大气等离子喷涂工艺对纳米结构和传统Yb2SiO5 涂层微观结构的影响

纳米材料由于具有一些独特的效果而表现出了独特的性能，纳米结构稀土硅酸盐被认为是很有前景的环境 障碍涂层 ( EBC ) 材料之一。稀土硅酸盐材料中Yb2SiO5 因其卓越的高温相稳定性、对水蒸气环境的耐久性、低 热导率以及优秀的化学稳定性受到了研究者们的广泛关注。本文研究了大气等离子喷涂工艺 ( APS ) 参数对纳米 结构和传统Yb2SiO5 涂层微观结构的影响，并研究了相同大气等离子喷涂工艺下，纳米结构Yb2SiO5 喂料和传统 Yb2SiO5 喂料对涂层微观结构的影响，分析了APS 制备过程中不同结构喂料对涂层结构影响机制。结果表明：相 同喷涂参数制备的纳米结构Yb2SiO5 涂层孔隙率低于传统Yb2SiO5 涂层，以及纳米结构Yb2SiO5 涂层的铺展性和 融化度均优于传统Yb2SiO5 涂层，表明纳米结构Yb2SiO5 涂层为很有前途的环境障碍涂层之一。

The Influence of the Atmospheric Plasma Spraying Process on the Microstructure of Both Nanostructured and Conventional Yb2SiO5 Coatings

Nanomaterials exhibit unique properties due to some unique effects, and nanostructured rare earth silicates are considered to be one of the promising environmental barrier coatings ( EBC ) materials. Among the rare earth silicate materials, Yb2SiO5 has received much attention from researchers for its excellent hightemperature phase stability, durability to water vapor environments, low thermal conductivity, and excellent chemical stability. In this paper, the effects of atmospheric plasma spraying process ( APS ) parameters on the microstructure of nanostructured and conventional Yb2SiO5 coatings were investigated, and the effects of nanostructured Yb2SiO5 feeding and conventional Yb2SiO5 feeding on the microstructure of the coatings were investigated for the same atmospheric plasma spraying process, and the mechanism of the effect of different structural feeds on the coating structure in the preparation of APS was analyzed. The results show that the porosity of the nanostructured Yb2SiO5 coating prepared with the same spraying parameters is lower than that of the conventional Yb2SiO5 coating, as well as the spreading and melting of the nanostructured Yb2SiO5 coating is better than that of the conventional Yb2SiO5 coating, which suggests that the nanostructured Yb2SiO5 coating is one of the promising environmental barrier coatings.