Ultrahigh-temperature-resistant, heat-insulating and antioxidant ceramic coating

A ceramic coating, anti-oxidation technology, applied in the field of ceramic coating, can solve the problems of ultra-high temperature resistance, thermal insulation and thermal insulation performance to be further improved, etc., achieve excellent thermal shock cycle life, improve high temperature resistance and thermal insulation performance, The effect of high temperature resistance and fracture toughness improvement

Active Publication Date: 2022-03-01
广东极客亮技术有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] Although the above patent documents have prepared inorganic coatings with certain heat resistance properties, the ultra-high temperature resistance, heat insulation and heat preservation properties need to be further improved

Method used

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Examples

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preparation example Construction

[0038] The preparation method of silica coated silicon carbide composite microspheres includes:

[0039] S1. Preparation of olerate cellulose in butyrates in silicon carbide nanoparticles;

[0040] S2. The product obtained by step S1 is dispersed in an aqueous solution, warmed to 40-60 ° C, then orthosoricate and ethyl acetate, and adjust the pH to 10.5-11.5 reaction for 5-10 h, then centrifugation;

[0041] S3. Disperse the product obtained by step S2 in ethanol solution of ammonium nitrate, 80 ° C refluxed for 6 h, remove ethyl acetate, to obtain a mesoporous silica layer;

[0042] S4. The product obtained by step S3 is dispersed in acetone solvent, heat reflux for 6 h, removes buterate butyrate cellulose, to obtain a hollow structure layer, and finally obtains silica coated silicon carbide composite microspheres having a cavity structure.

[0043] Preparation method for ultra-high temperature insulation antioxidant ceramic coating is: 30-50 parts of tantalum carbide, 20-35 copi...

Embodiment 1

[0046] A high temperature insulation antioxidant ceramic coating, a preparation method is: 38 parts of tantalum carbide according to weight, 23 copies of carbonide, 16 carbide, and 15 silica coated silicon carbide composite microspheres. 6 parts of zirconium dioxide and 2 boron nitride, mixed ball milling to obtain a mixed powder; mixed with anhydrous ethanol in mass than 1.5: 1, then applied to stainless steel metal surface, baked at 200 ° C for 1 h It is obtained to obtain a high temperature insulation antioxidant ceramic coating.

[0047] The preparation method of silica coated silicon carbide composite microspheres is roughly: dispersion of silicon carbide nanoparticles in a mixed solution of water and ethanol, warmed to 60 ° C, then orthosilicate, adjusting pH to 10.5 -11.5 Reaction 8 h, centrifugation was separated and dried to give silica coated silicon carbide composite microspheres.

Embodiment 2

[0049] A resistance to ultra-high temperature insulating antioxidant ceramic coating, which is compared to Example 1, and the raw material components include: 40 parts of carbon tantalum, 24 parts of carbonide, 18 parts of titanium carbide, and dioxide. Silicon-coated silicon carbide composite microspheres, 6 parts of zirconia and 2 boron nitride. Others are the same as that of Example 1, and details are not described herein.

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Abstract

The invention provides an ultrahigh-temperature-resistant heat-insulating antioxidant ceramic coating. The ultrahigh-temperature-resistant heat-insulating antioxidant ceramic coating is prepared from the following raw materials in parts by weight: 30-40 parts of tantalum carbide, 20-30 parts of hafnium carbide, 15-22 parts of titanium carbide, 10-18 parts of silicon dioxide coated silicon carbide composite microspheres, 5-12 parts of zirconium dioxide and 1-5 parts of boron nitride. The silicon dioxide coated silicon carbide composite microsphere comprises a porous structure layer or a cavity structure layer. All the raw material components are dispersed in ethyl alcohol, the surface of a metal or fiber base material is coated with the mixture, baking is conducted for 1 h at the temperature of 180 DEG C to 220 DEG C, and the ultra-high-temperature-resistant, heat-insulation and anti-oxidation ceramic coating is obtained. By adding a proper amount of silicon dioxide coated silicon carbide composite microspheres into the raw material components and improving the structure of the silicon dioxide coated silicon carbide composite microspheres, the high temperature resistance and heat insulation performance of the ceramic coating are remarkably improved, and the ceramic coating is suitable for industrial production and has the characteristics of no toxicity and no pollution.

Description

Technical field [0001] The present invention relates to the field of ceramic coating techniques, and more particularly to ultra-high temperature insulating antioxidant ceramic coatings. Background technique [0002] With the development of aerospace technology and the improvement of the level of cutting-edge weapons, it is increasingly harsh. For example, the high ultrasound weapon system faces a harsh aerodynamic heating phenomenon and a gas thermal environment, temperature can exceed 2000 ° C, heat flow above 10 mW / m 2 New, higher requirements for the performance and preparation technology of thermal protection materials. Ultra-high-speed aircraft is high temperature and anti-oxidation is the key, especially 5 Mach, the aircraft through the atmosphere, more than 2000 degrees, such as the peak speed of 7500km / h, about 6MPa, front end withstand 120kPa pneumatic pressure, about 2000K high temperature, the whole seal The control system, the fuel storage needs to consider temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/622C04B35/628
CPCC04B35/5607C04B35/62222C04B35/62807C04B35/62886C04B2235/3839C04B2235/3843C04B2235/3826C04B2235/3244C04B2235/386C04B2235/9684C04B2235/9607C04B2235/96Y02T50/40
Inventor 曾伟荣曾伟城
Owner 广东极客亮技术有限公司
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