Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-emissivity surface toughening coating and preparation method thereof
The invention relates to a high-emissivity surface toughening coating and a preparation method thereof. The coating with the characteristics of oxidation resistance and high emissivity is prepared on the surface of a porous fibrous carbon-based thermal insulation material by combining a slurry coating method and a thermal treatment method in an inert atmosphere. According to the method, a uniform silicon dioxide shell layer is prepared on the surface of the high-emissivity powder, so that the wettability of the silicon dioxide shell layer and a glass phase is improved, the coating can form a compact coating under a relatively low-temperature inert atmosphere, and the influence of an air atmosphere coating sintering process on the mechanical property of a carbon-based thermal insulation material matrix is remarkably reduced; and the surface coating is kept to resist heat flow impact and keep the structural stability. And the silicon dioxide shell layer has no obvious influence on the emissivity of the coating. The room temperature emissivity of the coating in the wavelength range of 0.3-2.5 is larger than 0.9. The surface of the coating is free of obvious defects, and the coating still has excellent heat protection performance, oxidation resistance and thermal shock resistance at the high temperature of 1500-1800 DEG C, and has important significance for increasing the use temperature of the carbon-based thermal insulation material.
本发明涉及一种高发射率表面增韧涂层及其制备方法，结合浆料涂敷和惰性气氛下热处理的方法在多孔纤维状碳基隔热材料表面制备兼具抗氧化和高发射率特性的涂层。该方法在高发射率粉体表面制备均匀的二氧化硅壳层，提升其与玻璃相的浸润性，使涂料可在较低温度惰性气氛下形成致密涂层，显著降低空气气氛涂层烧结过程对碳基隔热材料基体力学性能的影响，并保持表面涂层抵抗热流冲击保持结构稳定性的作用。二氧化硅壳层对涂层发射率无显著影响。涂层在0.3‑2.5波长范围内室温发射率大于0.9。涂层表面无明显缺陷，在高达1500‑1800℃高温下仍具有优异的防热性能和抗氧化性、抗热震性能，对于提升碳基隔热材料的使用温度有重要意义。
High-emissivity surface toughening coating and preparation method thereof
The invention relates to a high-emissivity surface toughening coating and a preparation method thereof. The coating with the characteristics of oxidation resistance and high emissivity is prepared on the surface of a porous fibrous carbon-based thermal insulation material by combining a slurry coating method and a thermal treatment method in an inert atmosphere. According to the method, a uniform silicon dioxide shell layer is prepared on the surface of the high-emissivity powder, so that the wettability of the silicon dioxide shell layer and a glass phase is improved, the coating can form a compact coating under a relatively low-temperature inert atmosphere, and the influence of an air atmosphere coating sintering process on the mechanical property of a carbon-based thermal insulation material matrix is remarkably reduced; and the surface coating is kept to resist heat flow impact and keep the structural stability. And the silicon dioxide shell layer has no obvious influence on the emissivity of the coating. The room temperature emissivity of the coating in the wavelength range of 0.3-2.5 is larger than 0.9. The surface of the coating is free of obvious defects, and the coating still has excellent heat protection performance, oxidation resistance and thermal shock resistance at the high temperature of 1500-1800 DEG C, and has important significance for increasing the use temperature of the carbon-based thermal insulation material.
本发明涉及一种高发射率表面增韧涂层及其制备方法，结合浆料涂敷和惰性气氛下热处理的方法在多孔纤维状碳基隔热材料表面制备兼具抗氧化和高发射率特性的涂层。该方法在高发射率粉体表面制备均匀的二氧化硅壳层，提升其与玻璃相的浸润性，使涂料可在较低温度惰性气氛下形成致密涂层，显著降低空气气氛涂层烧结过程对碳基隔热材料基体力学性能的影响，并保持表面涂层抵抗热流冲击保持结构稳定性的作用。二氧化硅壳层对涂层发射率无显著影响。涂层在0.3‑2.5波长范围内室温发射率大于0.9。涂层表面无明显缺陷，在高达1500‑1800℃高温下仍具有优异的防热性能和抗氧化性、抗热震性能，对于提升碳基隔热材料的使用温度有重要意义。
High-emissivity surface toughening coating and preparation method thereof
一种高发射率表面增韧涂层及其制备方法
GAO YUZHI (Autor:in) / LI JIAN (Autor:in) / LIU TAO (Autor:in) / GUO HUI (Autor:in) / KONG DELONG (Autor:in) / ZHANG FAN (Autor:in) / LI WENJING (Autor:in) / LIU YUANYUAN (Autor:in) / ZHANG HAO (Autor:in)
01.03.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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