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Preparation method of SiC/C-AlPO4-mullite antioxidation coating for C/C composite material

A carbon composite material and anti-oxidation coating technology, which is applied in the field of preparation of anti-oxidation coatings, can solve the problems of easy cracking on the surface of the outer coating, cannot be completed in one preparation, insufficient coating thickness, etc., and achieves simple and efficient preparation and deposition. The effect of easy process control and low cost

Active Publication Date: 2012-09-19
深圳市贝尔新材料科技有限公司
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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 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 [HuangJian-Feng, Zeng Xie-Rong, Li He-Jun, Xiong Xin-Bo, Sun Guo-ling.Surf.coat.Technol.2005,190,255.], and adopt The coating prepared by the 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 using explosive spraying and ultrasonic spraying methods, the process still has many imperfections, and the prepared high-temperature oxidation resistance still needs 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 SiC was prepared by ultrasonic-microwave hydrothermoelectrophoretic deposition / C-AlPO 4 -The method of mullite coating has not been reported yet

Method used

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  • Preparation method of SiC/C-AlPO4-mullite antioxidation coating for C/C composite material
  • Preparation method of SiC/C-AlPO4-mullite antioxidation coating for C/C composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Pretreatment of carbon / carbon composite materials: take the 3D-carbon / carbon composite materials used in aircraft brake pads and process them into 10×10×10mm 3 The samples were subjected to surface treatment of grinding and chamfering, then cleaned with absolute ethanol in an ultrasonic generator, and dried in an oven;

[0021] 2) Preparation of silicon carbide transition layer: Take commercially available silicon powder and graphite powder, and prepare the powder according to the mass ratio of Si powder: graphite powder = 2:1 (record as A).

[0022] 3) Take commercially available Al 2 o 3 Powder, WO 3 Powder, B 2 o 3 Powder, by Al 2 o 3 Powder: WO 3 Powder: B 2 o 3 Powder = 1:1:3 mass ratio to prepare powder (recorded as B).

[0023] 4) Take A and B, and prepare embedding powder according to the mass ratio of A:B=2:1 (record as C).

[0024] 5) Then put the carbon / carbon sample into the graphite crucible, add embedding powder C, put the graphite crucible i...

Embodiment 2

[0027] 1) Pretreatment of carbon / carbon composite materials: take the 2D-carbon / carbon composite materials used in aircraft brake pads and process them into 10×10×10mm 3 The samples were subjected to surface treatment of grinding and chamfering, then cleaned with absolute ethanol in an ultrasonic generator, and dried in an oven;

[0028] 2) Preparation of silicon carbide transition layer: Take commercially available silicon powder and graphite powder, and prepare the powder according to the mass ratio of Si powder: graphite powder = 3:2 (record as A).

[0029] 3) Take commercially available Al 2 o 3 Powder, WO 3 Powder, B 2 o 3 Powder, by Al 2 o 3 Powder: WO 3 Powder: B 2 o 3 Powder = 1:2:3 mass ratio to prepare powder (recorded as B).

[0030] 4) Take A and B, and prepare embedding powder according to the mass ratio of A:B=3:2 (record as C).

[0031] 5) Then put the carbon / carbon sample into the graphite crucible, add embedding powder C, put the graphite crucible i...

Embodiment 3

[0034] 1) Pretreatment of carbon / carbon composite materials: take the 2D-carbon / carbon composite materials used in aircraft brake pads and process them into 10×10×10mm 3 The samples were subjected to surface treatment of grinding and chamfering, then cleaned with absolute ethanol in an ultrasonic generator, and dried in an oven;

[0035] 2) Preparation of silicon carbide transition layer: Take commercially available silicon powder and graphite powder, and prepare the powder according to the mass ratio of Si powder: graphite powder = 4:5 (record as A).

[0036] 3) Take commercially available Al 2 o 3 Powder, WO 3 Powder, B 2 o 3 Powder, by Al 2 o 3 Powder: WO 3 Powder: B 2 o 3 Powder = 2:1:4 mass ratio to prepare powder (recorded as B).

[0037] 4) Take A and B, and prepare embedding powder according to the mass ratio of A:B=4:3 (record as C).

[0038] 5) Then put the carbon / carbon sample into the graphite crucible, add embedding powder C, put the graphite crucible i...

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Abstract

The invention relates to a preparation method of an SiC / C-AlPO4-mullite antioxidation coating for a C / C composite material, which comprises the following steps: mixing silicon powder and graphite powder to obtain powder A; mixing Al2O3 powder, WO3 powder and B2O3 powder to obtain powder B; mixing the powder A and the powder B to obtain embedded powder C; putting a sample in a graphite crucible, adding the embedded powder C, putting the graphite crucible in a vertical vacuum furnace, heating to react while introducing argon as a protective atmosphere, cooling to room temperature, and cleaning with anhydrous alcohol in ultrasonic waves to obtain a silicon carbide transition layer for the C / C composite material; adding the C-AlPO4 and the mullite powder into methanol, adding iodine to obtain a suspension, and putting the suspension in a hydrothermal kettle, wherein the cathode adopts the C / C composite material with the silicon carbide transition layer; and sealing the hydrothermal kettle, putting the hydrothermal kettle in an ultrasonic-microwave generator, depositing, taking out the sample, and drying to obtain the SiC / C-AlPO4-mullite antioxidation coating for the C / C composite material. The composite coating can protect the C / C composite material at 1500 DEG C in static air for 322 hours, and the oxidative weight loss is less than 2%.

Description

technical field [0001] The invention relates to a preparation method of an anti-oxidation coating, in particular to a carbon / carbon composite material SiC / C-AlPO 4 -Preparation method of mullite anti-oxidation coating. Background technique [0002] In recent years, carbon / carbon composites have gradually become a research hotspot. Due to the characteristics of low thermal expansion coefficient, low density, ablation resistance, corrosion resistance, stable friction coefficient, good thermal and electrical conductivity, high strength and high modulus of carbon / carbon composite materials, especially the mechanical properties do not decrease but increase with the increase of temperature. characteristics, so it is used in aviation, aerospace and civil industry. However, many of its above-mentioned properties can only be maintained in an inert atmosphere or below 450 °C, and the oxidation weight loss will significantly reduce the mechanical properties of carbon / carbon composite...

Claims

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Application Information

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IPC IPC(8): C04B41/89
Inventor 曹丽云王开通黄剑锋刘亮亮辛宇卓艺乔
Owner 深圳市贝尔新材料科技有限公司
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