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Surface anti-oxidation processing method for aircraft carbon brake disc

A processing method and technology for carbon brake discs, which are applied in mechanical equipment, friction linings, etc., can solve the problems of mechanical properties, thermal conductivity and friction properties, loose material, material failure, etc., and achieve low cost and good combination of process implementation. high performance, low price

Active Publication Date: 2010-05-26
XIAN CHAOMA SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing aircraft carbon brake disc material is easily oxidized in a high-temperature aerobic environment, resulting in loose material, reduced mechanical properties, thermal conductivity and frictional properties, and material failure resulting in safety accidents. Insufficient, provide a surface anti-oxidation treatment method of aircraft carbon brake discs, the method is easy to operate, and can ensure that aircraft carbon brake discs have good oxidation protection performance in high-temperature aerobic environment

Method used

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  • Surface anti-oxidation processing method for aircraft carbon brake disc
  • Surface anti-oxidation processing method for aircraft carbon brake disc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The following components (mass percentage): 40% of distilled water, 30% of phosphoric acid, 5% of boron oxide, 15% of aluminum phosphate and 10% of potassium chloride are mixed and stirred evenly to obtain a phosphate coating solution, and the phosphate coating solution is brushed On the non-friction part of the cleaned aircraft carbon brake disc, put it in an oven to dry at 90°C, and then place it in a high-temperature furnace for high-temperature heat treatment at 300°C in a vacuum state to obtain a bottom phosphoric acid with a thickness of 50um Salt coating.

[0032] Then the following components (mass percentage): 10% of alumina, 5% of zirconia, 35% of boron nitride, 20% of titanium oxide and 30% of silicon powder are mixed and ground uniformly to obtain refractory ceramic powder. The coating solution is used as a solution, and the uniformly ground refractory ceramic powder is poured into the phosphate coating solution in a ratio of 1:1 by the mass ratio of the pho...

Embodiment 2

[0034] The following components (mass percentage): 35% of distilled water, 40% of phosphoric acid, 15% of zinc phosphate and 10% of potassium chloride are mixed and stirred evenly to obtain a phosphate coating solution, and the phosphate coating solution is sprayed on the cleaned aircraft carbon The non-friction part of the brake disc is put into an oven to dry at 110°C, and then placed in a high-temperature furnace for high-temperature heat treatment at 550°C under vacuum to obtain a bottom phosphate coating with a thickness of 100um.

[0035] Then the following components (mass percentage): 20% of alumina, 3% of zirconia, 37% of boron powder, 15% of titanium oxide and 25% of silicon carbide are mixed and ground uniformly to obtain refractory ceramic powder, which is coated with the above-mentioned phosphate The layer liquid is used as a solution, and the uniformly ground refractory ceramic powder is poured into the phosphate coating liquid in a ratio of 2:1 by the mass ratio ...

Embodiment 3

[0037] The following components (mass percentage): 30% of distilled water, 50% of phosphoric acid, 3% of boric acid, 10% of aluminum phosphate, and 7% of sodium chloride were mixed and stirred evenly to obtain a phosphate coating solution, and the phosphate coating solution was brushed on Clean the non-friction part of the aircraft carbon brake disc, put it in an oven to dry at 160°C, and then place it in a high-temperature furnace for high-temperature heat treatment at 650°C in a vacuum state to obtain a bottom layer of phosphate with a thickness of 150um coating.

[0038] Then the following components (mass percentage): 15% of alumina, 8% of zirconia, 42% of boron carbide, 20% of silicon oxide, and 15% of silicon powder were mixed and ground uniformly to obtain refractory ceramic powder, which was coated with the above-mentioned phosphate The layer solution is used as a solution, and the uniformly ground refractory ceramic powder is poured into the phosphate coating solution...

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Abstract

The invention discloses a surface anti-oxidation processing method for an aircraft carbon brake disc, which comprises the following steps: firstly, coating a layer of phosphate coating solution on the surface of a material needing to be processed, and forming a bottom phosphate coating through high temperature heat treatment; secondly, coating a layer of slurry coating which uses refractory ceramic powders as the main raw material and uses the phosphate coating solution as solution on the surface of the bottom phosphate coating; and finally forming a composite coating through the high temperature heat treatment. The composite coating of the invention has anticatalytic effect, and can improve the high temperature anti-oxidation capacity of C / C composite materials, such as the aircraft carbon brake disc and the like, under the condition of sea or salt spray pollution; and the ceramic component in the composite coating is melted and flows at high temperature so as to effectively heal the crackles in the coating, delay the time that oxygen is contacted with C / C materials, and improve the oxidation resistance of the composite coating.

Description

technical field [0001] The invention relates to a surface anti-oxidation treatment method of a carbon / carbon composite material, in particular to a surface anti-oxidation treatment method of an aircraft carbon brake disc. Background technique [0002] Carbon / carbon composite materials have excellent high-temperature mechanical properties, thermal conductivity and friction and wear properties. However, carbon / carbon materials begin to oxidize significantly in the air above 450°C, causing a rapid decline in various properties, especially for aircraft carbon brakes. Disc materials may also cause brake failure or even accidents. Therefore, carbon / carbon composite materials must be treated with anti-oxidation to improve working stability and reliability and prolong service life. [0003] Chinese Patent Authorization Publication No. CN 1640852A discloses a low-temperature anti-oxidation method for carbon / carbon composite materials. Phosphoric acid, zinc dihydrogen phosphate, boric...

Claims

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Application Information

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IPC IPC(8): C04B41/89F16D69/02
Inventor 薛宁娟肖志超苏君明彭志刚潘向涛
Owner XIAN CHAOMA SCI TECH
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