硅酸盐学报

等离子喷涂沉积Al2O3-SiO2涂层的光学性能

作者：司先锋1 2 马壮1 2 高丽红1 2 王富耻1 2 朱时珍1 2 刘玲1 2 柳彦博1 2

单位：(1. 北京理工大学材料学院北京 100081 2. 冲击材料国家重点实验室北京 100081)

分类号：V254.2

出版年,卷(期):页码：2019,47(2):0-0

DOI：10.14062/j.issn.0454-5648.2019.02.12

摘要：

采用等离子喷涂技术制备Al2O3-SiO2涂层，研究不同喷涂参数下颗粒熔融状态、微观结构、物相组成对涂层光学反射率的影响规律。结果表明：随着等离子喷涂功率的增加，颗粒熔融状态逐渐变得更加充分，Al2O3-SiO2涂层中SiO2部分由晶态向非晶态转变，部分Al2O3和SiO2固相反应生成了Al6Si2O13，新相的产生将使得整个涂层材料体系的相组成更加复杂丰富，相界面增多，有利于涂层光学性能的提高。此外，在涂层的内部，层状结构的形成和孔隙率的增加均有益于涂层光学性能的提高。因此，粉末的熔融状态、涂层的微观结构和物相组成的优化对提高Al2O3-SiO2涂层的光学性能提供了可能。

Al2O3-SiO2 coatings were prepared by plasma spraying at different process parameters. The influences of particle melting state, microstructure and phase composition on the optical reflectivity of the coatings prepared at different spraying parameters were investigated. The results show that melting state of the particles becomes more complete when the plasma spraying power increases. The SiO2 of Al2O3-SiO2 coating changes from amorphous to crystalline, and the solid phase reaction of some Al2O3 and SiO2 generates Al6Si2O13. The formation of the new phase can make the phase composition of the whole coating system more complex and rich in phase interface. The increase of phase interface is beneficial to the improvement of optical properties of coatings. In addition, the formation of the layered structure and the increase of the porosity in the interior of the coating both are beneficial to the improvement of the optical properties of the coating. It is thus possible to improve the optical properties of Al2O3-SiO2 coating via the optimization of the melting state, microstructure and phase composition of the powder.

基金项目：

国家自然科学基金(51772027)。

作者简介：

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