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Preparation method for three-dimensional woven fiber reinforced ceramic matrix composite

A technology of structural fibers and composite materials, applied in the field of preparation of ceramic matrix composite materials, can solve the problems of small molecule overflow, low interlaminar shear strength, long preparation period, etc., to increase the interlaminar shear strength, facilitate large-scale Production, the effect of reducing delamination

Inactive Publication Date: 2010-11-10
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In unidirectional fiber-reinforced CMC, continuous filament fibers are formed by winding or laying up. The material has high performance along the fiber axis, but the strength away from the fiber axis is very low, and the anisotropy of the material is obvious.
Two-dimensional fabric reinforced CMC is formed by lamination molding, which has good performance in the plane, but the interlayer shear strength is low and it is easy to delaminate
For the reinforcement method of three-dimensional fabrics, Xie Zhengfang (Xie Zhengfang, Xiao Jiayu. Preparation of carbon fiber three-dimensional braids reinforced alumina matrix composites by sol-gel method. Journal of National University of Defense Technology, 1998, 20[5]: 15), Zheng Wenwei (Zheng Wenwei et al. Preparation process and performance characterization of three-dimensional overall braided ceramic matrix composites. Journal of Composite Materials. 1997, 14(1): 48-53) and others studied the preparation process of three-dimensional braided ceramic matrix composites and performance characterization, but there are relatively few studies on 3D woven ceramic matrix composites
Three-dimensional fabric-reinforced CMC has good mechanical properties and structural integrity, and is the most ideal reinforced structure, but its application range is limited due to complex manufacturing process, long preparation cycle and high production cost.
The CVD / CVI method produces ceramics by reaction and deposits them in the fiber voids to form a matrix, but its outstanding problems are that the equipment is complex, the preparation cycle is long, the residual porosity of the composite material is high, and the types of applicable ceramic matrix are limited.
The PIP method converts the organic precursor into an inorganic ceramic matrix by cracking at high temperature, but small molecules overflow during the cracking process, making it difficult to prepare fully dense materials

Method used

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  • Preparation method for three-dimensional woven fiber reinforced ceramic matrix composite
  • Preparation method for three-dimensional woven fiber reinforced ceramic matrix composite
  • Preparation method for three-dimensional woven fiber reinforced ceramic matrix composite

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A three-dimensional woven structure carbon fiber reinforced silica ceramic matrix composite material can be obtained by the following method:

[0037] (1) Weigh 400g fused silica powder, prepare slurry by deionized water and powder mass ratio of 2:3, add 1.5vol.% binder carboxymethylcellulose (CMC) and dispersant isopropanol at the same time ; Put it into a ball mill with a ball-to-material ratio of 2:3 for ball milling for 3 hours, the grinding medium is agate balls, and the obtained kinematic viscosity is 120mm 2 / s silica ceramic slurry.

[0038](2) Choose carbon fiber with a specification of 3K to weave a three-dimensional woven structure carbon fiber reinforced silica ceramic prefabricated part consisting of 3 layers of warp yarn and 4 layers of weft yarn, with a warp density of 5 threads / cm and a weft density of 5 threads / cm. Before each weft insertion, the silica ceramic slurry is fully filled in the gap between the yarns by coating and pouring methods, and a "g...

Embodiment 2

[0043] A three-dimensional woven structure carbon fiber reinforced alumina ceramic matrix composite material can be obtained by the following method:

[0044] (1) Weigh 360g of alumina powder, prepare slurry by deionized water and powder mass ratio of 2:3, add 1.5vol.% binder carboxymethylcellulose (CMC) and dispersant isopropanol at the same time ; put into a ball milling tank with a ball-to-material ratio of 2:3 for ball milling for 3 hours, the grinding medium is agate balls, and the obtained kinematic viscosity is 100mm 2 / s alumina ceramic slurry.

[0045] (2) Choose carbon fiber with a specification of 3K to weave a three-dimensional woven structure carbon fiber reinforced alumina ceramic prefabricated part consisting of 3 layers of warp yarn and 4 layers of weft yarn, with a warp density of 5 threads / cm and a weft density of 5 threads / cm. Before each weft insertion, the alumina ceramic slurry is fully filled in the gap between the yarns by coating and pouring methods, ...

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Abstract

The invention relates to a preparation method for a three-dimensional woven fiber reinforced ceramic matrix composite. The preparation method comprises the following steps: (1), adding ceramic powder into deionized water, adding binder and dispersing agent, stirring and carrying out ball-milling to obtain slurry; (2), after finishing the drawing-in and tying-in process, utilizing the slurry to carry out pretreatment on fiber yarns, carrying out weft insertion, inserting a gap reserving tube at a shed part along the warp yarn, weft yarn or binding yarn direction of textile, battening, changingheald, winding, finishing weaving one weft, obtaining a prefabricated member, and drying; (3) drawing out the gap reserving tube in the dried prefabricated member, utilizing a vacuum-assisted resin transfer method (VARTM) to infiltrate the prefabricated member with the slurry, drying, and then carrying out the VARTM process for 3-4 times; and (4) carrying out hot pressed sintering. The preparation method of the invention is simple and has wide application range, short production period, high production efficiency and low production cost; and the obtained composite has the advantages of high three-dimensional woven structural interlamination shear degree, good integrity and high reliability.

Description

technical field [0001] The invention belongs to the field of preparation of ceramic matrix composite materials, in particular to a preparation method of a three-dimensional woven structure fiber reinforced ceramic matrix composite material. Background technique [0002] Ceramic materials have high strength, high hardness, corrosion resistance and excellent high temperature resistance, and are widely used in high-performance structural materials. Among them, continuous fiber reinforced ceramic matrix composites (Continuous Fiber Reinforced Ceramic Matrix Composites, referred to as CFRCMC) has much higher fracture toughness and dimensional stability of single-phase ceramics, effectively overcomes the sensitivity to cracks and thermal shocks, and also has high The advantages of specific strength, high specific modulus, wear resistance, and good thermal stability have shown great advantages in the fields of thermal protection for repeated use in aerospace, energy, and chemical i...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/622
Inventor 高天琪周国红郑轶文韩阳张坤王士维邱夷平
Owner DONGHUA UNIV
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