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A platform for research: civil engineering, architecture and urbanism
Preparation method of high-emissivity coating based on surface toughening of carbon-based ceramic thermal insulation material
The invention relates to a preparation method of a high-emissivity coating based on surface toughening of a carbon-based ceramic thermal insulation material. The temperature resistance of glass powderare remarkably improved by adding aluminum oxide and zirconium oxide into the glass powder, thereby improving the temperature resistance of the coating, two-layer gradient component design is applied: 1) a bottom layer permeates fibers into an inner layer to form a transition coating which is good in binding property with a carbon-based thermal insulation material and small in expansion deformation at a high temperature, so that the binding force of a surface coating and a matrix is enhanced, and damage caused by inconsistent expansion coefficients of the coating and the matrix material in ahigh-temperature environment is buffered; and 2) the surface layer is a compact antioxidant coating, so that oxygen diffusion channels under a high-temperature condition are effectively prevented, andthe effects of resisting heat flow impact and maintaining structural stability are achieved. The coating provided by the invention has high emissivity, has no obvious defects on the surface, still has excellent heat resistance, oxidation resistance and thermal shock resistance at 1500-1700DEG C, and has important significance for improving the use temperature of the carbon-based thermal insulation material.
本发明涉及一种基于碳基陶瓷隔热材料表面增韧的高发射率涂层的制备方法，通过在玻璃粉中添加氧化铝和氧化锆成分显著提升玻璃粉的耐温性，从而提升涂层的耐温性，并运用2层梯度化组分设计：1)底层渗入纤维在内层形成与碳基隔热材料结合性好，高温下膨胀变形小的的过渡涂层，加强表面涂层与基体结合力，缓冲高温环境下涂层与基体材料膨胀系数不一致造成的破坏；2)表层为致密抗氧化涂层，有效阻止高温条件下氧气的扩散通道，并兼具抵抗热流冲击保持结构稳定性的作用。本发明的涂层具备高发射率，涂层表面无明显缺陷，在1500‑1700℃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提升有重要意义。
Preparation method of high-emissivity coating based on surface toughening of carbon-based ceramic thermal insulation material
The invention relates to a preparation method of a high-emissivity coating based on surface toughening of a carbon-based ceramic thermal insulation material. The temperature resistance of glass powderare remarkably improved by adding aluminum oxide and zirconium oxide into the glass powder, thereby improving the temperature resistance of the coating, two-layer gradient component design is applied: 1) a bottom layer permeates fibers into an inner layer to form a transition coating which is good in binding property with a carbon-based thermal insulation material and small in expansion deformation at a high temperature, so that the binding force of a surface coating and a matrix is enhanced, and damage caused by inconsistent expansion coefficients of the coating and the matrix material in ahigh-temperature environment is buffered; and 2) the surface layer is a compact antioxidant coating, so that oxygen diffusion channels under a high-temperature condition are effectively prevented, andthe effects of resisting heat flow impact and maintaining structural stability are achieved. The coating provided by the invention has high emissivity, has no obvious defects on the surface, still has excellent heat resistance, oxidation resistance and thermal shock resistance at 1500-1700DEG C, and has important significance for improving the use temperature of the carbon-based thermal insulation material.
本发明涉及一种基于碳基陶瓷隔热材料表面增韧的高发射率涂层的制备方法，通过在玻璃粉中添加氧化铝和氧化锆成分显著提升玻璃粉的耐温性，从而提升涂层的耐温性，并运用2层梯度化组分设计：1)底层渗入纤维在内层形成与碳基隔热材料结合性好，高温下膨胀变形小的的过渡涂层，加强表面涂层与基体结合力，缓冲高温环境下涂层与基体材料膨胀系数不一致造成的破坏；2)表层为致密抗氧化涂层，有效阻止高温条件下氧气的扩散通道，并兼具抵抗热流冲击保持结构稳定性的作用。本发明的涂层具备高发射率，涂层表面无明显缺陷，在1500‑1700℃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提升有重要意义。
Preparation method of high-emissivity coating based on surface toughening of carbon-based ceramic thermal insulation material
一种基于碳基陶瓷隔热材料表面增韧的高发射率涂层的制备方法
GAO YUZHI (author) / LI JIAN (author) / LIU TAO (author) / GUO HUI (author) / WANG MENG (author) / ZHANG FAN (author) / LI WENJING (author) / YANG JIEYING (author) / ZHANG HAO (author) / ZHAO YINGMIN (author)
2021-03-12
Patent
Electronic Resource
Chinese
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