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Phosphate anti-oxidation coating of carbon/carbon composite material and coating process thereof

A technology of carbon composite materials and phosphate, which is applied to the coating process for making the above-mentioned phosphate anti-oxidation coating, and the field of phosphate anti-oxidation coating of carbon/carbon composite materials, which can solve the problems of high raw material cost, difficult processing, Problems such as difficulty in field maintenance, etc., achieve the effect of simple preparation process and wide application range

Active Publication Date: 2020-07-03
德翼高科(杭州)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to avoid the deficiencies of the prior art, the present invention proposes a phosphate anti-oxidation coating of a carbon / carbon composite material, which uses a phosphate anti-oxidation coating to replace the anti-oxidation coating of the traditional borosilicate series, thereby It solves the shortcomings of existing coating technology such as high toxicity, high cost of raw materials, difficult control of coating thickness, difficult post-processing, and difficult field maintenance, etc., and the preparation method is simple and the application range is wide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] According to weight percentage, dry, grind and mix the powder of aluminum hydroxide 25%-30%, CeO 25%-8%, then add phosphorus oxide 20%-25%, distilled water 40%-60%, and stir evenly; Heat the mixture to 100°C and keep it for 20-30 minutes to fully react to form a phosphate aqueous solution; hot-coat it on the non-friction surface of the carbon brake disc of the MA60 aircraft, and treat it at a high temperature under a controlled atmosphere of 1200°C Serve in 1.5 hours.

[0034] Performance tests were carried out on the above carbon brake discs to test the performance of the phosphate anti-oxidation coating, as follows:

[0035] ① Static heating simulation test.

[0036] Equipment: Thermogravimetric Analyzer (STA409DG / DG);

[0037] Test conditions: placed at 700°C for 50 hours;

[0038] Test results: The oxidation weight loss rate is only 1.96%.

[0039] ② Thermal shock test.

[0040] Equipment: double-tube high-temperature carbon-fixing furnace (SK-2.5-14S);

[004...

Embodiment 2

[0048] By weight percentage, Al 2 o 330%-35% and Pr3%-6% powder are dried, ground and mixed, then add phosphoric acid 25%-30% and distilled water 45%-50% and stir evenly; heat the mixture to 100°C and keep for 30 - 40 minutes, fully reacted to form a phosphate aqueous solution; hot-coated on the non-friction surface of a certain type of aircraft carbon brake disc, and treated at a high temperature of 900 ° C for 4 hours under a controlled atmosphere.

[0049] Performance tests were carried out on the above carbon brake discs to test the performance of the phosphate anti-oxidation coating, as follows:

[0050] ① Static heating simulation test.

[0051] Equipment: Thermogravimetric Analyzer (STA409DG / DG);

[0052] Test conditions: placed at 800°C for 30 hours;

[0053] Test results: The oxidation weight loss rate is only 2.78%.

[0054] ② Ground bench test.

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PUM

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Abstract

The invention discloses a phosphate anti-oxidation coating of a carbon / carbon composite material. The phosphate anti-oxidation coating comprises the following components in percentage by weight: 20 to60 percent of phosphoric acid or phosphorus oxide, 25 to 50 percent of aluminum and calcium stabilizers, 1 to 10 percent of rare earth metal or rare earth metal oxide and 40 to 80 percent of water. The invention further discloses a coating process for manufacturing a phosphate anti-oxidation coating. The coating process comprises the steps of preparing a phosphate mixed solution, and carrying outpretreating, brushing and high-temperature treatment. Compared with borosilicate series anti-oxidation coatings, the anti-oxidation coating has the advantages of being resistant to collision, excellent in anti-oxidation performance, simple in preparation method, wide in application range, remarkable in economic benefit, safe and environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of high-temperature anti-oxidation coatings for carbon / carbon composite material brake discs, and in particular relates to a phosphate anti-oxidation coating of carbon / carbon composite materials, a preparation method of the anti-oxidation coating mixed solution, and the preparation of the above-mentioned phosphoric acid Coating process of salt anti-oxidation coating. Background technique [0002] Carbon / carbon composites have high strength, high specific modulus, low thermal expansion coefficient and good dimensional stability in high temperature environment, and have been widely used. Since the 1970s, many aircrafts at home and abroad have been equipped with carbon brake discs that integrate structural elements, friction elements and heat-absorbing elements. However, when the carbon brake disc as an important brake component is above 450°C, it is prone to oxidation and causes serious attenuation of mechani...

Claims

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Application Information

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IPC IPC(8): C04B41/87
CPCC04B41/87C04B41/5048C04B41/009C04B35/83C04B41/4539C04B41/0072
Inventor 杜东伟赵美玲沈杰
Owner 德翼高科(杭州)科技有限公司
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