Heat transmission ceramic matrix composite material and preparation method thereof

A composite material and ceramic-based technology, which is applied in the field of preparation of thermally conductive ceramic-based composite materials, can solve the problems that the application effect of domestic high thermal conductivity carbon fiber has yet to be evaluated, and the research on high thermal conductivity carbon fiber toughened composite materials lags behind and starts late. Improve high temperature anti-oxidation and ablation performance, good mechanical properties and weavable performance, and improve thermal conductivity

Active Publication Date: 2019-02-12
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country started late in the preparation of key raw materials, and the engineering application effect of domestic high thermal conductivity carbon fiber has yet to be evaluated
In addition, because the performance and batch production capacity of high thermal conductivity carbon fiber have not yet broken through, the research on high thermal conductivity carbon fiber toughened composite materials is relatively lagging behind.

Method used

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  • Heat transmission ceramic matrix composite material and preparation method thereof
  • Heat transmission ceramic matrix composite material and preparation method thereof
  • Heat transmission ceramic matrix composite material and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0040] The invention provides a method for preparing a thermally conductive ceramic matrix composite material, such as figure 1 shown, including the following steps:

[0041] (1) Preparation of carbon fiber preform

[0042] The carbon fiber prefabricated body is woven by mixing mesophase pitch-based high thermal conductivity carbon fiber and polyacrylonitrile-based carbon fiber.

[0043] The mesophase high thermal conductivity carbon fibers used in this step can be selected from domestic or imported materials, and can also be prepared according to existing preparation methods (for example, using a preparation method comprising the following preparation steps: mesophase pitch synthesis, porous continuous melt spinning, Fiber continuous non-melting treatment, low / high temperature carbonization and graphitization treatment).

[0044] Due to the high tensile modulus of mesophase pitch-based high thermal conductivity carbon fibers, it is difficult to meet the requirements for mec...

Embodiment 1

[0078] (1) Preparation of carbon fiber preform

[0079] Mitsubishi Chemical K13D2U pitch-based high thermal conductivity carbon fiber is used for mixed weaving with Japan's Toray and Toho T300 traditional polyacrylonitrile-based carbon fiber. The weaving method is a three-way orthogonal method, and mesophase pitch-based high thermal conductivity carbon fiber is used in the flow direction. Carry out weaving, see Table 1 for other weaving requirements, and weave according to fabric number 1 in Table 1 to obtain a carbon fiber prefabricated body. The fiber volume content and XY ratio of the fiber preform are shown in Table 1.

[0080] (2) Preparation of C / C body

[0081] Put the carbon fiber prefabricated body into the CVI-C furnace, the carbon source gas is propane, the carrier gas is argon, the deposition temperature is 1020°C, and the chemical vapor infiltration method is used for deposition, and the obtained density is 1.0g / cm 3 The C / C green body.

[0082] (3) impregnatio...

Embodiment 2

[0089] The preparation method is basically the same as that of Example 1, except that the weaving is carried out according to the fabric number 2 in Table 1.

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Abstract

The invention relates to a heat transmission ceramic matrix composite material and a preparation method thereof. The preparation method comprises the following steps: (1) preparing carbon fiber prefab: utilizing mesophase pitch-based high thermal conductivity carbon fibers and polyacrylonitrile-based carbon fibers to be mixed and woven into the carbon fiber prefab; (2) preparing a C / C green body:preparing the carbon fiber prefab into the C / C green body with a certain density; (3) dipping, curing and cracking: dipping, curing and cracking the C / C green body in a ceramic precursor solution andrepeating the dipping, curing and cracking step until the weight increment of the composite material meets a design requirement to obtain the heat transmission ceramic matrix composite material. According to the preparation method, the heat conductivity limitation of an existing ceramic matrix composite material is broken through, a technology is controllable and convenient to operate, and a highthermal conductivity carbon fiber application method which is feasible and has excellent technological effects is also provided.

Description

technical field [0001] The invention relates to the technical field of composite material preparation technology, in particular to a method for preparing a thermally conductive ceramic matrix composite material. Background technique [0002] With the continuous development of aerospace technology, the requirements for the anti-oxidation and ablation resistance, heat conduction and thermal management of materials for adjacent space vehicles are also getting higher and higher. The thermal control and thermal balance capabilities in the system have great influence on the performance of various aircraft. decisive influence. The hypersonic vehicle flies in the adjacent space for a long time with high stagnation point temperature, large thermal gradient and thermal stress of components. In this ultra-high temperature environment, the requirements for the oxidation resistance of materials are extremely high, and high thermal conductivity materials are required to conduct and transf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/84
CPCC04B35/83C04B2235/48C04B2235/608C04B2235/96C04B2235/9607
Inventor 王鹏宋环君于艺于新民刘俊鹏霍鹏飞张宝鹏
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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