A kind of skin forming method of graphene wave-absorbing composite material

A composite material and molding method technology, applied in the field of aerospace material manufacturing, can solve the problems of application, no liquid molding technology, less wave absorbing skin, etc., to improve the wave absorbing strength, improve the interface bonding performance, molding processability and The effect of improving the absorbing performance

Active Publication Date: 2022-01-25
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with a large number of researches on the technology of honeycomb sandwich absorbing composite materials, there are few technical researches on the absorbing skin, and there is no report on the application of liquid forming technology to the manufacture of such parts, so this research is of great significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The present embodiment provides a method for forming a graphene wave-absorbing composite material skin, comprising the following steps:

[0038] (1) Graphene laminate preparation: flatly lay the cut graphene single-layer film on the viscous toughened resin film, and after one side is covered, also lay on the other side of the graphene film Resin film of the same material. After the coating is completed, keep the backing paper on both sides of the resin film, and cut them into corresponding sizes for future use.

[0039] (2) Lay-up of skin preforms: The graphene laminates and the carbon fiber preforms are alternately laminated. After the lamination is completed, vacuum bags are used to seal the bags, and then heat and pre-compact after vacuuming. After the above steps are completed, the quartz fiber preform and the toughened resin film used above are alternately laid on the surface of one side of the preform to form a wave-transmitting layer. After completing the above...

Embodiment 2

[0043] On the basis of the above-mentioned embodiment, this embodiment further defines that in the step (1), the specific process of preparing the graphene laminate with layability is as follows:

[0044] (1.1) Take a graphene single-layer film with a suitable thickness and cut it into a suitable size;

[0045] (1.2) At room temperature, lay it flat on the viscous toughened resin film;

[0046] (1.3) After the coating is completed, a viscous toughened resin film of the same material is also laid on the other side of the graphene film;

[0047] (1.4) After the laying is completed, keep the backing paper on both sides of the resin film to obtain a layable graphene laminate. The other parts of this embodiment are the same as the above-mentioned embodiments, and are not repeated here.

Embodiment 3

[0049] On the basis of the above-mentioned embodiments, this embodiment further defines that in the step (1.1), the thickness of the obtained graphene single-layer film is 0.1 mm, and it is cut into a 1000*1000 mm cube film. The other parts of this embodiment are the same as the above-mentioned embodiments, and are not repeated here.

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PUM

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Abstract

The invention discloses a method for forming a skin of a graphene wave-absorbing composite material, which comprises the following steps: 1) preparing a graphene laminate with paveability; 2) utilizing several layers of alternately laminated graphene laminates and carbon fiber prefabricated body to prepare skin prefabricated body; 3) Use highly conductive carbon nano-graphene fibers as sutures to perform two-dimensional suture on skin prefabricated body to obtain fiber prefabricated body; 4) process fiber prefabricated body by using RFI liquid forming process body to obtain a graphene absorbing composite material skin. The invention uses large-size graphene materials as raw materials, innovatively combines the existing composite material prefabricated body forming technology and resin melt infiltration (RFI) liquid forming method. The method is cutting-edge, operable and practical, and is suitable for wide application.

Description

technical field [0001] The invention relates to the technical field of aviation material manufacturing, in particular to a method for forming the skin of a graphene wave-absorbing composite material. Background technique [0002] Vigorously developing lightweight, broadband radar stealth absorbing materials has always been an important issue in aerospace manufacturing technology. Its basic working principle is to confine the incident electromagnetic wave inside the material through the electromagnetic parameter adjustment design of the material, and convert the electromagnetic energy into heat energy and other forms of loss through various loss mechanisms. Aerospace absorbing materials can usually be divided into coating materials and structural materials. Early absorbing materials were mainly absorbing coating materials, and their effective absorbing components were metal ferrites. Such materials have disadvantages such as high density, easy to fall off, and poor resistanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/34B29C70/44B29C70/54
CPCB29C70/342B29C70/443B29C70/54B29C70/542B29C70/543
Inventor 邬祚强何凯罗维杨龙英
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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