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Surface-modified CeO2 coating with excellent thermal shock resistance performance and low infrared emissivity at high-temperature

机译:表面改性的CEO2涂层具有优异的热抗冲击性能和高温的低红外发射率

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摘要

The CeO2 filler modified by different content (0, 1, 5 and 10 wt%) of polyethylene glycol (PEG) 400 and the inorganic silicate binder were introduced for preparation of coatings with excellent thermal shock resistance performance and low infrared emissivity at high-temperature. The influences of PEG 400 content on phase structure and morphology of CeO2 powders, and hence on thermal shock resistance behavior and high-temperature infrared emissivity of the corresponding coatings were investigated deeply in this work. The results show that the crystal structure of CeO2 remains unchanged after modification of PEG 400. The dispersity of CeO2 particles is improved with content of modifier PEG 400 increasing from 0 wt% to 5 wt% while it gets worse with PEG 400 content further rising to 10 wt%. Thermal shock resistance of the corresponding coatings enhances from 4 cycles to 31 cycles by increasing PEG 400 content from 0 wt% to 5 wt% while diminishes significantly to 1 cycle with PEG 400 content of 10 wt%. Simultaneously, the minimum emissivity of 0.348 is achieved at 600 degrees C in the coating with 5 wt% of PEG 400. The results suggest that the coating with CeO2 modified by 5 wt% of PEG 400 is a promising candidate for high-temperature infrared stealth due to both excellent thermal shock resistance and low infrared emissivity at high temperature.
机译:引入由不同含量(0,1,5和10wt%)的聚乙二醇(PEG)400和无机硅酸盐粘合剂改性的CEO2填料用于制备具有优异的热防震性能和高温的低红外发射率的涂层。 PEG 400含量对CeO2粉末相相结构及形态的影响,并因此深入研究了相应涂层的热抗冲击性和高温红外发射率。结果表明,在PEG 400的修改后CEO2的晶体结构保持不变。CEO2颗粒的分散性随着改性剂PEG 400的含量从0wt%增加到5wt%而增加,而PEG 400含量进一步升高10 wt%。相应涂层的热抗冲击性通过将PEG 400含量从0wt%含量增加到5wt%,同时用PEG 400含量为10wt%,将PEG 400含量从0wt%含量增加到31次循环。同时,在具有5wt%的PEG 400的涂层中以600℃实现0.348的最小发射率。结果表明,用5wt%的PEG 400修饰的CEO2的涂层是高温红外隐形的有希望的候选者由于高温下具有出色的热抗冲击性和低红外发射率。

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