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A near-net-shape method for 3D braided fiber-reinforced metal matrix composites

A technology of weaving fibers and composite materials, applied in the field of near-net shape, which can solve the problems affecting the shape structure, dimensional accuracy and mechanical properties of composite materials, the local structural shape is easily deformed, and it is difficult to ensure the shape and size, etc., to achieve excellent mechanical properties , Reduce the effect of poor dimensional accuracy and high dimensional accuracy

Inactive Publication Date: 2020-09-25
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one of the difficulties in vacuum pressure infiltration forming of this kind of composite materials is that due to the differences in the 3D weaving structure and weaving parameters of the fiber preforms, the 3D weaving fiber preforms with different volume fractions and different structural shapes, the The shape of the local structure is easy to deform, and the size will shrink, especially the thin-layer special-shaped structure and the structure with variable cross-section size are more difficult to ensure its shape and size, thus affecting the shape structure, dimensional accuracy and mechanical properties of composite materials

Method used

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  • A near-net-shape method for 3D braided fiber-reinforced metal matrix composites
  • A near-net-shape method for 3D braided fiber-reinforced metal matrix composites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A near-net-shaping method of a carbon fiber reinforced aluminum matrix composite material with a 3D orthogonal braided structure, the preparation steps of which are as follows:

[0029] A, prepare the shaping mold that is used for 3D orthogonal weaving carbon fiber prefabricated body first;

[0030] B. Carry out 3D orthogonal weaving of the carbon fiber prefabricated body with a volume fraction of 45%. After the carbon fiber weaving is completed, immerse the carbon fiber prefabricated body of the 3D orthogonal weaving structure in the alcohol-soluble phenolic varnish as a whole, take it out and drain after fully infiltrating; After the alcohol-soluble phenolic varnish is completely dried and cured, the shaping mold for fiber 3D weaving is removed to obtain a carbon fiber prefabricated body with a shaped 3D orthogonal weaving structure;

[0031] C. After the impregnated graphite mold is mechanically formed, bake it at 300°C for 30 minutes, and clean it with acetone after...

Embodiment 2

[0038] A near-net-shaping method of a carbon fiber reinforced magnesium-based composite material with a 3D five-way braided structure, the preparation steps of which are as follows:

[0039] A. Prepare a shaping mold for the 3D five-directional carbon fiber prefabricated body first;

[0040] B. Carry out 3D weaving of 3D five-way carbon fiber prefabricated body with a volume fraction of 50%. After the carbon fiber weaving is completed, spray the prepared nitro paint directly on the 3D five-directional carbon fiber prefabricated body; after the nitro paint is completely dry and solidified , disassemble the shaping mold for fiber 3D weaving, that is, obtain a carbon fiber prefabricated body with a 3D five-way weaving structure;

[0041] C. After the impregnated graphite mold is mechanically formed, it is baked at 500°C for 60 minutes, and cleaned with acetone after cooling to room temperature;

[0042] D. Then, embed and fix the prefabricated carbon fiber prefabricated 3D five-...

Embodiment 3

[0048] A near-net-shape method for a silicon carbide (SiC) fiber-reinforced aluminum matrix composite material with a 3D orthogonal braided structure, the preparation steps of which are as follows:

[0049] A, first prepare the shaping mold for 3D braided SiC fiber prefabricated body;

[0050] B. Carry out 3D orthogonal weaving of the SiC fiber preform with a volume fraction of 50%. After the SiC fiber weaving is completed, immerse the SiC fiber preform of the 3D orthogonal weave structure in the aluminum dihydrogen phosphate solution, and take it out after fully soaking Drain and heat to 400°C; after the aluminum dihydrogen phosphate solution is completely cooled and solidified, disassemble the shaping mold for fiber 3D weaving to obtain a SiC fiber preform with a shaped 3D orthogonal weaving structure;

[0051] C. After the impregnated graphite mold is mechanically formed, it is baked at 600°C for 40 minutes, and cleaned with ethanol after cooling to room temperature;

[00...

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Abstract

The invention discloses a near-net forming method of the 3D braided fiber reinforced metal-based composite material, and belongs to the technical field of advanced composite materials. The method is characterized in that a vacuum air pressure infiltration preparation technology based on a liquid binder is adopted to assist in accurately controlling the shape and the size of a 3D braided fiber preform structure; in the 3D weaving process of the fiber preform, a liquid binder is adopted to accurately fix and shape the 3D braided fiber preform, then the size precision of the 3D braided fiber reinforced metal-based composite material is accurately controlled through the impregnated graphite mold of the embedded fiber preform, and deformation and local fiber polarization of the 3D braided fiberpreform in the infiltration process are prevented. The prepared 3D braided fiber reinforced metal-based composite material has high dimensional accuracy and excellent mechanical properties, the near-net forming of the 3D braided fiber reinforced metal-based composite material is realized, batch industrial production can be realized, the near-net forming method has a wide application prospect in the fields of aerospace, national defense, military and the like.

Description

technical field [0001] The invention relates to the field of high-performance metal-matrix composite materials with complex structures, in particular to a near-net-shaping method for 3D braided fiber-reinforced metal-matrix composite materials. Background technique [0002] Three-dimensional (3D) braided fiber-reinforced metal matrix composites have the advantages of high specific stiffness and specific strength, corrosion resistance, excellent temperature resistance, impact resistance and damage resistance, while the 3D braided structure avoids the traditional unidirectional composite The anisotropy of materials and the problems of easy cracking and delamination of two-dimensional composite materials, low interlaminar shear strength, and poor impact resistance are one of the structural materials with the most development potential in cutting-edge engineering and technology fields such as aviation, aerospace, and national defense. [0003] At present, the preparation methods...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/06C22C47/08
CPCC22C47/066C22C47/08
Inventor 徐志锋单嘉立余欢王振军蔡长春张守银汪志太卢百平杨伟熊博文梁祥
Owner NANCHANG HANGKONG UNIVERSITY
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