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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  • 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 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.coa

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
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Example Embodiment

[0019] Example 1:

[0020] 1) Pretreatment of carbon / carbon composite material: take the 3D-carbon / carbon composite material used in aircraft brake pads and process it into 10×10×10mm 3 The sample is polished and chamfered, and then cleaned in an ultrasonic generator with absolute ethanol, 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 (denoted as A).

[0022] 3) Take commercially available Al 2 O 3 Powder, WO 3 Pink, B 2 O 3 Powder, press Al 2 O 3 Powder: WO 3 Pink: B 2 O 3 The powder is prepared with a mass ratio of 1:1:3 (denoted as B).

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

[0024] 5) Then put the carbon / carbon sample into the graphite crucible, and add the embedded powder C, put the graphite crucible into the vertical vacuum...

Example Embodiment

[0026] Example 2:

[0027] 1) Pretreatment of carbon / carbon composite material: take the 2D-carbon / carbon composite material used in aircraft brake pads and process it into 10×10×10mm 3 The sample is polished and chamfered, and then cleaned in an ultrasonic generator with absolute ethanol, 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 (denoted as A).

[0029] 3) Take commercially available Al 2 O 3 Powder, WO 3 Pink, B 2 O 3 Powder, press Al 2 O 3 Powder: WO 3 Pink: B 2 O 3 The mass ratio of powder = 1:2:3 is used to prepare powder (denoted as B).

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

[0031] 5) Then put the carbon / carbon sample into the graphite crucible, and add the embedded powder C, put the graphite crucible into the vertica...

Example Embodiment

[0033] Example 3:

[0034] 1) Pretreatment of carbon / carbon composite material: take the 2D-carbon / carbon composite material used in aircraft brake pads and process it into 10×10×10mm 3 The sample is polished and chamfered, and then cleaned in an ultrasonic generator with absolute ethanol, 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 (denoted as A).

[0036] 3) Take commercially available Al 2 O 3 Powder, WO 3 Pink, B 2 O 3 Powder, press Al 2 O 3 Powder: WO 3 Pink: B 2 O 3 Powder = 2:1:4 mass ratio prepared powder (denoted as B).

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

[0038] 5) Then put the carbon / carbon sample into the graphite crucible, and add the embedded powder C, put the graphite crucible into the vertical vacuum furnace,...

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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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