A kind of preparation method of c-alpo4-mosi2 composite anti-oxidation coating

A technology of c-alpo4-mosi2, anti-oxidation coating, applied in the field of preparation of carbon/carbon composite material composite outer coating, can solve the problems of insufficient coating thickness, easy cracking on the surface of the outer coating, high requirements, etc. The reaction is complete and sufficient, simple and efficient preparation, and the effect of accelerating the deposition rate

Active Publication Date: 2014-10-01
杨洁如
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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 US 5035921,1991], the coating prepared by the in-situ forming method needs to be treated at a high temperature of 1500°C, And it cannot 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 of the layer 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 The preparation of the coating by the molten slurry coating reaction method still has the disadvantages of multiple coatings, which cannot be completed at one time, and requires post-heat treatment [Fu Qian-Gang, Li He-Jun, Wang Yong-Jie, Li Ke-Zhi, Tao Jun .Surface&Coating Technology.2010,204,1832.], although some alloy coatings have been prepared by explosive spraying and ultrasonic spraying, the process still has many imperfections, and the prepared high-temperature oxidation resistance performance still needs to be improved. Further improvement [Terentieva V S, Bogachkova O P, Goriatcheva E V.Method for protecting products made of a refractory material against oxidation, and resulting products[p].US5677060,1997.], while using electromagnetic induction to heat the cathode rotating hydrothermal electrophoresis arc Preparation of MoSi by Discharge Deposition 2 -C-AlPO 4 The method of composite outer coating has not been reported yet

Method used

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  • A kind of preparation method of c-alpo4-mosi2 composite anti-oxidation coating
  • A kind of preparation method of c-alpo4-mosi2 composite anti-oxidation coating

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Experimental program
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Effect test

Embodiment 1

[0028] 1) Commercially available aluminum phosphate powder was calcined at 1300°C for 30 minutes, and then wet ball milled to produce C-AlPO with an average particle size of 3-6 μm 4 Powder, the commercially available molybdenum disilicide powder is dry-milled to make MoSi with an average particle size of 3-6 μm 2 powder, then take 1g of C-AlPO with an average particle size of 3-6μm 4 Powder, 1g of MoSi with an average particle size of 3-6μm 2 Add the powder to 500ml of isopropanol with a purity ≥ 99.8% to prepare a suspension A;

[0029] 2) Put suspension A into a 500W ultrasonic generator and shake for 90 minutes, then place it on a magnetic stirrer and stir for 12 hours;

[0030] 3) Add simple tellurium with a purity ≥ 99.7% to the suspension A, control the concentration of tellurium to 0.8g / L, then put it into an ultrasonic generator with a power of 500W to vibrate for 90min, then place it on a magnetic stirrer and stir for 12h , the resulting solution is suspension B; ...

Embodiment 2

[0034] 1) Commercially available aluminum phosphate powder was calcined at 1300°C for 30 minutes, and then wet ball milled to produce C-AlPO with an average particle size of 3-6 μm 4 Powder, the commercially available molybdenum disilicide powder is dry-milled to make MoSi with an average particle size of 3-6 μm 2 powder, and then take 19g of C-AlPO with an average particle size of 3-6μm 4 Powder, 13g of MoSi with an average particle size of 3-6μm 2 Add the powder to 800ml of isopropanol with a purity ≥ 99.8% to prepare a suspension A;

[0035] 2) Put the suspension A into a 700W ultrasonic generator and vibrate for 80 minutes, then place it on a magnetic stirrer and stir for 24 hours;

[0036] 3) Add simple tellurium with a purity ≥ 99.7% to the suspension A, control the concentration of tellurium to 1.2g / L, then put it into an ultrasonic generator with a power of 700W to vibrate for 80min, and then place it on a magnetic stirrer to stir for 24h , the resulting solution is...

Embodiment 3

[0040] 1) Commercially available aluminum phosphate powder was calcined at 1300°C for 30 minutes, and then wet ball milled to produce C-AlPO with an average particle size of 3-6 μm 4 Powder, commercially available molybdenum disilicide powder is dry-milled to produce MoSi with an average particle size of 3-6 μm 2 powder, then take 28g of C-AlPO with an average particle size of 3-6μm 4 Powder, 12g of MoSi with an average particle size of 3-6μm 2 Add the powder to 650ml of isopropanol with a purity ≥ 99.8% to prepare a suspension A;

[0041] 2) Put the suspension A into an ultrasonic generator with a power of 1000W and vibrate for 70 minutes, then place it on a magnetic stirrer and stir for 30 hours;

[0042] 3) Add simple tellurium with a purity ≥ 99.7% to the suspension A, control the concentration of tellurium to 1.6g / L, then put it into an ultrasonic generator with a power of 1000W to vibrate for 70min, then place it on a magnetic stirrer and stir for 30h , the resulting ...

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Abstract

The invention provides a method for preparing a C-AlPO4-MoSi2 composite anti-oxidization coating layer once in a hydrothermal kettle without later-stage thermal treatment. The surface of the prepared C-AlPO4-MoSi2 composite anti-oxidization coating layer is uniform and has no micro cracks, the thickness is uniform, and penetratable holes and cracks are not produced. The method comprises the following steps of: mixing 1.0 to 40.0 grams of C-AlPO4 powder body and 1.0 to 20.0 grams of MoSi2 powder body, adding 500 to 1,200 ml of isopropyl alcohol into the mixture so as to prepare a suspension A, performing ultrasonic concussion and magnetic agitating, depositing the coating layer on a carbon / carbon composite material test sample with a SiC inner coating layer by an electromagnetic induction heating negative electrode rotary hydrothermal electrophoresis arc discharging deposition method, and finally drying. The method is short in preparation period, simple in process, convenient to operate and low in preparation cost; and raw materials are readily available.

Description

technical field [0001] The invention relates to a preparation method of a carbon / carbon composite material composite outer coating, in particular to a C-AlPO 4 -MoSi 2 Preparation method of composite anti-oxidation coating. 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 composites are rapidly oxidized in an oxidizing atmosphere...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/85C04B35/83
Inventor 曹丽云郝巍黄剑锋费杰马凤兰殷立雄王开通杜鸣菲
Owner 杨洁如
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