摘要
采用定量分析技术,分析了相同等离子喷涂工艺制备的微米及纳米YSZ热障涂层的孔隙结构,结果表明：纳米涂层的孔隙率低于微米涂层;两涂层的孔隙大小和形状分布规律相似,纳米涂层以直径在1-10μm之间的孔隙含量最多,而微米涂层则以直径大于10μm的孔隙比例最大;纳米YSZ涂层中等轴孔隙含量明显大于微米YSZ涂层。这些结果说明,粉末尺寸对等离子喷涂热障涂层的孔隙结构有着明显的影响。
Pore structure of plasma-sprayed nano-YSZ and micron-YSZ thermal barrier coatings prepared at the same technological parameters were analyzed by quantitative analysis technology.Results show that the porosity of nano-YSZ coating is lower than that of micron-YSZ coating.The size and shape of pores in these two coatings have resemble probability distribution.Pores whose diameter is between 1 μm and 10 μm micrometer have the greatest percentage in nano-YSZ coating.However,pores whose diameter is greater than 10 μm have the greatest percentage in micron-YSZ coating.Percentage of pores with same axes in nano-YSZ coating is greater than that of micron-YSZ coating apparently.These results imply that size of powders have prominent effect on pore structure of plasma-sprayed thermal barrier coatings.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2010年第5期4-7,共4页
Surface Technology
基金
河南省教育厅自然科学基金项目(2008B430003)
河南工程学院博士基金项目(D2007012)资助
关键词
等离子喷涂
热障涂层
孔隙结构
定量分析
plasma spray
thermal barrier coatings
pore structure
quantitative analysis
