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Surface erosion-resistant composite coating of carbon/carbon composite, preparation method and application thereof

A carbon composite material and composite coating technology, applied in metal material coating process, coating, layered products, etc., can solve the problems of high volatility, adverse effects of coating, increase production cost, etc. Excellent thermal shock resistance, ablation resistance of the coating and good thermal shock resistance

Inactive Publication Date: 2012-07-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silicon carbide is highly volatile at around 2500°C, which can adversely affect the coating
In addition, the preparation of the silicon carbide interlayer requires a special deposition furnace or modification of the existing reaction furnace, which will increase the preparation cost

Method used

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  • Surface erosion-resistant composite coating of carbon/carbon composite, preparation method and application thereof
  • Surface erosion-resistant composite coating of carbon/carbon composite, preparation method and application thereof
  • Surface erosion-resistant composite coating of carbon/carbon composite, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The first step: base layer ZrC 1.0 Preparation of +C

[0050] The surface of the carbon / carbon composite prepared by the chemical vapor infiltration process was polished and polished, then ultrasonically cleaned, and dried for use; the chemically pure ZrCl with an average particle size of 10 μm 4 The powder is placed in an oven for dehumidification treatment at a temperature of 80°C for 30 minutes. The surface-treated carbon / carbon composites were placed in an atmospheric pressure chemical vapor deposition furnace, and the dried ZrCl 4 The powder is placed in the screw powder feeder. Introduce Ar carrier gas and Ar dilute gas, turn on the chemical vapor deposition furnace, and raise the temperature to 1100°C at a rate of 5min / °C. (2) Turn on the screw powder feeder and keep the ZrCl 4 Powder conveying speed 2.0g / min. At the same time with H 2 / C 3 h 6 =14:1 ratio, through H 2 and C 3 h 6 , after 15 minutes of deposition, the carbon / carbon composite material wa...

Embodiment 2

[0057] The first step: base layer ZrC 1.0 Preparation of +C

[0058] The surface of the carbon / carbon composite prepared by the chemical vapor infiltration process was polished and polished, then ultrasonically cleaned, and dried for use; the chemically pure ZrCl with an average particle size of 10 μm 4 The powder is placed in an oven for dehumidification treatment at a temperature of 80°C for 30 minutes. The surface-treated carbon / carbon composites were placed in an atmospheric pressure chemical vapor deposition furnace, and the dried ZrCl 4 The powder is placed in the screw powder feeder. Introduce Ar carrier gas and Ar dilute gas, turn on the chemical vapor deposition furnace, and raise the temperature to 1200°C at a rate of 5min / °C. (2) Turn on the screw powder feeder and keep the ZrCl 4 Powder conveying speed 2.0g / min. At the same time with H 2 / C 3 h 6 = 16:1 ratio, pass into H 2 and C 3 h 6 , after 20 minutes of deposition, the carbon / carbon composite material...

Embodiment 3

[0065] The first step: base layer ZrC 1.0 Preparation of +C

[0066] The surface of the carbon / carbon composite prepared by the chemical vapor infiltration process was polished and polished, then ultrasonically cleaned, and dried for use; the chemically pure ZrCl with an average particle size of 10 μm 4 The powder is placed in an oven for dehumidification treatment at a temperature of 80°C for 30 minutes. The surface-treated carbon / carbon composites were placed in an atmospheric pressure chemical vapor deposition furnace, and the dried ZrCl 4 The powder is placed in the screw powder feeder. Introduce Ar carrier gas and Ar dilute gas, turn on the chemical vapor deposition furnace, and raise the temperature to 1300°C at a rate of 5min / °C. (2) Turn on the screw powder feeder and keep the ZrCl 4 Powder conveying speed 2.0g / min. At the same time with H 2 / C 3 h 6 = 18:1 ratio, through H 2 and C 3 h 6 , after 30 minutes of deposition, the carbon / carbon composite material w...

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Abstract

The invention relates to a surface erosion-resistant composite coating of a carbon / carbon composite, which sequentially consists of ZrC0.7 / ZrC1.0 / ZrC1.0+C form outside to inside. The preparation method of the surface erosion-resistant composite coating comprises the following three steps: the preparation of a basal layer ZrC1.0+C, the preparation of a middle layer ZrC1.0 and the preparation of anouter-coating layer ZrC0.7; and is characterized in that in a chemical vapor deposition furnace at normal pressure, zirconium tetrachloride is used as the zirconium source, Ar gas is used as the carrier gas, C3H6, acetylene and methane are respectively used as the carbon source gasses, Ar is used as the diluent, H2 is used as the reducing gas, and the surface erosion-resistant composite coating is obtained by deposition at the temperature of 1100-1300 DEG C. The invention has the advantages of simple process method, convenient operation, single heat, stepwise deposition preparation of the composite coating with gradient-changed carbon contents, firm combination between the coating and the basal body, no penetration crack and interlayer crack, and good coating erosion resistance and thermal shock resistance, can realize the industrialized production, and is applicable to the preparation of the erosion-resistant composite coating of the carbon / carbon composite by the chemical gas-phase permeation or the liquid-phase impregnation process.

Description

technical field [0001] The invention relates to a surface treatment of a carbon / carbon composite material, in particular to an anti-ablation composite coating on the surface of a carbon / carbon composite material and its preparation method and application; it belongs to the technical field of chemical vapor deposition. Background technique [0002] Carbon / carbon composites have a series of excellent comprehensive properties such as high specific strength, high specific modulus, good toughness, excellent strength retention at high temperature, creep resistance and thermal shock resistance, and are so far used in solid rocket motors. Throat lining is an ideal ablation structural material. However, under aerobic conditions, the initial oxidation temperature of carbon / carbon composites is 370°C; when it is higher than 500°C, the carbon / carbon composites will be rapidly oxidized and destructively damaged. At the same time, carbon / carbon composites are also easily oxidized, eroded...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B9/00C23C16/30C23C16/32C23C16/455
Inventor 熊翔孙威李国栋张红波肖鹏陈招科黄伯云
Owner CENT SOUTH UNIV
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