发射率
材料科学
结晶度
微观结构
红外线的
低发射率
硅酸盐
涂层
球磨机
复合材料
热稳定性
化学工程
光学
物理
工程类
作者
Bo Zhang,Guoyue Xu,Chuyang Liu,Shujuan Tan,Chunjian Xu,Yanting Zhang,Jianchao Zhang
标识
DOI:10.1016/j.infrared.2018.06.008
摘要
Low infrared emissivity coatings with good heat-resistant property are prepared by using Cr39Ni7C powders and inorganic silicate as filler and binder, respectively. The effects of ball-milling time and heating temperatures on both the microstructure and crystallinity of Cr39Ni7C powders as well as the infrared emissivity of the coatings are detailedly explored. The results show that large spherical Cr39Ni7C particles change into smaller flakey particles gradually with ball-milling time extending to 70 h. Meanwhile, crystallinity of Cr39Ni7C powders enhances with temperature increasing from 300 °C to 700 °C. Contributed by the small flakey particles and enhanced crystallinity, the Cr39Ni7C coating could possess low emissivity value of 0.59 at room temperature, and it further reduces to 0.55 with the temperature rising up to 600 °C. Additionally, good thermal stability is obtained due to the SiOSi space network structure and the SiOM bonding between the coatings and substrates.
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