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The plasma electrolytic oxidation micro-discharge channel model and its microstructure characteristic based on Ti tracer
Gao FY(高方圆); Hao, Li; Li G(李光); Xia Y(夏原); Li, G (reprint author), Chinese Acad Sci, Inst Mech, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
2018
会议名称5th Asian International Conference on Heat Treatment and Surface Engineering
会议日期NOV 12-14, 2016
会议地点Hangzhou, PEOPLES R CHINA
会议录名称APPLIED SURFACE SCIENCE
摘要This study focuses on the individual discharge channel of ceramic coating prepared by plasma electrolytic oxidation (PEO), and attempts to reveal the mechanism of breakdown discharge at low voltage. Titanium (Ti) was employed as a substrate with the layer of aluminum deposited on it (aluminized Ti). The shape and microstructure of the discharge channels in PEO coatings were investigated using transmission electron microscope (TEM) and scanning electron microscopy (SEM). A schematic model of the individual discharge channel was proposed based on Ti tracer method. The shape of the discharge channel was mainly cylinder-shaped in the compact coating, with a groove-like oxidation region existed at the coating/substrate interface. In the groove-like oxidation region, the phase composition mainly composed of amorphous and mixed polycrystalline (aluminum titanate and mullite). beta-Al2O3 was found in the ceramic coating. TEM morphology showed that nanometer sized micro channels existed in the ceramic coatings. (C) 2017 Elsevier B.V. All rights reserved.
关键词Alloy Peo Aluminum Plasma Electrolytic Oxidation Discharge Channel Schematic Model Ti Tracer
资助信息This work is financially supported by the International Science & Technology Cooperation Program of China (No. 2014DFG51240) and the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDB22040503).
收录类别CPCI-S ; EI
语种英语
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文献类型会议论文
条目标识符http://dspace.imech.ac.cn/handle/311007/72160
专题先进制造工艺力学重点实验室
通讯作者Li, G (reprint author), Chinese Acad Sci, Inst Mech, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
作者单位1.[Gao, Fangyuan
2.Hao, Li
3.Li, Guang
4.Xia, Yuan] Chinese Acad Sci, Inst Mech, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China
5.[Gao, Fangyuan
6.Hao, Li
7.Li, Guang
8.Xia, Yuan] Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China
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GB/T 7714
Gao FY,Hao, Li,Li G,et al. The plasma electrolytic oxidation micro-discharge channel model and its microstructure characteristic based on Ti tracer[C]. AMSTERDAM:ELSEVIER SCIENCE BV,2018.
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