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A method for improving the anti-oxidative ablation performance of materials based on surface microstructure modification

An ablation performance and anti-oxidation technology, which is applied in the coating process and coating of metal materials, can solve the problems of easy damage to the base material and aggravate the ablation degree of the material, so as to reduce the final thickness and improve the anti-oxidation ablation performance , the effect of ensuring integrity

Active Publication Date: 2019-03-22
TSINGHUA UNIV
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Problems solved by technology

Although the generated liquid silicon dioxide can reside inside the surface microstructure in a short period of time, the laser etching used in the process of making the surface microstructure in the method mentioned in the above-mentioned patent documents is easy to damage the matrix material itself, so long-term Under ablative conditions, it is possible to aggravate the ablation degree of the material

Method used

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  • A method for improving the anti-oxidative ablation performance of materials based on surface microstructure modification
  • A method for improving the anti-oxidative ablation performance of materials based on surface microstructure modification
  • A method for improving the anti-oxidative ablation performance of materials based on surface microstructure modification

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Embodiment Construction

[0032] The present invention will be further elaborated below through specific embodiments in conjunction with the accompanying drawings.

[0033] A. Polish the surface of the substrate to make the surface of the substrate clean and dry. Put the aqueous solution of aluminum dihydrogen phosphate with a concentration of 75% in a beaker, put it into a vacuum box to evacuate, and extract the gas in the solution. Then the vacuumized aluminum dihydrogen phosphate solution is coated on the substrate surface.

[0034] B. Put the substrate coated with aluminum dihydrogen phosphate into a vacuum heating oven and dry it at 35°C-45°C until the liquid evaporates completely, and the aluminum dihydrogen phosphate becomes solid and sticks to the surface of the substrate. At this point, the photoresist is coated on the surface of aluminum dihydrogen phosphate, and the obtained microstructure schematic diagram is as follows figure 1 as shown, figure 1 It includes substrate 1, aluminum dihyd...

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Abstract

The invention discloses a method for improving oxidation ablation resistant performance of a material based on surface micro-structure modifying. The surface of the matrix material is coated with aluminium dihydrogen phosphate, and then the specific surface micro-structure morphology is formed. The aluminium dihydrogen phosphate structure has strong adhesivity with the matrix material and has the characteristics of high temperature resistance, vibration resistance, peeling resistance, high-temperature air flow scour resistance and the like. Flowing of liquid reactants on the surface can be obstructed effectively under high-temperature and high-speed air flows, and accordingly the oxidation ablation resistant performance of a matrix is improved.

Description

technical field [0001] The invention relates to a method for preparing a surface topology structure for improving the anti-oxidation and ablation performance of materials, and belongs to the fields of engineering materials, structural deformation and mechanical experiments. Background technique [0002] When a high-speed aircraft enters the atmosphere, the front edge of the aircraft, the surface of the fuselage, and the air will interact violently, creating a high-temperature environment. The surface of the high-speed aircraft will be oxidized and ablated at high temperatures, which will affect the aerodynamic force of the aircraft and induce a series of problems, endangering the high-speed aircraft. flight safety. In addition, the interior of the aerospace engine, such as the blades of the aero-engine, will also generate a high-temperature environment during operation, which will ablate the blades of the aero-engine, affect the normal operation of the aero-engine, and then ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C26/00
CPCC23C26/00
Inventor 冯雪朱相宇方旭飞张迎超屈哲张长兴
Owner TSINGHUA UNIV
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