等离子喷涂纳米ZrO2功能梯度热障涂层的孔隙结构
Pore Structure of the Plasma Sprayed Nanostructured ZrO2 Gradient Thermal Barrier Coating
摘 要
采用大气等离子喷涂技术制备了纳米ZrO2功能梯度热障涂层,采用定量金相分析技术分别研究了表面陶瓷层、中间层及界面处的孔隙率、孔隙尺寸和孔隙形状.结果表明:各区域的孔隙率、孔隙尺寸和孔隙形状系数服从各自相似的概率分布;界面处孔隙率最高为6.87%,表面陶瓷层和中间层孔隙率略低;涂层中尺寸在1 μm以下的孔隙数量最多,约占65%;孔隙大多呈等轴状,所占比例在70%~73%之间.
梯度热障涂层
孔隙率
孔隙尺寸
plasma spraying
gradient thermal barrier coating
porosity
pore size
Abstract
Nanostructured ZrO2 functional gradient thermal barrier coating was prepared by air plasma spraying technology. The porosity,size and shape of the pores in the ceramic layer,intermediate layer and interface between ceramic layer and intermediate layer were analyzed by quantitative analysis technology. The results show that the pores possessed the same microstructure characteristics in the ceramic layer,intermediate layer and interface. The cumulative probability of the porosity,the pore size and the pore shape showed similar distribution in different layers. The greatest porosity appeared in the interface between ceramic layer and intermediate layer,being about 6.87%. Most of the pores size in the coating was smaller than 1 μm(about 65%),and showed equiaxial shape (with the content of 70%-73%).
中图分类号 TQ174
所属栏目 材料性能及其应用
基金项目 河南工程学院博士基金资助项目(D200712)
收稿日期 2008/4/10
修改稿日期 2008/9/19
网络出版日期
作者单位点击查看
备注李振军(1964-),男,河南新密人,副教授,硕士.
引用该论文: LI Zhen-jun,ZHANG Hong-song,WEI Yuan,CHEN Xiao-ge. Pore Structure of the Plasma Sprayed Nanostructured ZrO2 Gradient Thermal Barrier Coating[J]. Materials for mechancial engineering, 2009, 33(4): 85～88
李振军,张红松,魏媛,陈晓鸽. 等离子喷涂纳米ZrO2功能梯度热障涂层的孔隙结构[J]. 机械工程材料, 2009, 33(4): 85～88
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【12】FRIIS M,PERSSON C,WIGREN J. Influence of particle in-flight characteristics on the microstructure of atmospheric plasma sprayed yttria stabilized ZrO2[J].Surface and Coa-tings Technology,2001,141(2/3):115-127.
【13】朱春润,索科洛夫.成都粘土孔隙性的微观结构[J].地质灾害与环境保护,1994,8(5):37-47.
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