Method for preparing carbon/carbon composite yttrium silicate whisker reinforced mullite-C-AlPO4 complex external coating

A carbon composite material, -c-alpo4 technology, applied in the field of preparing carbon/carbon composite material composite outer coating, can solve the problems that can not be prepared at one time, the surface of the outer coating is easy to crack, and the coating thickness is insufficient, and achieves good Physical and chemical compatibility, improved high temperature oxidation resistance, uniform thickness

Active Publication Date: 2013-04-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of supercritical fluid technology to prepare C/C composite coatings requires high temperature and high pressure for the preparation process, which requires high equipment requirements, and the formed outer coating must be heat treated in an inert atmosphere. The preparation cycle Relatively long [Bemeburg P L, Krukonis V J.Processing of carbon/carbon composites using supercritical fluid technology[P].United States Patent US5035921,1991], the coating prepared by the in-situ forming method needs to be treated at a high temperature of 1500°C, and Can not be prepared at one time [Huang Jian-Feng, Li He-Jun, Zeng Xie-Rong, Li Ke-Zhi.Surf.coat.Technol.2006,200,5379.], the outer coating prepared by sol-gel method The surface is easy to crack and the coating thickness is insufficient [Huang Jian-Feng, Zeng Xie-Rong, Li He-Jun, Xiong Xin-Bo, Sun Guo-ling.Surf.coat.Technol.2005,190,255.], while using The

Method used

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  • Method for preparing carbon/carbon composite yttrium silicate whisker reinforced mullite-C-AlPO4 complex external coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 2) Take 1.0g of Y 2 Si 2 o 7 Whiskers, 1.0 g of C-AlPO 4 Add 2.0g of mullite powder into the conical flask, then pour 200ml of ethanol into the conical flask to obtain a suspension, then put the suspension into a 600W ultrasonic generator and vibrate for 100min, take it out and put it in Magnetic rotor, placed on a magnetic stirrer and stirred for 12 hours to obtain suspension A;

[0021] 3) Add 0.2g tellurium simple substance to the suspension A, put it into a 600W ultrasonic generator and shake it for 100min, take it out and stir it on a magnetic stirrer for 12h to get solution B;

[0022] 4) Pour solution B into the hydrothermal reaction kettle, and the filling degree is controlled at 70%; then the carbon / carbon composite material sample with SiC inner coating is clamped on the cathode clamp in the hydrothermal kettle, with graphite as the Anode, put the hydrothermal kettle into a DHG-9075A type electric heating constant temperature blast drying box; then connect...

Embodiment 2

[0025] 2) Take 8.0g of Y 2 Si 2 o 7 Whiskers, 5.0 g of C-AlPO 4 Add 5.0g of mullite powder into the conical flask, then pour 400ml of ethanol into the conical flask to obtain a suspension, then put the suspension into a 700W ultrasonic generator and vibrate for 80min, take it out and put it in Magnetic rotor, placed on a magnetic stirrer and stirred for 24 hours to obtain suspension A;

[0026] 3) Add 1.0g of tellurium elemental substance to the suspension A, put it into a 700W ultrasonic generator and shake for 180min, take it out and stir it on a magnetic stirrer for 24h to get solution B;

[0027] 4) Pour solution B into the hydrothermal reaction kettle, and the filling degree is controlled at 68%; then the carbon / carbon composite material sample with SiC inner coating is clamped on the cathode clamp in the hydrothermal kettle, with graphite as the Anode, put the hydrothermal kettle into a DHG-9075A type electric heating constant temperature blast drying box; then conne...

Embodiment 3

[0030] 2) Take 5.0g of Y 2 Si 2 o 7 Whiskers, 3.0 g of C-AlPO 4 Add 3.0g of mullite powder into the conical flask, then pour 300ml of ethanol into the conical flask to obtain a suspension, then put the suspension into an 800W ultrasonic generator and vibrate for 60min, take it out and put it in Magnetic rotor, placed on a magnetic stirrer and stirred for 36h to obtain suspension A;

[0031] 3) Add 0.5g tellurium elemental substance to the suspension A, put it into an 800W ultrasonic generator and shake for 60min, take it out and stir it on a magnetic stirrer for 36h to get solution B;

[0032] 4) Pour solution B into the hydrothermal reaction kettle, and the filling degree is controlled at 65%; then the carbon / carbon composite material sample with SiC inner coating is clamped on the cathode clamp in the hydrothermal kettle, with graphite as the Anode, put the hydrothermal kettle into a DHG-9075A type electric heating constant temperature blast drying box; then connect the ...

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Abstract

The invention relates to a method for preparing a carbon/carbon composite yttrium silicate whisker reinforced mullite-C-AlPO4 complex external coating. A pulsed arc discharge deposition method is adopted to prepare the yttrium silicate whisker reinforced mullite-C-AlPO4 complex antioxidant external coating; the reaction is accomplished in a water heat kettle at one time; pulsed arc discharge sintering is accompanied; the obtained coating is dense and uniform, has a higher interface binding force and is not required to be subjected to post heat treatment; the advantages of yttrium silicate whiskers, mullite and C-AlPO4 are integrated well; and the prepared yttrium silicate whisker reinforced mullite-C-AlPO4 complex antioxidant external coating has a uniform surface without microcracks, is uniform in thickness, has no penetrable holes or cracks, and is higher in binding force and good in oxidation resistance.

Description

technical field [0001] The invention relates to a method for preparing a carbon / carbon composite material composite outer coating, in particular to a method for preparing a carbon / carbon composite material yttrium silicate whisker reinforced mullite-C-AlPO 4 Composite topcoat method Background technique [0002] C / C composite material is also called carbon fiber carbon-based composite material. Because it is only composed of a single carbon element, it not only has the advantages of excellent ablation resistance, low density and low thermal expansion coefficient of carbon and graphite materials, but also has the advantages of high temperature resistance. Has excellent mechanical properties. In particular, its strength does not decrease but increases with the increase of temperature, making it one of the promising high-tech new materials, and is widely used as ablation materials and thermal structural materials in the field of aviation and aerospace technology. However, C / C...

Claims

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Application Information

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IPC IPC(8): C04B41/85
Inventor 黄剑锋郝巍曹丽云费杰殷立雄王开通
Owner SHAANXI UNIV OF SCI & TECH
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