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High-density flat carbon fiber gradient stitching preform and preparation method thereof

A technology of carbon fiber and prefabricated body, which is applied in the field of high-rise dense flat carbon fiber gradient stitched prefabricated body and preparation, which can solve the problems of high porosity, low retention rate of mechanical properties and frequent processing of carbon/carbon composite materials, and achieve high utilization rate of fiber strength , Solve the effect of poor accuracy of structural parameters and improvement of densification efficiency

Active Publication Date: 2022-04-29
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above problems, the present invention adopts flat carbon fiber bundles and weaves them into light and thin single-layer flat carbon fiber planar prefabricated bodies, which are then realized by gradient lamination and seaming Preparation of flat carbon fiber gradient stitched preforms to meet the requirements of high density, high load, strong interlayer and low seam damage, and completely solve the following carbon / carbon composite materials with high porosity, high cost, long cycle, frequent processing and mechanical property retention low rate problem

Method used

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  • High-density flat carbon fiber gradient stitching preform and preparation method thereof
  • High-density flat carbon fiber gradient stitching preform and preparation method thereof
  • High-density flat carbon fiber gradient stitching preform and preparation method thereof

Examples

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Embodiment 1

[0042] A high-rise dense flat carbon fiber gradient stitched prefabricated body, the length of which is 300mm, the width is 300mm, the thickness is 6mm, the number of layers is 50, and the adjustable range of gradient pores in the thickness direction is 100%;

[0043] A method for preparing a high-density flat carbon fiber gradient stitching prefabricated body, comprising the following steps:

[0044] (1) The carbon fiber T700-12K is processed by a mechanical stretching process to obtain a 20mm wide flat carbon fiber bundle; after that, a 20mm wide flat carbon fiber bundle is used according to the warp and weft yarns, and the pores of the adjacent warp yarns and adjacent weft yarns are 0.1 and 0.12 respectively , 0.14, 0.16, 0.18mm, weaving plain fabric, surface density is 60g / cm 2 -70g / cm 2 , obtained the single-layer flat carbon fiber planar prefabricated body (structure such as figure 1 );

[0045] (2) Lay 10 layers of single-layer flat carbon fiber planar prefabricated ...

Embodiment 2

[0051] A high-rise dense flat carbon fiber gradient stitched prefabricated body, the length of which is 500mm, the width is 500mm, the thickness is 6mm, the number of layers is 60, and the adjustable range of gradient pores in the thickness direction is 100%;

[0052] A method for preparing a high-density flat carbon fiber gradient stitching prefabricated body, comprising the following steps:

[0053] (1) The carbon fiber T700-12K is processed by a mechanical stretching process to obtain a 23mm wide flat carbon fiber bundle; after that, 23mm wide flat carbon fiber bundles are used according to the warp and weft yarns, and the pores of the adjacent warp yarns and adjacent weft yarns are 0.1 and 0.12 respectively , 0.14, 0.16, 0.18mm, weaving plain fabric, surface density is 45g / cm 2 -55g / cm 2 , obtained the single-layer flat carbon fiber planar prefabricated body;

[0054] (2) Spread 12 layers of single-layer flat carbon fiber planar prefabricated bodies with pores of 0.1 mm ...

Embodiment 3

[0058] A high-rise dense flat carbon fiber gradient stitched prefabricated body, the length of which is 300mm, the width is 300mm, the thickness is 7mm, the number of layers is 50, and the adjustable range of gradient pores in the thickness direction is 100%;

[0059] A method for preparing a high-density flat carbon fiber gradient stitching prefabricated body, comprising the following steps:

[0060] (1) The carbon fiber T700-12K is processed by the mechanical widening process to obtain 10, 12, 14, 16, 18mm wide flat carbon fiber bundles; after that, the yarns used in the warp and weft are the same, all using 10, 12, 14, 16, 18mm wide flat carbon fiber bundles, according to the adjacent warp and adjacent weft pores are 0.4, 0.35, 0.3, 0.25, 0.2mm, weave plain weave fabric, surface density is 60g / cm 2 -100g / cm 2 , obtained the single-layer flat carbon fiber planar prefabricated body;

[0061] (2) Lay 10 layers of single-layer flat carbon fiber plane preforms with pores of 0....

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Abstract

The invention discloses a high-density flat carbon fiber gradient stitching preform and a preparation method thereof, and belongs to the field of equipment materials. According to the method, the flat carbon fiber bundles are adopted and woven into the light and thin single-layer flat carbon fiber plane prefabricated body, and then the flat carbon fiber gradient stitching prefabricated body is prepared through gradient lamination and stitching, so that the requirements of high layer density, high bearing capacity, strong interlayer and low stitching damage are met; and the problems of high porosity, high cost, long period, frequent processing and low mechanical property retention rate of the subsequent carbon / carbon composite material are thoroughly solved.

Description

technical field [0001] The invention relates to a high-layer dense flat carbon fiber gradient suture prefabricated body and a preparation method, belonging to the field of equipment materials. Background technique [0002] Realizing the structure densification and load-bearing performance of carbon fiber-reinforced carbon-based (carbon / carbon) composite materials is an important technical direction to improve the integration characteristics of thermal load-bearing composite materials for aerospace equipment. Among them, the microporous structure design and construction of the continuous carbon fiber preform play a crucial role. [0003] At present, limited by the weaving process, most of the preforms used for carbon / carbon composites have a uniform structure, uniform parameters and uniform pores, mainly including three-dimensional weaving, three-dimensional corner interlocking, three-dimensional orthogonal, fine weaving puncture, needle felt Wait. Generally, the chemical v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B11/12B32B9/00B32B9/04D03D15/20D03D15/46D03D13/00D05B35/00
CPCB29B11/12B32B5/02B32B5/26D03D15/20D03D15/46D03D13/00D05B35/00B32B2262/106
Inventor 张典堂杨莹雪刘晓东钱坤
Owner JIANGNAN UNIV
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