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Title:
The plasma electrolytic oxidation micro-discharge channel model and its microstructure characteristic based on Ti tracer
Author: Gao FY(高方圆); Hao, Li; Li G(李光); Xia Y(夏原)
Issued Date: 2018
Conference Name: 5th Asian International Conference on Heat Treatment and Surface Engineering
Conference Date: NOV 12-14, 2016
Conference Place: Hangzhou, PEOPLES R CHINA
Abstract: 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.
Keyword: ALLOY ; PEO ; ALUMINUM ; Plasma electrolytic oxidation ; Discharge channel ; Schematic model ; Ti tracer
Indexed Type: CPCI-S ; EI
Corresponding Author: Li, G (reprint author), Chinese Acad Sci, Inst Mech, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
Sponsorship: 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).
Source: APPLIED SURFACE SCIENCE
Publisher: ELSEVIER SCIENCE BV
Publish Place: AMSTERDAM
Language: 英语
WOS ID: WOS:000416964200004
Citation statistics:
Content Type: 会议论文
URI: http://dspace.imech.ac.cn/handle/311007/72160
Appears in Collections:先进制造工艺力学重点实验室_会议论文

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description.institution: 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

Recommended Citation:
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]. 见:5th Asian International Conference on Heat Treatment and Surface Engineering. Hangzhou, PEOPLES R CHINA. NOV 12-14, 2016
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