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Two-dimensional fiber cloth reinforced composite material and preparation method thereof

A technology of composite materials and fiber cloth, which is applied in the field of ceramic matrix composite materials and its preparation, can solve the problems of low interlayer shear strength, limited application range, and narrow application range, so as to shorten the preparation cycle, improve reliability, reduce The effect of preparation costs

Inactive Publication Date: 2008-07-23
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

1D CMC has high performance in the main direction of the fiber, but its strength away from the fiber axis is very low, so its application range is very narrow, and it is generally used in rotary bodies and special-shaped thin-walled structures
The reinforcement phase of 3DCMC is a continuous fiber three-dimensional fabric. 3D CMC has good structural integrity and good mechanical properties of the material. However, the shape of the three-dimensional fabric is limited by the weaving equipment and weaving technology. Not only the preparation cycle is long, but also the cost is high, which greatly limit its scope of application
2D CMC has good performance in the plane, and the preparation process is simple. Its prefabricated parts can easily learn from the mature molding process of resin-based composite materials such as hand lay-up and RTM. The cost is greatly reduced compared with 3D CMC, but the interlayer shear strength is low. , easy to delaminate, poor reliability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Two-dimensional fiber cloth reinforced composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] As shown in Figure 1, a two-dimensional carbon cloth puncture C / SiC composite material, the two-dimensional carbon fiber cloth b is used as a reinforcing phase, SiC micropowder is used as an inert filler, the matrix c is SiC material, and the two-dimensional carbon fiber cloth is punctured The fiber a (3k carbon fiber bundle) is punctured to form a whole, the puncture density is 3mm×3mm, and the puncture thickness is 5mm. The two-dimensional carbon cloth punctured C / SiC composite material is prepared through the following steps:

[0021] (1) Select polycarbosilane (PCS) as a precursor, use xylene and divinylbenzene as organic solvents, then dissolve 1000g of PCS (softening point 190°C) in 500g of divinylbenzene, and add 100g of Xylene, and then 400g of SiC micropowder (purity 99%, particle size 2 microns) was added to the mixed solution in 5 times, and ball milled to disperse for 24 hours to mix evenly to obtain impregnated slurry;

[0022] (2) Select 3k carbon fiber c...

Embodiment 2

[0033] A two-dimensional carbon cloth puncture C / SiC composite material, the raw materials used, the preparation method and the control conditions are the same as in Example 1, only the puncture density is adjusted from 3mm×3mm to 5mm×5mm, and the final 2D C / SiC composite The density of the material is 1.96g / cm3, and the interlaminar shear strength is 36.65MPa.

Embodiment 3

[0035] A two-dimensional carbon cloth piercing C / ZrB 2 -SiC composite material with two-dimensional carbon fiber cloth as reinforcement phase and ZrB 2 Micropowder (purity 99%, particle size 2 microns) is used as an inert filler, and SiC is used as a matrix. The two-dimensional carbon fiber cloth is connected as a whole through puncture fibers (3k carbon fiber bundles), and the puncture density is 3mm×3mm. The thickness of the puncture is 5.6mm. The two-dimensional carbon cloth punctures C / ZrB 2 -SiC composite material is prepared by the following steps:

[0036] (1) Select polycarbosilane (PCS) as a precursor, use xylene and divinylbenzene as organic solvents, then dissolve 1000g of PCS (softening point 190°C) in 500g of divinylbenzene, and add 100g of Xylene, then 725g of ZrB 2 Micropowder (purity 99%, particle size 2 microns) was added into the mixed solution in 5 times, ball milled and dispersed for 24 hours to mix evenly to obtain impregnated slurry;

[0037] (2) Thi...

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Abstract

The invention discloses a two-dimensional fiber cloth reinforced ceramics based composite material and the preparation technique, which adopts the two-dimensional fiber cloth as the reinforcing phase and the ceramic powder or the refractory metal powder as the stuffing, and the carbon and the carborundum as the base. The process steps are following: first the sizing agent with different ceramic powder and metal powder is coated on the two-dimensional fiber cloth, and then overlapping, puncturing and repeated densification are carried out. The preparation method has the advantages of lowering preparation cost and shortening preparation cycle, and the two-dimensional fiber cloth reinforced ceramics based composite material has the advantages of high shear strength between layers, structural stability and high reliability. The types of fiber cloth and the base can be adjusted and optimized in a wider range according to the applications, so as to be applicable for different fields.

Description

technical field [0001] The invention relates to a ceramic matrix composite material and a preparation process thereof, in particular to a two-dimensional fiber cloth reinforced ceramic matrix composite material and a preparation process thereof. Background technique [0002] The existing ceramic matrix composites (Ceramic Matrix Composites, CMC) fully combine the advantages of continuous fibers (carbon fibers, silicon carbide fibers, quartz fibers, etc.) Ablation, erosion resistance, high hardness and high wear resistance and other advantages. At present, CMC represented by C / SiC composite materials has broad application prospects in aerospace, energy technology, chemical industry, transportation industry and other fields. The reinforcement methods of CMC mainly include three types: unidirectional fiber reinforcement (1D), two-way fabric reinforcement (2D) and three-dimensional fabric reinforcement (3D). Big difference. The fiber in 1D CMC maintains a continuous filament ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): C04B35/80C04B35/622C04B35/52C04B35/565C04B35/583C04B35/584C04B35/01
Inventor 胡海峰王其坤张长瑞张玉娣王军
Owner NAT UNIV OF DEFENSE TECH
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