C22C49/14
Inventor 项重辰张庆宇丁汉林
Owner SUZHOU UNIV
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