黄继波,王卫泽.粉末粒径对等离子喷涂YSZ涂层孔隙结构的影响[J].表面技术,2018,47(4):29-34.
HUANG Ji-bo,WANG Wei-ze.Effects of Particle Size on Pore Structure of Plasma-splayed YSZ Coatings[J].Surface Technology,2018,47(4):29-34
粉末粒径对等离子喷涂YSZ涂层孔隙结构的影响
Effects of Particle Size on Pore Structure of Plasma-splayed YSZ Coatings
投稿时间:2017-08-24  修订日期:2018-04-20
DOI:10.16490/j.cnki.issn.1001-3660.2018.04.005
中文关键词:  热障涂层  YSZ  粉末粒径  热循环  孔隙
英文关键词:thermal barrier coatings  YSZ  particle size  thermal cycling  pore
基金项目:国家自然科学基金项目(51775189);上海市科委资助项目(16DZ2260604);航空基金资助项目(2015ZES7001)
作者单位
黄继波 华东理工大学,上海 200237 
王卫泽 华东理工大学,上海 200237 
AuthorInstitution
HUANG Ji-bo East China University of Science and Technology, Shanghai 200237, China 
WANG Wei-ze East China University of Science and Technology, Shanghai 200237, China 
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中文摘要:
      目的 研究粉末粒径对等离子喷涂YSZ涂层孔隙结构的影响。方法 针对两种粒径的YSZ粉末,采用大气等离子喷涂方法制备了热障涂层并进行高温热循环处理。通过定量金相技术,分析两种涂层孔隙结构的差异及其在热循环过程中的演化规律。结果 45~60 μm YSZ粉末制备的涂层的热循环寿命比15~25 μm粉末制备的涂层高40%。两种涂层的孔隙结构具有明显差异。喷涂态时,粗粒径粉末涂层的孔隙率高于细粒径粉末涂层,两种涂层的孔隙朝向特征相似。预热处理后,两种涂层的孔隙率有所降低,然后随着热循环次数的增多又逐渐增大。热循环后,细粒径粉末涂层中,水平朝向的孔隙比例约为涂层总孔隙的三分之二,而粗粒径粉末涂层中则是垂直孔隙的比例高于水平孔隙。涂层中孔隙含量随其朝向角度的累积变化符合S型增长规律。喷涂态涂层的累积曲线形状相似,而热循环后,两种粒径制备的涂层的S型曲线向两个相反的方向偏移。结论 粗粒径YSZ粉末制备的热障涂层抗热循环性能优于细粒径粉末制备的涂层。涂层中孔隙含量随其朝向角度的累积变化曲线的形状,反映了两种粒径制备涂层的孔隙朝向特征的差异。
英文摘要:
      The work aims to study the effect of particle size on the pore structure of plasma-splayed Yttria stabilized Zirconia (YSZ) coatings. Thermal barrier coatings were prepared and treated at high temperature thermal cycle by air plasma spraying for YSZ powder in two particle sizes. The difference between pore structures of two coatings and the evolution during thermal cycle were analyzed by quantitative metallography. The thermal cycle life of the coating prepared by 45~60 μm YSZ powder was 40% higher than that of the coating prepared by 15~25 μm particles. The pore structures on two coatings were obviously different. At spraying state, the porosity of coatings prepared by the coarse YSZ particles was higher than that of coatings prepared by the fine particles, while the orientation features of two pores were similar. After thermal cycling, the proportion of the horizontal pores in the coating prepared by the fine particle powder was about 2/3 of the total pores, while in the proportion of the vertical pores on the coatings prepared by coarse particles was higher than that of the horizontal ones. The change of the cumulative pore content with orientation angle was in conformity with the growth law of S-curve. The shape of accumulation curve was similar for the coatings at spraying state. However, the S-curves of the coatings prepared by the two particle sizes after thermal cycling were shifted in two opposite directions. The thermal shock resistance of the coating prepared by YSZ powder in coarse particle size is better than that of coating prepared by the fine particle size powder. The shape of the accumulation change curve for pore content in coatings as the orientation angle can reflect the difference in the pore orientation of the coatings prepared by two different particle sizes.
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