个人信息Personal Information
副教授
硕士生导师
性别:男
毕业院校:哈尔滨工业大学
学位:博士
所在单位:材料科学与工程学院
学科:航空宇航制造工程. 飞行器设计. 材料学. 航空航天力学与工程
办公地点:综合实验1号楼201B室
联系方式:gdshi@dlut.edu.cn
电子邮箱:gdshi@dlut.edu.cn
Microstructure and oxidation behavior of NiCoCrAl/YSZ microlaminates produced by EB-PVD
点击次数:
论文类型:期刊论文
发表时间:2011-11-01
发表刊物:MATERIALS CHARACTERIZATION
收录刊物:Scopus、SCIE、EI
卷号:62
期号:11
页面范围:1066-1070
ISSN号:1044-5803
关键字:Microstructure; Oxidation; Metal/ceramic laminates; Physical vapor deposition
摘要:Two NiCoCrAl/ZrO(2)-Y(2)O(3) microlaminates (A and B) were fabricated by electron beam physical vapor deposition, which were different in layer number and metal-layer thickness. The layer number was 20 and 26, respectively. And the metal-layer thickness was 35 and 14 mu m, respectively. The microstructure and isothermal oxidation behavior were investigated. During the exposure in air at 1000 degrees C for 100 h, the t to m phase transformation occurred in the ceramic layers, and oxide scales formed at the surfaces of not only the outer metal-layers but also the internal metal-layers for the microlaminates. The oxidation rate of microlaminate B was greater than that of microlaminate A. Their overall mass gains were significantly dependent on the number and thickness of the metal-layers. The oxidation products were also influenced by metal-layer thickness. Oxide scales of the 35 mu m thick metal-layer microlaminate (A) consisted mainly of alpha-Al(2)O(3) and theta-Al(2)O(3), while the oxidation products of the 14 mu m thick metal-layer microlaminate (B) were the mixture of alpha-Al(2)O(3), theta-Al(2)O(3) and Cr(2)O(3). It was also found that the growth of the oxide scale adjacent to the top YSZ layer was controlled by the oxygen diffusion, and that the growth of the oxide scale adjacent to the internal YSZ layer was controlled by the metal ionic diffusion. (C) 2011 Elsevier Inc. All rights reserved.