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Preparation method of three-dimensional woven carbon fiber-reinforced magnesium-based composite material

A technology of three-dimensional weaving and composite materials, which is applied in the field of preparation of functional composite materials, can solve problems such as complicated process, unsuitable for industrial production, and reduced fiber performance, so as to promote the impregnation process, make the preparation method simple and easy, and improve wettability Effect

Inactive Publication Date: 2012-03-14
常熟市星源金属涂层厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the added alloying elements are usually enriched on the surface of the fiber and react with the fiber interface, reducing the performance of the fiber
The most commonly used and effective method to solve the wettability problem is carbon fiber surface coating treatment, and the use of suitable coating and coating treatment methods is the key to solve the wettability problem. A copper-plated graphite process has been disclosed in the prior art Reinforced magnesium-based composites, but the process is complex and not suitable for industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] A method for preparing a three-dimensional braided carbon fiber reinforced magnesium-based composite material, the preparation steps of which are:

[0019] (1) First remove the organic adhesive layer on the surface of the three-dimensional woven carbon fiber;

[0020] (2) A layer of silica coating is applied on the surface of the three-dimensional woven carbon fiber by the sol-gel method, and the thickness of the silica coating is greater than 0.2 microns;

[0021] (3) Composite of three-dimensional braided carbon fiber with silica coating on the surface and magnesium alloy matrix: after preparing the three-dimensional braided carbon fiber coated with silica coating on the surface, the powder metallurgy method can be used to prepare the three-dimensional braided carbon fiber reinforcement Magnesium-based composites.

[0022] Wherein, the method for removing the organic adhesive layer on the surface of the three-dimensional woven carbon fiber described in step (1) is: s...

Embodiment 1

[0030] (1) Soak the three-dimensional woven carbon fiber in acetone for 5 hours to remove the glue;

[0031] (2) Then prepare silica sol: Dissolve ethyl orthosilicate in ethanol, slowly add deionized water in proportion, add hydrolysis catalyst concentrated hydrochloric acid to adjust PH2-3, and add appropriate amount of glycerin for drying control Chemical additives, maintain a constant temperature of 60°C, and vigorously stir for 0.5 hours to hydrolyze ethyl orthosilicate under acidic conditions to obtain silica sol, wherein the moles of ethyl orthosilicate, hydrochloric acid, ethanol, and glycerin The ratio is 1:0.5:1.5:0.8; then use the sol-gel method to coat a layer of silica coating on the surface of the three-dimensional woven carbon fiber, the thickness of the silica coating is 0.3 microns: roughen with 50% nitric acid Carbon fiber surface, then impregnate the fiber braided body in the prepared silica sol, impregnate for 1 hour under vacuum conditions, then take it out...

Embodiment 2

[0034] (1) Soak the three-dimensional woven carbon fiber in acetone for 10 hours to remove the glue;

[0035](2) Then prepare silica sol: Dissolve ethyl orthosilicate in ethanol, slowly add deionized water in proportion, add hydrolysis catalyst concentrated hydrochloric acid to adjust PH2-3, and add appropriate amount of glycerin for drying control Chemical additives, keep a constant temperature of 60°C, and stir vigorously for 1 hour to hydrolyze ethyl orthosilicate under acidic conditions to obtain silica sol, wherein the molar ratio of ethyl orthosilicate, hydrochloric acid, ethanol, and glycerol 1: 0.5: 1.5: 0.8; then use the sol-gel method to coat a layer of silica coating on the surface of the three-dimensional woven carbon fiber, the thickness of the silica coating is 0.4 microns: use 50% nitric acid to roughen the surface of the carbon fiber , then impregnating the fiber braided body in the prepared silica sol, impregnating for 2 hours under vacuum conditions, then tak...

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Abstract

The invention relates to a preparation method of a three-dimensional woven carbon fiber-reinforced magnesium-based composite material. The method comprises the following steps of: (1) removing an organic adhesive layer from the surface of three-dimensional woven carbon fiber; (2) coating a layer of silicon dioxide coating on the surface of the three-dimensional woven carbon fiber with a sol-gel method, wherein the thickness of the silicon dioxide coating is greater than 0.2 micro; and (3) preparing the prepared three-dimensional woven carbon fiber coated with the silicon dioxide coating on the surface into the three-dimensional woven carbon fiber-reinforced magnesium-based composite material with a powder metallurgy method. The three-dimensional woven carbon fiber-reinforced magnesium-based composite material prepared with the method has low density, high specific strength, high plasticity, high toughness and high processing performance; and moreover, the preparation method is simple and practical, has low cost, and can be widely applied to the fields of aerospace, nuclear industry, military equipment, various transport facilities, heavy industry, mechanical industry, light industry and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of functional composite materials, in particular to a preparation method of a three-dimensional braided carbon fiber reinforced magnesium-based composite material. Background technique [0002] Resource conservation and environmental friendliness are the main development trends of the current industrial society. The research and development of lightweight, high-performance, recyclable and energy-saving materials is increasingly attracting widespread attention. Magnesium-based lightweight alloys have the characteristics of low density, high specific strength, high specific stiffness, and recyclability. It is one of the research hotspots in recent years. With the increasingly higher requirements for the high-temperature performance of light metals, a single alloy material can no longer meet the demand, and the research perspective has gradually turned to composite materials. Carbon fiber has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/04C22C47/14C22C49/04C22C49/14C22C101/10C22C121/02
Inventor 顾丹
Owner 常熟市星源金属涂层厂
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