等离子喷涂-物理气相沉积高温防护涂层研究进展

Research Progress of High Temperature Protective Coatings by Plasma Spray-Physical Vapor Deposition

等离子喷涂-物理气相沉积(PS-PVD)是基于低压等离子喷涂发展起来的一种新型多功能薄膜及涂层制备技术。由于其独特的等离子射流特征,可实现气液固多相涂层沉积,获得非视线沉积。文中首先介绍了国内外PS-PVD技术等离子体数值模拟和在线检测技术的研究现状,其次讨论了PS-PVD羽-柱状结构热障涂层的形成机制及与传统热障涂层在热导率、抗冲蚀等性能方面的差异,阐述了PS-PVD技术制备环境障涂层的研究进展,最后对PS-PVD技术沉积高温防护涂层的优势和存在的问题进行了总结。

Plasma spray-physical vapor deposition （PS-PVD） is a new multifunctional film and coating preparation technology developed based on low pressure plasma spraying, including plasma spray-physical vaper deposition technology, plasma spray-thin film technology and plasma spray-chemical vapor deposition technology. PS-PVD technology fills the gap between traditional physical vapor deposition technology and thermal spray technology, and brings the two technologies together. By varying the spray process parameters, coatings of different structures can be obtained. PS-PVD technology also has non-line- of-sight deposition characteristics, and its unique plasma jet characteristics allow the coating material to evaporate in the jet and deposit the gas phase particles under the jet. The research status of PS-PVD technology at home and abroad was introduced, and the difference between PS-PVD coating and traditional thermal barrier coating and its non-line-of-sight deposition characteristics were discussed. Currently, PS-PVD technology has also been applied to the preparation of environmental barrier coatings, simultaneously in the direction of preparing electrolyte layers for solid oxide fuel cells.