EFFECTS OF SECOND PHASES ON MICROARC OXIDATION PROCESS OF MAGNESIUM BASE MATERIALS

doi:10.11900/0412.1961.2015.00500

IMR OpenIR

	EFFECTS OF SECOND PHASES ON MICROARC OXIDATION PROCESS OF MAGNESIUM BASE MATERIALS
	Wang Yanqiu 1; Wu Kun 2; Wang Fuhui 1,3
通讯作者	Wang Yanqiu(qiuorwang@hrbeu.edu.cn)
	2016-06-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	52 期号:6 页码:689-697
摘要	The effects of second phases on microarc oxidation (MAO, also named plasma electrolytic oxidation-PEO) behavior of Mg base materials were investigated and the related mechanism was discussed. The formation of barrier layer and its influence on sparking discharge behavior were characterized and analyzed on the base of systematic selecting and designing substrate materials. The variation of second phases at the early MAO stage was observed and analyzed by SEM and EDS, and then the effect mechanism of second phases on MAO behaviors was revealed. Voltage evolution trend during MAO were recorded to study the formation state of the barrier layer on the different Mg base materials. According to the growth mechanism of MAO film, the film growth process can be simplistically considered as a repeated breakdown and reconstruction process of a capacitor. Accordingly, the growth process of MAO film on multiphase metal materials and the effects of second phases were discussed. The results show that different second phases in substrate materials have different effects on formation process of MAO films, depending on their own characteristics. For the second phases which have the characteristics of valve metals, although selective sparking discharge occurs at the early stage of MAO, the second phases will not hinder the growth of MAO film since barrier layer can form on the second phases, and they will not induce structural defects into the film-substrate interface. If the second phases have not the characteristics of valve metals, their conductivity property, will be an important influencing factor to affect the MAO behaviors. For the elecinsulating second phases which have not the characteristics of valve metals, sparking discharge just occurs on Mg matrix in the substrate, while doesn't occur on the second phases; the second phases exist in the MAO film as heterogeneous phases, do not react in MAO process, and will not hinder the growth of MAO film. For the semi-conductive second phases which have not the characteristics of valve metals, they delay the growth of MAO film because they destroy the integrity of barrier layer. For the electroconductive second phases which have not the characteristics of valve metals, they seriously hinder the growth of MAO film.
关键词	magnesium alloy metal matrix composite second phase microarc oxidation barrier layer
资助者	National Natural Science Foundation of China ; International S&T Cooperation Program of China
DOI	10.11900/0412.1961.2015.00500
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51001036] ; International S&T Cooperation Program of China[2014DFR50560]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000377642600006
出版者	SCIENCE PRESS
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/122358
专题	中国科学院金属研究所
通讯作者	Wang Yanqiu
作者单位	1.Harbin Engn Univ, Key Lab Superlight Mat & Surface Technol, Educ Minist, Harbin 150001, Peoples R China 2.Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang Yanqiu,Wu Kun,Wang Fuhui. EFFECTS OF SECOND PHASES ON MICROARC OXIDATION PROCESS OF MAGNESIUM BASE MATERIALS[J]. ACTA METALLURGICA SINICA,2016,52(6):689-697.
APA	Wang Yanqiu,Wu Kun,&Wang Fuhui.(2016).EFFECTS OF SECOND PHASES ON MICROARC OXIDATION PROCESS OF MAGNESIUM BASE MATERIALS.ACTA METALLURGICA SINICA,52(6),689-697.
MLA	Wang Yanqiu,et al."EFFECTS OF SECOND PHASES ON MICROARC OXIDATION PROCESS OF MAGNESIUM BASE MATERIALS".ACTA METALLURGICA SINICA 52.6(2016):689-697.