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Preparation method of silicon carbide and silicon carbide composite material member

A composite material component and composite material technology, applied in the field of ceramic matrix composite materials, can solve the problems of long preparation cycle and high raw material price, and achieve the effects of less harm, improved densification efficiency, and strong process matching.

Active Publication Date: 2015-02-11
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Of course, the PIP method also has engineering application problems such as long preparation period and expensive raw materials.

Method used

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  • Preparation method of silicon carbide and silicon carbide composite material member
  • Preparation method of silicon carbide and silicon carbide composite material member
  • Preparation method of silicon carbide and silicon carbide composite material member

Examples

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preparation example Construction

[0021] A method for preparing a silicon carbide / silicon carbide composite component, the steps are:

[0022] 1) Preparation of silicon carbide fiber prefabricated body: the silicon carbide fiber prefabricated body is prepared by two-dimensional silicon carbide cloth layering or three-dimensional weaving process;

[0023] 2) Preparation of pyrolytic carbon interface layer by chemical vapor deposition method: methane, propane, propylene or acetylene gas is used as the deposition carbon source, the dilution gas is argon, and the silicon carbide fiber prefabricated body obtained in step 1) is placed in a carbon deposition furnace Deposition is carried out, and a pyrolytic carbon interface layer is deposited on the surface of the silicon carbide fiber; the process parameters are as follows: the deposition temperature is 850-1400°C, the deposition pressure is 0.1-20KPa, and the deposition time is 1-100 hours. The thickness of the pyrolytic carbon interface layer on the surface of th...

Embodiment 1

[0035] A method for preparing a silicon carbide / silicon carbide composite component, comprising the following steps:

[0036] 1) Using continuous silicon carbide fiber as raw material, it is first woven into plain weave, and then the arc-shaped prefabricated body is made with the aid of graphite tooling by sewing process;

[0037] 2) Using methane as the carbon source gas, the preform obtained in step 1) is placed in a deposition furnace for chemical vapor deposition, and a pyrolytic carbon interface layer is deposited on the surface of the silicon carbide fiber of the preform. The process conditions of the chemical vapor deposition are as follows: the deposition temperature is 900° C., the deposition pressure is 0.15 KPa, and the deposition time is 40 hours. The thickness of the interface layer of pyrolytic carbon is 0.17 μm;

[0038] 3) Using a vacuum-assisted method, the prepared impregnation phase was preheated to 60°C, and then introduced into the silicon carbide fiber pre...

Embodiment 2

[0042] A method for preparing a silicon carbide / silicon carbide composite component, comprising the following steps:

[0043] 1) Using continuous silicon carbide fiber as raw material, weave five pieces of satin cloth first, and then form a T-shaped prefabricated body in graphite tooling by two-dimensional layering;

[0044] 2) Using propane as the carbon source gas, the preform is placed in a deposition furnace for chemical vapor deposition, and a pyrolytic carbon interface layer is deposited on the surface of the silicon carbide fiber of the preform. The process conditions of the chemical vapor deposition are as follows: the deposition temperature is 1200° C., the deposition pressure is 1.0 KPa, and the deposition time is 20 hours. The thickness of the interface layer of pyrolytic carbon is about 0.15 μm;

[0045] 3) The prepared impregnated phase was introduced into the silicon carbide preform deposited with the pyrolytic carbon interface layer by means of vacuum assistanc...

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Abstract

The invention relates to a preparation method of silicon carbide and silicon carbide composite material member, especially relates to a preparation method of deformed silicon carbide and silicon carbide composite material member, and belongs to the technology field of ceramic matrix composite material. The impregnation phase and the precursor used in the preparation method not only comprise the solid PCS, but also comprise the liquid PCS, which is more cheap, so the technology matching property of the member is stronger, the densification efficiency of the member is improved to some degree, the cost is reduced and the preparation period of the member is shortened. The impregnation phase has little harm to the environment and the operators, and only a general type ventilation device is needed.

Description

technical field [0001] The invention relates to a preparation method of a silicon carbide / silicon carbide composite material component, in particular to a preparation method of a special-shaped silicon carbide / silicon carbide composite material component, and belongs to the technical field of ceramic matrix composite materials. Background technique [0002] As we all know, continuous fiber reinforced ceramic matrix composites have the characteristics of high temperature resistance, high hardness, corrosion resistance and high wear resistance of ceramic materials, and the reinforcement phase of continuous fibers can effectively improve the strength and toughness of composite materials. For silicon carbide / silicon carbide composite materials, since both the fiber and the matrix are silicon carbide, there will be no thermal mismatch between the two, and it has low density, high strength, good stiffness, and the material itself has high temperature resistance. Performance, espec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80
Inventor 李军平张国兵胡继东赵彦伟冯志海
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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