Ceramic modification C/C composite material with ceramic coating layer and preparation method thereof

A composite material and ceramic coating technology, which is applied in the field of C/C composite material and its preparation, achieves the effects of simple equipment process, controllable coating structure content, and improved linear expansion coefficient

Active Publication Date: 2017-07-25
湖南金钺新材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problem of ultra-high temperature protection of C / C composite materials above 2000°C, the present invention has developed a new process for preparing anti-oxidation and ablation-resistant coatings for C / C composite materials using ultra-high temperature ceramic precursors

Method used

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  • Ceramic modification C/C composite material with ceramic coating layer and preparation method thereof
  • Ceramic modification C/C composite material with ceramic coating layer and preparation method thereof
  • Ceramic modification C/C composite material with ceramic coating layer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0043] Example 1: Using three-dimensional punctured carbon felt as a carbon fiber preform, the density of the carbon fiber preform is 0.8g / cm 3 . First, the carbon fiber preform is densified by a chemical vapor deposition process. The densification process uses propylene as the carbon source gas, nitrogen as the carrier gas, the deposition temperature is 980°C, and the deposition pressure is less than 3kPa. Made by chemical vapor deposition with a density of 1.3g / cm 3 C / C composite materials. Using polycarbosilane and zirconium alkoxide as the precursor of organic ceramics, the two were mixed and dissolved in xylene at a mass ratio of 1:1 to form an organic ceramic precursor solution, and the C / C porous The body undergoes repeated ultra-high temperature ceramic densification treatments. The specific process is as follows: put the C / C composite material prepared by chemical vapor deposition into the impregnation tank, evacuate to below 2kPa, put in the organic ceramic precu...

Embodiment 2

[0047] Example 2: Using needle-punched carbon felt as a carbon fiber preform, the carbon fiber preform is first densified by a chemical vapor deposition process. The densification process uses propylene as the carbon source gas, nitrogen as the carrier gas, the deposition temperature is 980°C, and the deposition pressure is less than 3kPa. After chemical vapor deposition, the prepared density is 1.52g / cm 3 C / C composite materials. Using polycarbosilane and zirconium alkoxide as the precursor of organic ceramics, the two were mixed and dissolved in xylene at a mass ratio of 1:1 to form an organic ceramic precursor solution, and the C / C porous The body undergoes repeated ultra-high temperature ceramic densification treatments. The specific process is as follows: put the C / C composite material prepared by chemical vapor deposition into the impregnation tank, evacuate to below 1kPa, put in the organic ceramic precursor solution to immerse the C / C porous body, and take out the bl...

Embodiment 3

[0051] Embodiment 3: Select needle-punched laminated carbon felt as carbon fiber preform, and the density of carbon fiber preform is 0.56g / cm 3 . First, the carbon fiber preform is densified by a chemical vapor deposition process. The densification process uses propylene as the carbon source gas, nitrogen as the carrier gas, the deposition temperature is 980°C, and the deposition pressure is less than 3kPa. After chemical vapor deposition, the prepared density is 1.3g / cm 3 C / C composite materials. Using zirconium alkoxide and hafnium alkoxide as the precursor of organic ceramics, the C / C porous body is subjected to repeated ultra-high temperature ceramic densification treatment by the ceramic precursor impregnation-cracking process. The specific process is as follows: put the C / C composite material prepared by chemical vapor deposition into the impregnation tank, evacuate to below 1kPa, put in the organic ceramic precursor solution to immerse the C / C porous body, and take o...

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Abstract

The invention relates to a ceramic modification C/C composite material with a ceramic coating layer and a preparation method thereof. The preparation method of the ceramic modification C/C composite material comprises the following steps of performing density increase on a carbon fiber prefabricated body by a chemical vapor deposition process to obtain C/C porous bodies; performing more than once soaking-cracking process on the C/C porous body until the density of the ceramic modification C/C composite material reaches 1.8g/cm<3> or higher; obtaining the ceramic modification C/C composite material. According to the preparation method of the C/C composite material with the ceramic coating, a ceramic outer coating layer is mainly prepared on the surface of the ceramic modification C/C composite material. The method solves the problem of heat expansion coefficient unbalance of the base body and the coating, and has the advantages that the equipment and the process are simple; the operation is easy; the coating structure content is controllable; large-dimension and complicated-shape special-shaped workpieces can be prepared, and the like; great engineering application potential is realized.

Description

technical field [0001] The invention relates to ceramic modification and a C / C composite material with a ceramic coating and a preparation method thereof, in particular to a preparation method of an ablation-resistant ultra-high temperature ceramic coating for a C / C composite material. Background technique [0002] C / C composite materials have become important high-temperature structural materials due to their excellent high-temperature mechanical properties and good thermal shock resistance, and have been widely used in the aerospace field, and their unique properties and application value have been generally recognized. Since C / C composite materials are one of the few structural materials that can be used in a temperature environment exceeding 2000°C, and have a series of unparalleled high-temperature properties, the application fields of C / C composite materials continue to expand in many cutting-edge technical fields such as aerospace. And increasingly occupies an irrepla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B41/87
CPCC04B35/83C04B41/009C04B41/5057C04B41/5059C04B41/87C04B2235/77C04B41/4554C04B41/4517C04B41/4515C04B41/0072
Inventor 杨鑫苏哲安黄启忠薛亮
Owner 湖南金钺新材料有限责任公司
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