Carbon material wide-temperature-range anti-oxidation anti-scouring multiphase ceramic coating and preparation method thereof

A technology of multiphase ceramics and wide temperature range, which is applied to the wide temperature range anti-oxidation and anti-scouring multiphase ceramic coating of carbon materials and its preparation field, can solve the problem of short anti-oxidation life and temperature range, many coating defects and complex process and other problems, to achieve the effect of low cost, large area and dense coating structure

Active Publication Date: 2021-12-03
沈阳先进涂层材料产业技术研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006]Aiming at the problems of single-phase UHTCs boride composite SiC coating on the surface of existing carbon materials such as short oxidation life and temperature range, many coating defects, complex process and high cost, The invention provides a method for preparing a carbon material wide temperature range anti-oxidation and anti-scouring multi-phase ceramic coating. By controlling the structure and process of the coating prefabricated body channel structure, thickness, carbon content, sintering temperature and time, etc., a compact structure is obtained. Ultra-high temperature ceramic composite coating with controllable thickness, excellent protection performance in wide temperature range, and strong binding force

Method used

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  • Carbon material wide-temperature-range anti-oxidation anti-scouring multiphase ceramic coating and preparation method thereof
  • Carbon material wide-temperature-range anti-oxidation anti-scouring multiphase ceramic coating and preparation method thereof

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preparation example Construction

[0041] A method for preparing a carbon material wide temperature range anti-oxidation and anti-scouring composite ceramic coating, comprising the following preparation steps:

[0042] Step 1. Make the density 1.78-1.82 g / cm 3 The graphite block is cut into a certain size, then polished to remove edges and corners, the treated graphite block is cleaned with deionized water, and then dried for later use to obtain a graphite matrix.

[0043] Step 2, powder SiC, B in turn 4 C, Hf, Zr, and Ta are added to the phenolic resin aqueous solution and mixed to form a slurry, and stirred to form a uniformly dispersed slurry without particle agglomeration.

[0044] Step 3. Immerse the graphite substrate in the stirring slurry for 2~5s, then stop stirring and take out the graphite substrate, put it on the polyurethane foam to dry naturally, put the dried graphite substrate in an oven at 120~180℃ to make the phenolic The resin undergoes a cross-linking reaction, and the reaction time is 15-...

Embodiment 1

[0052] High-strength graphite (with a density of 1.79 g / cm 3 ) was cut into a cube with a side length of 10 mm and a cylinder with a diameter of 18 mm and a height of 10 mm, wherein the cube was the oxidation test sample, and the cylinder was the ablation test sample; the graphite block was polished with 400# silicon carbide sandpaper to remove the corners, Then clean it with deionized water, and dry it in an oven at 150°C for 2 hours;

[0053] Prepare water-soluble phenolic resin and deionized water according to the mass ratio of 1:3 to prepare a phenolic resin solution, and then add B 4 C. Hafnium (Hf), zirconium (Zr), tantalum (Ta) and SiC powders are added to the magnetically stirred phenolic resin solution in sequence, and the mass ratio of the total powder mass to the phenolic resin solution is 6:4 (total powder mass The mass accounts for 60% of the total mass of the slurry), and the molar ratio of hafnium (Hf), zirconium (Zr), tantalum (Ta), and boron carbide is 6:6:8:...

Embodiment 2

[0058] High-strength graphite (with a density of 1.80 g / cm 3 ) was cut into a cube with a side length of 10 mm and a height of 5 mm, and a cylinder with a diameter of 29 mm and a height of 10 mm, wherein the cube was an oxidation test sample, and the cylinder was an ablation test sample; the graphite block was polished with 600# silicon carbide sandpaper , remove the edges and corners, then clean it with deionized water, and dry it in an oven at 150°C for 2 hours;

[0059] Prepare water-soluble phenolic resin and deionized water according to the mass ratio of 2:5 to prepare phenolic resin solution, and then add B 4 C. Hafnium (Hf), zirconium (Zr), tantalum (Ta) and SiC powders were added to the magnetically stirred phenolic resin solution in sequence, the total mass of the powder accounted for 55% of the total mass of the slurry, hafnium (Hf), The molar ratio of zirconium (Zr), tantalum (Ta), and boron carbide is 8:6:6:1.

[0060] Immerse the graphite matrix in the stirred s...

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Abstract

The invention belongs to the technical field of material protection, and particularly relates to a carbon material wide-temperature-range anti-oxidation anti-scouring composite ceramic coating and a preparation method thereof. The (ZrxHf< 1-x-y >Tay) B2-SiC multiphase ceramic coating with wide-temperature-range anti-oxidation and anti-scouring performance is prepared by adopting a reaction sintering method for the first time, the wide-temperature-range protection range is large, oxidation protection which can reach the high temperature of 800 DEG C and can reach 3000 DEG C or above can be provided, and at present, coatings with the wide-temperature-range protection performance are not reported. The method is low in cost and easy to operate, and the coating is compact in structure, controllable in thickness, high in binding force and excellent in thermal shock resistance. A (ZrxHf < 1-x-y > Tay) B2-SiC coating sample can bear oxidation corrosion for more than 1000 hours at the temperature of 800-1200 DEG C, and no weight loss exists; oxidation protection for more than 1200 hours can be provided in an oxidation environment of 1500 DEG C; ablation protection can be provided for at least 300 seconds under plasma high-temperature flames of 3000 DEG C; and after 50 times of thermal shock cycles at the room temperature of 1500 DEG C, the coating has no obvious cracks.

Description

technical field [0001] The invention belongs to the technical field of material protection, and in particular relates to a carbon material wide temperature range anti-oxidation and anti-scouring composite ceramic coating and a preparation method thereof. Background technique [0002] Carbon fiber-reinforced carbon composite materials, graphite materials and other carbon materials have stable high-temperature mechanical properties, low density, and small thermal expansion coefficient. They can be used in aerospace and other fields, such as aircraft nose cones, rocket engine nozzles, and wing leading edges. However, carbon materials are entirely composed of a single carbon element, and their inherent oxygen sensitivity limits the service life and application range. In a high-temperature aerobic environment, carbon materials are extremely prone to weight loss, which will cause irreversible damage to their own mechanical properties. The preparation of anti-oxidation coating on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/89
CPCC04B41/89C04B41/52C04B41/009C04B41/5001C04B41/4539C04B41/0072C04B41/507C04B41/5059C04B41/455C04B35/522
Inventor 沙世强吕会勇崔学强李娜徐秀志于帅郭万元姜岩
Owner 沈阳先进涂层材料产业技术研究院有限公司
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