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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 L(郝丽); Li G(李光); Xia Y(夏原)
Source: APPLIED SURFACE SCIENCE
Issued Date: 2018-02-15
Volume: 431, Pages:13-16
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: Plasma electrolytic oxidation ; Discharge channel ; Schematic model ; Ti tracer
Language: 英语
Indexed Type: SCI ; EI
DOI: 10.1016/j.apsusc.2017.07.281
DOC Type: Article
WOS Subject: Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
WOS Subject Extended: Chemistry ; Materials Science ; Physics
WOS Keyword Plus: ALLOY ; PEO ; ALUMINUM
WOS ID: WOS:000416964200004
ISSN: 0169-4332
Funder: International Science & Technology Cooperation Program of China(2014DFG51240) ; Chinese Academy of Sciences(XDB22040503)
Classification: 一类
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/72230
Appears in Collections:先进制造工艺力学重点实验室_期刊论文

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Recommended Citation:
Gao FY,Hao L,Li G,et al. The plasma electrolytic oxidation micro-discharge channel model and its microstructure characteristic based on Ti tracer[J]. APPLIED SURFACE SCIENCE,2018-02-15,431:13-16.
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