Anti-oxidative coating of charcoal/charcoal composite material and application of anti-oxidative coating

A technology of anti-oxidation coatings and carbon composite materials, applied in the field of coatings, can solve the problems of complex coating preparation and coating process, long production cycle, low and high temperature anti-oxidation effect is not ideal, etc., to improve high temperature anti-oxidation ability , Simple preparation and coating process, excellent anti-oxidation effect

Active Publication Date: 2013-09-04
SHANTOU NORTHWEST AVIATION ARTICLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two patented technologies have improved the anti-oxidation ability of the carbon plate to varying degrees, but the preparation and coating process of the coating are complicated, and the high-temperature anti-oxidation ability needs to be improved.
Chinese Patent Publication No. CN1544536A introduces a phosphate-based carbon/carbon composite anti-oxidation coating, ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Zn 3 (PO 4 ) 2 Soluble in H 3 PO 4 (phosphoric acid); then the H 2 MoSi diluted with O (water) 2 , B, B 2 o 3 、Al 2 o 3 , SiO 2 The mixed solution is poured into the phosphoric acid solution, and the above ingredients are by weight percentage: 10% MoSi 2 , 10%B, 10%B 2 o 3 , 10%SiO2 2 , 10% Al 2 o 3 , 15%Zn 3 (PO 4 ) 2 , 15%H 3 PO 4 , 20%H 2 O; then stir and mix evenly to make a liquid anti-oxidation coating. Apply the liquid anti-oxidation coating on the surface of 5 carbon / carbon composite material samples (sample size: length × width × height = 10mm × 8mm × 6mm, the same below), and then heat to 800°C under the protection of nitrogen , keep warm for 2 hours, and take samples after cooling to 200°C with the furnace. The sample was heated in an air environment at 800°C for 10 hours, and the average oxidation weight loss rate was 1.14%.

Embodiment 2

[0025] Zn 3 (PO 4 ) 2 Soluble in H 3 PO 4 (phosphoric acid); then the H 2 MoSi diluted with O (water) 2 , B, B 2 o 3 、Al 2 o 3 , SiO 2 The mixed solution is poured into the phosphoric acid solution, and the above ingredients are by weight percentage: 15% MoSi 2 , 5%B, 15%B 2 o 3 , 5%SiO 2 , 10% Al 2 o 3 , 15%Zn 3 (PO 4 ) 2 , 15%H 3 PO 4 , 20%H 2 O; then stir and mix evenly to make a liquid anti-oxidation coating. The liquid anti-oxidation coating was coated on the surface of 5 carbon / carbon composite material samples, and then heated to 900°C under the protection of nitrogen, kept for 3 hours, and cooled to 200°C with the furnace to take samples. The sample was heated in an air environment at 900°C for 5 hours, and the average oxidation weight loss rate was 1.38%.

Embodiment 3

[0027] Zn 3 (PO 4 ) 2 Soluble in H 3 PO 4 (phosphoric acid); then the H 2 MoSi diluted with O (water) 2 , B, B 2 o 3 、Al 2 o 3 , SiO 2The mixed solution is poured into the phosphoric acid solution, and the above ingredients are by weight percentage: 15% MoSi 2 , 5%B, 15%B 2 o 3 , 10%SiO2 2 , 10%Al 2 o 3 , 10%Zn 3 (PO 4 ) 2 , 20%H 3 PO 4 , 15%H 2 O; then stir and mix evenly to make a liquid anti-oxidation coating. The liquid anti-oxidation coating was coated on the surface of 5 carbon / carbon composite material samples, and then heated to 1000°C under the protection of nitrogen, kept for 2.5 hours, and cooled to 200°C with the furnace to take samples. The sample was heated in an air environment at 1000°C for 3 hours, and the average oxidation weight loss rate was 1.92%.

[0028] According to the Chinese national military standard GJB 4193-2001 "General Specifications for Military Aircraft Brake Discs" "3.13 Anti-oxidation Performance", "The anti-oxidation ...

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PUM

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Abstract

The invention relates to an anti-oxidative coating of a charcoal/charcoal composite material and an application of the anti-oxidative coating. The anti-oxidative coating of the charcoal/charcoal composite material is characterized by comprising the components in percentage by weight: 10-15% of MoSi2, 5-10% of B, 10-15% of B2O3, 10-15% of SiO2, 5-10% of Al2O3, 10-15% of Zn3(PO4)2, 15-20% of H3PO4 and15-20% of H2O. The core technology of the invention is as follows: components such as boride are introduced into molybdenum silicide. When temperature is over 700 DEG C, a symbiotic glass borosilicate anti-oxidative film is compact, airtight and self-healing and is stable to adhere to the surface of the charcoal/charcoal composite material. The higher the temperature is, the more thorough the protective film is formed. The anti-oxidative coating is suitable for long-time work at 400-1000 DEG C. The preparation and coating processes of the anti-oxidative coating are simpler, so that the anti-oxidative coating is suitable for anti-oxidative coatings of various forms of charcoal discs.

Description

technical field [0001] The invention relates to a coating, in particular to an anti-oxidation coating of a carbon / carbon composite material and its application. Background technique [0002] Carbon / carbon composite materials will undergo oxidation reaction when the temperature is higher than 370 ° C, and will be significantly oxidized when the temperature exceeds 450 ° C, resulting in a sharp deterioration of the physical, chemical and mechanical properties of the material. At the moment of normal landing and braking of the aircraft, the surface temperature of the brake disc is as high as 1000 ° C, the body temperature reaches 600 ° C to 800 ° C, and the overload and emergency braking body temperature can reach 800 ° C to 1000 ° C. Therefore, the high-temperature anti-oxidation of carbon / carbon composite brake discs (hereinafter referred to as carbon discs) used for heavy-duty braking such as aircraft must become a key technology to ensure brake safety. [0003] Over the ye...

Claims

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Application Information

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IPC IPC(8): C04B41/85
Inventor 陈贤海林虹陈佳纯
Owner SHANTOU NORTHWEST AVIATION ARTICLES
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