Method for rapidly preparing C/SIC ceramic composite material with pre-introduced matrix

A technology of ceramic composite materials and matrix materials, applied in the field of composite ceramic materials, can solve the problems of shortening production cycle, long preparation cycle, and reducing raw materials, and achieve the effects of shortening production cycle, reducing material cost, and reducing cost

Active Publication Date: 2016-11-16
湖北三江航天江北机械工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the defects of long preparation period and high cost in the existing C / SiC ceramic composite materials, and propose a method for rapidly preparing C / SiC ceramic composite materials with the matrix pre-introduced, compared with the traditional PIP process , this method achieves the purpose of reducing raw materials, shortening the production cycle, and reducing product costs by improving the weaving method of the braided body, adding molding, and pre-introducing the matrix.

Method used

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  • Method for rapidly preparing C/SIC ceramic composite material with pre-introduced matrix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for pre-introducing a matrix to prepare a C / SiC material 1, comprising the following steps:

[0035] 1) Braided body processing: the fabric adopts carbon cloth plus mesh tire puncture structure, carbon cloth and mesh tire are woven alternately, and 20g of SiC powder is evenly spread on each layer of mesh tire; the specific process parameters are as follows:

[0036] Table 1 Embodiment 1 fabric structure parameter table

[0037] project

skills requirement

Carbon cloth warp specifications

12K×1

Carbon cloth weft specification

12K×1

Carbon cloth warp density (root / 10cm)

80±2(mean value)

Carbon cloth weft yarn density (root / 10cm)

80±2(mean value)

Normal yarn specification

6K×1

Normal weft density (needle / 1cm)

2 stitches / 1cm

Normal warp density (pin / 1cm)

2 stitches / 1cm

Meridian volume content

16～18％

Weft volume content

16～18％

normal volume content

2～5...

Embodiment 2

[0046] A method for pre-introducing a matrix to prepare a C / SiC material 2, comprising the following steps:

[0047] 1) Braided body processing: The fabric adopts a carbon cloth plus mesh tire puncture structure, carbon cloth and mesh tires are woven alternately, and 30g of SiC powder is evenly spread on each layer of mesh tires. The specific process parameters are as follows:

[0048] Table 2 Example 2 fabric structure parameter table

[0049] project

skills requirement

Carbon cloth warp specifications

12K×1

Carbon cloth weft specification

12K×1

Carbon cloth warp density (root / 10cm)

80±2(mean value)

Carbon cloth weft yarn density (root / 10cm)

80±2(mean value)

Normal yarn specification

6K×1

Normal weft density (needle / 1cm)

2 stitches / 1cm

Normal warp density (pin / 1cm)

2 stitches / 1cm

Meridian volume content

16～18％

Weft volume content

16～18％

normal volume content

2...

Embodiment 3

[0058] A method for pre-introducing a matrix into a C / SiC material, comprising the following steps:

[0059] 1) Braided body processing: the fabric adopts a carbon cloth plus mesh tire puncture structure, carbon cloth and mesh tires are woven alternately, and 10g of SiC powder is evenly spread on each layer of mesh tires. The specific process parameters are as follows:

[0060] Table 3 embodiment 3 fabric structure parameter list

[0061]

[0062]

[0063] 2) Pretreatment of braided body Soak the braided body in step 1) in acetone solution for 2 hours, handle with care during the soaking process, and do not shake the container solution. Put the braided body into an oven at 120°C, keep warm for 6 hours and dry;

[0064] 3) Perform CVD pretreatment on the braided body in step 2): propylene is used as the carbon source gas, the flow rate is 40mL / min, nitrogen or argon is used as the dilution gas; the deposition reaction temperature is 900°C, the deposition pressure is 8KP...

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Abstract

The invention discloses a method for rapidly preparing a C / SIC ceramic composite material with a pre-introduced matrix, and relates to a ceramic matrix composite material and a preparing method thereof. According to the method, the structure of a fabric body is improved, mold pressing and matrix pre-introducing method are creatively provided, the period of the C / SIC ceramic composite material prepared with the PIP technology is greatly shortened, and therefore the aim that the preparing cost is reduced is achieved. The method includes the steps of fabric body processing, fabric body pretreating, precursor soaking, solidifying, mold pressing, high-temperature splitting, soaking, solidifying and splitting; after the increased mass is smaller than 1% of the raw mass, soaking and splitting are stopped, and material preparing is completed. According to the C / SIC ceramic composite material, on the premise that the production period is shortened by 30% to 50%, and the cost is reduced by 30% to 40%, the highest bending strength can reach 325 MPa, and the highest tensile strength can reach 180 MPa.

Description

technical field [0001] The invention relates to the technical field of composite ceramic materials, in particular to a method for rapidly preparing C / SiC ceramic composite materials by pre-introducing a matrix. Background technique [0002] C / SiC ceramic composites have the characteristics of high strength, high toughness, good corrosion resistance and low density at high temperature. In high temperature, high erosion and some harsh environments, especially in the leading edge of the sharpened wing of aerospace vehicles It has great potential for special parts on high-speed aircraft that need to withstand extremely high temperatures, anti-ablation, and anti-scouring conditions. As the main heat-resistant material, silicon carbide ceramic composite materials are widely used in aviation, aerospace and other fields. [0003] At present, the most common methods for preparing C / SiC composites are precursor impregnation pyrolysis (PIP) and chemical vapor infiltration (CVI), both ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/84C04B35/622C04B35/565
CPCC04B35/565C04B35/622C04B35/806C04B2235/483C04B2235/96
Inventor 丁庚陈海昆孙晓莉佘平江
Owner 湖北三江航天江北机械工程有限公司
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