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Preparation method of ceramic-based composite material component with abradable coating and the component

A composite material component and composite material technology, which is applied in the field of ceramic matrix composite material surface treatment, can solve the problems of poor thermal matching between abradable coatings and ceramic matrix composite materials, weak components with weak oxidation resistance, poor mechanical properties, etc. The effect of exposed area, reducing thermal stress and increasing contact area

Inactive Publication Date: 2020-04-10
XIAN XINGUI CERAMIC COMPOSITE MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of poor mechanical properties, short service life of components with weak oxidation resistance and poor thermal matching between abradable coatings and ceramic matrix composites existing in existing ceramic matrix composite components with abradable coatings, the present invention provides A preparation method of a ceramic matrix composite material component with an abradable coating and the component; by processing a certain number of grooves and blind holes on the surface of the ceramic matrix composite material matrix, the abradable coating and the ceramic matrix composite material matrix are strengthened The bonding force makes the connection between the two more closely, the durability is higher, and the mechanical properties, oxidation resistance and service life of such components are further improved

Method used

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  • Preparation method of ceramic-based composite material component with abradable coating and the component
  • Preparation method of ceramic-based composite material component with abradable coating and the component
  • Preparation method of ceramic-based composite material component with abradable coating and the component

Examples

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Effect test

Embodiment 1

[0054] In this example, a ceramic matrix composite material specimen with an abradable coating was prepared through the following process:

[0055] Step 1, preparing the ceramic matrix composite material matrix, the specific process is:

[0056](1.1), select T300-1K carbon fiber (including not limited to this grade), weave it into two-dimensional plain weave, use 240mm×150mm two-dimensional plain weave to laminate 25 layers, and use 1K carbon fiber to stitch distance 5mm ×5mm needle-punched connection along the thickness direction, sew 25 layers of two-dimensional plain weave together, so as to obtain a bulk density of 0.70g / cm 3 , a carbon fiber preform with a carbon fiber volume fraction of 40.0% to 42.0%.

[0057] (1.2) Clamp the carbon fiber prefabricated body with a graphite mold, place it in a CVI deposition furnace, and deposit a pyrolytic carbon interface layer (PyC) by vapor deposition. The structure of the specific graphite fixture is as follows Figure 4 As shown...

Embodiment 2

[0079] In this example, a ceramic matrix composite member with an abradable coating is prepared through the following process:

[0080] Step 1, preparing a ceramic matrix composite material matrix;

[0081] Step 1.1. Select T300-1K carbon fiber (including not limited to this grade) and weave it into two-dimensional plain weave; after laminating 25 layers of two-dimensional plain weave with a size of 240mm×150mm, use 1K carbon fiber to weave 25 layers of two-dimensional plain weave stitched together to obtain a bulk density of 0.70g / cm 3 , a carbon fiber preform with a carbon fiber volume fraction of 40.0% to 42.0%.

[0082] Step 1.2, clamp the carbon fiber prefabricated body obtained in step 1.1 with a graphite mold, place it in a CVI deposition furnace, and deposit a pyrolytic carbon interface layer PyC by vapor deposition; adopt a CVI method to deposit a pyrolytic carbon interface layer (PyC). : The deposition temperature is 900-1100°C, the atmosphere pressure is 0.2-0.3KP...

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Abstract

The invention belongs to the field of surface treatment of ceramic-based composite materials, and relates to a preparation method of a ceramic-based composite material component with an abradable coating and the component, solving the problems that ceramic-based composite material components with abradable coatings in the prior art are poor in mechanical performance, weak in oxidation resistance,short in service lifetime and poor in matching performance between the coatings and the ceramic-based composite materials. By machining a certain number of grooves and blind holes in the surface of the matrix of the ceramic-based composite material, the bonding force between the abradable coating and the matrix of the ceramic-based composite material is improved, making connection tighter, achieving higher durability, and further improving mechanical performance, oxidation resistance and service lifetime of the component.

Description

technical field [0001] The invention belongs to the field of surface treatment of ceramic matrix composite materials, and in particular relates to a surface passivation treatment method for processing grooves on the surface of ceramic matrix composite materials to improve the bonding force between the surface coating of ceramic matrix composite materials and the matrix of ceramic matrix composite materials and durability. Background technique [0002] Continuous fiber toughened silicon carbide ceramic matrix composites are ideal high-temperature structural materials, including C / SiC ceramic matrix composites and SiC / SiC ceramic matrix composites, which have high temperature resistance, high specific strength, low density, and ablation resistance. , high specific modulus, anti-oxidation and other excellent properties, it is a lightweight composite material that integrates structural load-bearing and harsh environments. It has great application potential. [0003] SiC / SiC ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/565C04B35/622C04B41/87C04B41/91
CPCC04B35/565C04B35/622C04B41/5059C04B41/87C04B41/91C04B41/53C04B2235/614C04B2235/5248
Inventor 陈旭王佳民廖军刚刘梦珠卜石郭宏强李建章成来飞
Owner XIAN XINGUI CERAMIC COMPOSITE MATERIAL CO LTD
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