Destruction Mechanism of Sustained Arc on Magnesium Alloy Coated by MAO

	Destruction Mechanism of Sustained Arc on Magnesium Alloy Coated by MAO
	Wang Sheng 1,2; Ma Ying1,2 ; Song Chengdi 2; Li Bin1,2 ; Hao Yuan 1,2
	2020-06
发表期刊	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
ISSN	1002185X
卷号	49 期号:6 页码:1970-1976
摘要	In order to avoid the destruction of the film by sustained arc discharge during micro-arc oxidation (MAO), the essence of sustained arc discharge was explored through capturing the discharge phenomenon by a high-speed camera combined with the current and voltage wave form of the load. And then the change of surface and cross-section morphology and the phase composition of the destroyed area were investigated compared with those of the normal coating. Finally, different matches between duty ratio and frequency were used to explore the influence of the electrical parameters on the sustained arc discharge phenomenon. The results show that the surface of the sample exhibits a reciprocating process of arc burning, arc quenching and cooling during micro-arc oxidation. The localized destroyed area of the coating shows a sustained arc discharge phenomenon. The composition, surface, cross-section morphology and element distribution of the local sustained arc discharge region are very different from those of the normal micro-arc oxidation film layer. And the uniformity, compactness and integrity of the film layer is destroyed, which lead to the destruction of the overall uniformity of the film layer, and even cause serious damage to the external size of the sample. The capacitance characteristic of the load causes the arc duration time to be too long while the cooling time of the molten metal oxide is insufficient; the local thermal transmission is insufficient and the heat is concentrated, which is the basic reason of the sustained arc destruction. This destruction cannot be repaired after it occurs; however, it is possible to avoid the occurrence of sustained arc destruction under different treatment voltages by reasonable matching between frequency and the duty ratio. © 2020, Science Press. All right reserved.
关键词	Capacitance Coatings High speed cameras Liquid metals Magnesium alloys Metals Oxidation Capacitance characteristics Cross-section morphology Different treatments Discharge phenomena Electrical parameter Element distribution Reciprocating process Thermal transmission
收录类别	EI ; SCIE
语种	中文
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000552452000020
出版者	Rare Metals Materials and Engineering Press
EI入藏号	20203008979268
EI主题词	Morphology
EI分类号	531.1 Metallurgy - 542.2 Magnesium and Alloys - 701.1 Electricity: Basic Concepts and Phenomena - 742.2 Photographic Equipment - 802.2 Chemical Reactions - 813.2 Coating Materials - 951 Materials Science
来源库	Compendex
分类代码	531.1 Metallurgy - 542.2 Magnesium and Alloys - 701.1 Electricity: Basic Concepts and Phenomena - 742.2 Photographic Equipment - 802.2 Chemical Reactions - 813.2 Coating Materials - 951 Materials Science
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/115401
专题	材料科学与工程学院
通讯作者	Ma Ying
作者单位	1.State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China; 2.Lanzhou Univ Technol, Lanzhou 730050, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
推荐引用方式 GB/T 7714	Wang Sheng,Ma Ying,Song Chengdi,et al. Destruction Mechanism of Sustained Arc on Magnesium Alloy Coated by MAO[J]. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,2020,49(6):1970-1976.
APA	Wang Sheng,Ma Ying,Song Chengdi,Li Bin,&Hao Yuan.(2020).Destruction Mechanism of Sustained Arc on Magnesium Alloy Coated by MAO.Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,49(6),1970-1976.
MLA	Wang Sheng,et al."Destruction Mechanism of Sustained Arc on Magnesium Alloy Coated by MAO".Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering 49.6(2020):1970-1976.