Carbon/carbon composite material laminated coating and preparation method thereof

A carbon composite material and multi-layer coating technology, which is applied in the field of carbon/carbon composite multi-layer coating and its preparation, can solve the problems of complex exhaust gas treatment, complicated process, and high toxicity

Active Publication Date: 2014-12-10
GUANGDONG INST OF NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the CVD preparation method adopted is complicated, the corrosi

Method used

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  • Carbon/carbon composite material laminated coating and preparation method thereof

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Effect test

Embodiment 1

[0026] 1) Cut the carbon / carbon composite material into a block sample of 15×15×10mm, grind it with 400#-800# sandpaper, then ultrasonically use acetone for 20min, and dry it at 150°C for 1 hour before use.

[0027] 2) Prepare the SiC bottom layer by brushing method: the ratio of material powder is: Si powder 79%, C powder 13%, Al 2 o 3 8% powder, put the powder into ethanol solution and stir evenly to form a slurry, brush the slurry evenly on the surface of the C / C composite material, the thickness of the brush coating is 200μm, put it into a graphite crucible after drying, put In the vacuum furnace, the temperature was raised to 1800°C at a rate of 10°C / min, and the temperature was kept for 2 hours under the protection of argon. Then the temperature was lowered to 1200° C. at a rate of 10° C. / min, and then cooled to room temperature with the furnace to obtain a SiC bottom layer.

[0028] 3) Carbon with SiC underlayer / The carbon composite matrix was ultrasonically cleane...

Embodiment 2

[0034] 1) Cut the carbon / carbon composite material into a block sample of 15×15×10mm, grind it with 400#-800# sandpaper, then ultrasonically use acetone for 30min, and dry it at 150°C for 1.5 hours before use.

[0035] 2) Prepare the SiC bottom layer by brushing method: the ratio of material powder is: Si powder 75%, C powder 15%, Al 2 o 3 10% powder, put the powder into the ethanol solution and stir evenly to form a slurry, brush the slurry evenly on the surface of the C / C composite material, the thickness of the brush coating is 100 μm, put it into a graphite crucible after drying, and put In the vacuum furnace, the temperature was raised to 1700°C at a rate of 10°C / min, and the temperature was kept for 1.5 hours, under argon protection. Then the temperature was lowered to 1200° C. at a rate of 10° C. / min, and then cooled to room temperature with the furnace to obtain a SiC bottom layer.

[0036] 3) Carbon with SiC underlayer / The carbon composite matrix was ultrasonical...

Embodiment 3

[0042] 1) Cut the carbon / carbon composite material into a block sample of 15×15×10mm, grind it with 400#-800# sandpaper, then ultrasonically use acetone for 40min, and dry it at 200°C for 1 hour before use.

[0043] 2) Prepare the SiC bottom layer by spraying method: when the argon flow rate is 40L / min, the H 2 The flow rate is 6L / min, the spray distance is 250mm, the current is 550A, the voltage is 50V, the powder feeding rate is 50g / min, and the thickness of the sprayed Si coating is 400μm. Then the sprayed Si coating was heat-treated in vacuum at 1800 °C for 2 hours to obtain the SiC bottom layer.

[0044] 3) Carbon with SiC underlayer / The carbon composite matrix was ultrasonically cleaned with acetone for 40 minutes, dried and placed in a vacuum chamber for later use.

[0045] 4) Pump the vacuum to below 5×10 -3 Pa, the temperature is 200°C, filled with argon gas, the pressure is 1.0Pa, the bias voltage is 800V, and the ion source is used to test the carbon with SiC b...

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Abstract

The invention discloses a carbon/carbon composite material laminated coating and a preparation method thereof. The laminated coating is sequentially composed of a SiC under layer, a SiC transition layer and an alternative layer of SiC layer/ceramic layer on a base body of the carbon/carbon composite material. According to the preparation method of the carbon/carbon composite material laminated coating, a preparation method of the SiC under layer is realized by brush coating, spray coating or magnetron sputtering. A preparation method of the SiC transition layer and the alternative layer of SiC layer/ceramic layer sequentially comprises the following steps: ultrasonically cleaning the carbon/carbon composite material with the SiC under layer through acetone, and drying the material; cleaning the material through ion source sputtering; and preparing the SiC transition layer and the alternative layer of SiC layer/ceramic layer through magnetron sputtering. The prepared laminated coating disclosed by the invention has excellent oxidation resistance and thermal shock resistance at 1500 DEG C. The preparation method disclosed by the invention has a characteristic of being able to control thickness, and the prepared coating is good in thickness uniformity.

Description

technical field [0001] The invention relates to a multilayer coating of carbon / carbon composite material and a preparation method thereof. Background technique [0002] Carbon / carbon composite material, that is, carbon fiber reinforced carbon matrix composite material, is a new type of high-performance composite material with designable performance and thermal shock resistance, especially suitable for applications requiring weight reduction and stable and reliable physical, chemical and mechanical properties. In extremely high temperature and ultra-high temperature environments, it has been successfully widely used in the field of aerospace. [0003] However, the high-temperature oxidation resistance of carbon / carbon composites is relatively poor. It starts to oxidize at 370°C in an aerobic environment, and rapidly oxidizes when it is higher than 500°C, and destructive damage occurs. The use environment of carbon / carbon composite materials is as high as 1000~2000℃, or even ...

Claims

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Application Information

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IPC IPC(8): C04B41/89
Inventor 韦春贝代明江周克崧刘敏侯惠君林松盛胡芳石倩赵利曾威
Owner GUANGDONG INST OF NEW MATERIALS
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