朱小鹏

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:材料科学与工程学院

学科:材料表面工程

办公地点:Room 218, School of Materials Science and Engineering

联系方式:0411-84707254

电子邮箱:xpzhu@dlut.edu.cn

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Microstructural features of EB-PVD thermal barrier coatings irradiated by high-intensity pulsed ion beam

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论文类型:会议论文

发表时间:2008-01-01

收录刊物:EI、CPCI-S

卷号:373-374

页面范围:300-303

关键字:high-intensity pulsed ion beam (HIPIB); electron beam physical vapor deposition (EB-PVD); thermal barrier coatings (TBCs); surface modification

摘要:Thermal barrier coatings (TBCs) fabricated by electron-beam physical-vapor deposition (EB-PVD) were irradiated by high-intensity pulsed ion beam (HIPIB) at an ion current density of 100 A/cm(2) with a shot number of 1-10. Microstructural features of the irradiated EB-PVD TBCs were characterized by using X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM), respectively. All the HIPIB-irradiated EB-PVD TBC surfaces present smooth and densified features. The originated intercolumnar channels growing out to the top-coat surface and nanometer-scale gaps inside each single column were sealed after the remelting of TBC surface induced by HIPIB, resulting in formation of a continuous remelted layer about 1-2 mu m in thickness. The dense remelted layer can work as a barrier against the heat-flow and corrosive gases, and gives the possibility of improving thermal conductivity and oxidation resistance of the HIPIB irradiated EB-PVD TBC.