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Charcoal / charcoal composite material SiC / ZrB2-SiC / SiC coating and preparation method thereof

A carbon composite material and composite material technology are applied in the field of preparation of carbon/carbon composite material anti-oxidative ablation coatings, which can solve the problems of easy peeling or poor oxidation performance, poor coating bonding performance, uneven distribution, etc. Excellent oxidative ablation protection

Active Publication Date: 2012-04-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] In order to overcome the shortcomings existing in the prior art or that the coating has poor bonding performance, uneven distribution, easy peeling or poor oxidation performance, or cannot provide good ablation protection for C / C composite materials, the present invention proposes A carbon / carbon composite material SiC / ZrB 2 -SiC / SiC coating and its preparation method

Method used

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  • Charcoal / charcoal composite material SiC / ZrB2-SiC / SiC coating and preparation method thereof
  • Charcoal / charcoal composite material SiC / ZrB2-SiC / SiC coating and preparation method thereof
  • Charcoal / charcoal composite material SiC / ZrB2-SiC / SiC coating and preparation method thereof

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Embodiment 1

[0034] This embodiment is a carbon / carbon composite material SiC / ZrB 2 - SiC / SiC coating, including an inner coating, an outer coating and an intermediate coating, wherein: the thickness of the inner coating is 20 μm, the thickness of the outer coating is 80 μm, and the thickness of the intermediate coating is 80 μm. The inner coating is SiC, and its composition includes 65wt% Si, 20wt% C and 15wt% Al 2 o 3 , the Si, C and Al 2 o 3 All are powder. Intermediate coating is ZrB 2 -SiC coating, and the ZrB 2 75wt% for SiC and 25wt% for SiC. The outer coating is CVD SiC coating.

[0035] This embodiment also proposes a carbon / carbon composite material SiC / ZrB 2 -The preparation method of SiC / SiC coating, its specific process is:

[0036] Step 1, cleaning the C / C composite material sample. The polished C / C composite material was ultrasonically cleaned with absolute ethanol for 20 minutes, and then dried in an oven for later use; the drying temperature was 65°C; the ultraso...

Embodiment 2

[0047] This embodiment is a carbon / carbon composite material SiC / ZrB 2 - SiC / SiC coating, including an inner coating, an outer coating and an intermediate coating, wherein: the thickness of the inner coating is 30 μm, the thickness of the outer coating is 50 μm, and the thickness of the intermediate coating is 60 μm. The inner coating is SiC, and its composition includes 70wt% Si, 18wt% C and 12wt% Al 2 o 3 , the Si, C and Al 2 o 3 All are powder. Intermediate coating is ZrB 2 -SiC coating, and the ZrB 2 85wt% for SiC and 15wt% for SiC. The outer coating is CVD SiC coating.

[0048] This embodiment also proposes a carbon / carbon composite material SiC / ZrB 2 -The preparation method of SiC / SiC coating, its specific process is:

[0049] Step 1, cleaning the C / C composite material sample. Clean the polished C / C composite material ultrasonically with absolute ethanol for 25 minutes, and dry it in an oven for later use; the drying temperature is 75°C;

[0050] Step 2, prep...

Embodiment 3

[0060] This embodiment is a carbon / carbon composite material SiC / ZrB 2 - SiC / SiC coating, including an inner coating, an outer coating and an intermediate coating, wherein: the thickness of the inner coating is 50 μm, the thickness of the outer coating is 30 μm, and the thickness of the intermediate coating is 50 μm. The inner coating is SiC, and its composition includes 75wt% Si, 15wt% C and 10wt% Al 2 o 3 , the Si, C and Al 2 o 3 All are powder. Intermediate coating is ZrB 2 -SiC coating, and the ZrB 2 90wt% for SiC and 10wt% for SiC. The outer coating is CVD SiC coating.

[0061] This embodiment also proposes a carbon / carbon composite material SiC / ZrB 2 -The preparation method of SiC / SiC coating, its specific process is:

[0062] Step 1, cleaning the C / C composite material sample. Clean the polished and polished C / C composite material with anhydrous ethanol for 30 minutes, and put it in an oven to dry for later use; the drying temperature is 80°C;

[0063] Step 2...

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Abstract

A charcoal / charcoal composite material SiC / ZrB2-SiC / SiC coating and a preparation method thereof. The charcoal / charcoal composite material SiC / ZrB2-SiC / SiC coating comprises an internal coating of 20-50 mum, an outer coating of 30-80 mum and an intermediate coating of 50-80 mum. An embedding method is employed to prepare a SiC internal coating, so as to reduce thermal stress of an intermediate coating ZrB2-Si and a C / C composite material. An ultrasonic plasma spraying is employed to prepare a ZrB2-SiC intermediate coating. ZrB2-SiC provides good performances of high temperature ablation, middle and low temperature antioxidation and heat insulation for the C / C composite material. A sedimentation method is employed to prepare a SiC outer coating, so as to effectively heal defects of a coating surface, prevent filtering of oxygen and provide good high temperature oxidation protection for the composite material. Meanwhile, during a middle and low temperature antioxidation process, an antioxidation product B2O3 of ZrB2 can effectively heal defects of a coating and provide good middle temperature oxidation protection for a coating sample.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for preparing a carbon / carbon composite material anti-oxidation and ablation coating. Background technique [0002] Oxidative ablation of carbon / carbon composites has always been the main problem limiting its application. Scholars at home and abroad have proposed different solutions. Anti-oxidative ablation coating technology is considered to be one of the effective ways to solve this problem. After decades of hard work, researchers have developed a variety of coating systems and preparation methods to solve the problems of oxidation and ablation resistance of carbon / carbon composites. It can provide good high-temperature anti-ablation performance for carbon / carbon composite materials. [0003] Document 1 "Wu Dingxing, Dong Shaoming, Ding Yusheng, Zhang Xiangyu, Wang Zhen, Zhou Haijun.C f / SiC composite material SiC / (ZrB 2 -SiC / SiC) 4 Coating preparation and performance rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/89
Inventor 李贺军姚西媛张雨雷付前刚李克智姚栋嘉
Owner NORTHWESTERN POLYTECHNICAL UNIV
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