热障涂层技术是现代国防尖端技术领域中最重要的技术之一。具有大量气相沉积的准柱状结构陶瓷层的热障涂层因其良好的热服役性能，已成为下一代高性能热障涂层结构的广泛共识。目前使用的低压等离子物理气相沉积和电子束物理气相沉积都必须采用超大功率的热源，并在低压舱室内才能获得大量的气相沉积陶瓷涂层。因此目前的制备方法具有较高的成本、偏低的沉积效率和基体几何尺寸限制的特点。本项目提出在大气下利用长度可达1米的新型层流等离子喷涂专利技术为基础，通过研究喷涂过程中YSZ粉末粒子在大气下超长（200mm -1000mm）的加热和加速规律，以及在基体边界层的强化热质传输机制和涂层准柱状结构的连续生长机理。从关键基础问题的机理上深化对新型大气等离子物理气相沉积YSZ涂层方法的认识，掌握准柱状显微结构的调控方法和涂层的热服役性能，为广泛制备低成本高性能热障涂层提供新的解决方案。

Thermal barrier coatings is one of the most important technologies in the modern defense cutting-edge area. Currently, deposition of quasi-columnar structure coating has become a excellent choice for next generation of high-performance thermal barrier coatings. The low pressure plasma spray - physical vapor deposition method and electron beam - physical vapor deposition method must operate in the very low pressure condition and using high output power to deposit mass of quasi-columnar structures. Thus, high cost, low deposition efficiency and geometric size limitation of the substrate exist in these methods. This project proposes a newly developed long laminar plasma spray technology in a length of 1 meter in an atmospheric environment and focuses on the particles heating and motion in a long range from 200 mm to 1000 mm. The intensified heat and mass transfer at the boundary layer of the substrate and growth mechanism of quasi-columnar coatings were investigated. The fundamental deposition mechanism of the atmospheric plasma spray physical vapor deposition method was studied. This project may provide a new deposition method for manufacturing of thermal barrier coatings with a low cost and high-temperature performances.