大气等离子体喷涂的单片层研究进展

大气等离子体喷涂技术是一种常用的涂层制备工艺。作为所制备涂层的结构基元, 单片层的形貌特征及堆叠行为决定了涂层的微结构, 对涂层性能产生显著影响。本文较为系统地综述了与熔滴自身理化状态相关的主体因素、与沉积涂层的衬底相关的客体因素以及环境因素等对单片层形成过程的影响, 着重分析了粉体尺寸、衬底预热过程等产生的多种不同影响及其之间的关联性, 并通过对所述文献涉及实验方法各自特点的比较, 提出未来的实验和模拟研究或都将向着与真实生产条件更加接近的方向发展。

Research Progresses of Atmospheric Plasma Sprayed Splat

Atmospheric plasma spraying (APS) is a well-established method to fabricate coatings. Since the coatings are piled up with splat, the morphology of splats is of significant importance for the microstructure and performance of coatings deposited by APS. In the current review, the influences of parameters in spraying processes on formation of splats were divided into three categories, namely the droplet-related factors, substrate-related factors and environmental-related factors. The influence of above mentioned factors on morphology of splats were systematically introduced. Among them, effect of powder size and substrates preheating were emphatically discussed. Future research direction was also pointed out based on the reviewed literature in this paper.