| 引用本文: | 孟彬,杨青青,孙跃,赫晓东.溶胶浸渗处理对EB-PVD 制备的YSZ电解质涂层的影响[J].材料科学与工艺,2012,20(5):90-94,100.DOI:10.11951/j.issn.1005-0299.20120518. |
| MENG Bin,YANG Qing-qing,SUN Yue,HE Xiao-dong.Effects of sol infiltration treatment on YSZ electrolyte coatings prepared by EB-PVD[J].Materials Science and Technology,2012,20(5):90-94,100.DOI:10.11951/j.issn.1005-0299.20120518. |
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| 摘要: |
| 为探索溶胶浸渗处理对电子束物理气相沉积(EB-PVD)制备8%摩尔比的氧化钇稳定氧化锆(8YSZ)涂层微观结构及性能的影响,采用EB-PVD工艺在沉积速率1 μm/min的条件下制备了8YSZ电解质涂层.制备态涂层的断面表现为疏松的柱状晶结构,导致涂层的气密性差,因此对涂层进行了溶胶浸渗处理,即首先在负压下将涂层浸渗在钇锆的溶胶内,再进行550 ℃保温2 h的热处理.SEM分析表明,溶胶分解产物可以堵塞柱状晶间的孔隙,其渗入涂层的深度可达3 μm.浸渗处理后,涂层的气体扩散系数由未处理态的6.78×10-5 cm4 /(N·s)降低至8次浸渗处理后的6.54×10-6 cm4/(N·s).8次溶胶浸渗处理后涂层的电导率相比处理前提高不超过10%. |
| 关键词: 电子束物理气相沉积 YSZ涂层 溶胶浸渗 气密性 电导率 |
| DOI：10.11951/j.issn.1005-0299.20120518 |
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| 基金项目:国家自然科学基金(青年基金)资助项目(51102123)；教育部博士点新教师基金资助项目(2010531420002)；云南省应用基础研究基金资助项目(2009ZC012M). |
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| Effects of sol infiltration treatment on YSZ electrolyte coatings prepared by EB-PVD |
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MENG Bin1, YANG Qing-qing2, SUN Yue3, HE Xiao-dong3
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1.Faculty of Materials Science & Engineering,Kunming University of Science & Technology,Kunming 650093,China;2.Faculty of Information Engineering & Automation,Kunming University of Science & Technology,Kunming 650093,China;3.Center for Composite Materials,Harbin Institute of Technology,Harbin 150080,China
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| Abstract: |
| To explore the effects of sol infiltration treatment on YSZ electrolyte coatings prepared by electron beam physical vapor deposition(EB-PVD),8YSZ electrolyte coatings were prepared by EB-PVD at a deposition rate of 1 μm/min.Cross-sectional SEM analysis showed that the as-deposited coatings exhibited a loose columnar structure resulting in bad gas tightness.So a sol infiltration treatment was performed by immersing EB-PVD coatings in a zirconium and yttrium sol followed by a heat treatment.SEM analysis demonstrated that the sol could permeate the coatings with an impregnation depth of 3 μm.The intergranular pores and gaps of as-deposited coatings had been stuffed by decomposed products from sol.After infiltration treatment,the coefficient of gas permeability dropped from 6.78×10-5 cm4/(N·s)for as-deposited coating to 6.54×10-6 cm4/(N·s)for the coating after 8 times of infiltration treatment.However,the electrical conductivity of YSZ coating even after 8 times of sol infiltration treatment increased no more than 10% compared to that of as-deposited coating. |
| Key words: EB-PVD YSZ coatings sol infiltration gas tightness electrical conductivity |
