Microstructure and Tribological Behavior of a TiO2/hBN Composite Ceramic Coating Formed via Micro-arc Oxidation of Ti–6Al–4V Alloy

Micro arc oxidation (MAO) is a relatively new method of surface treatments which has been used to improve the mechanical and tribological behavior of light metals. Due to the ceramic coating generated by MAO, light metals can be used more widely. The fundamental of MAO and the influence factors of MAO process are discussed here. The surface characteristics of aluminum, titanium, magnesium, Zirconium and stainless steels have been improved by MAO. Scanning electron microscopy (SEM) with energy dispersive X-ray analysis (EDS) were used to study the surface morphology and the elemental composition of the MAO coating. The EDS analysis of the coating shows the elements in the electrolyte and oxygen have incorporated into the coating.

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Characterization and thermal shock behavior of composite ceramic coating doped with ZrO2 particles on TC4 by micro-arc oxidation

Applied Surface Science ◽

10.1016/j.apsusc.2014.05.031 ◽

2014 ◽

Vol 311 ◽

pp. 158-163 ◽

Cited By ~ 21

Author(s):

Yesheng Zhong ◽

Liping Shi ◽

Mingwei Li ◽

Fei He ◽

Xiaodong He

Keyword(s):

Thermal Shock ◽

Ceramic Coating ◽

Composite Ceramic ◽

Micro Arc Oxidation ◽

Thermal Shock Behavior

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Effects of single pulse energy on the properties of ceramic coating prepared by micro-arc oxidation on Ti alloy

Applied Surface Science ◽

10.1016/j.apsusc.2014.10.145 ◽

2015 ◽

Vol 324 ◽

pp. 405-413 ◽

Cited By ~ 23

Author(s):

Jun-Hua Wang ◽

Jin Wang ◽

Yan Lu ◽

Mao-Hua Du ◽

Fu-Zhu Han

Keyword(s):

Pulse Energy ◽

Ceramic Coating ◽

Single Pulse ◽

Ti Alloy ◽

Single Pulse Energy ◽

Micro Arc Oxidation

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Variable Parameter Processes of Micro-Arc Oxidation for Aluminium Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.704-705.1273 ◽

2011 ◽

Vol 704-705 ◽

pp. 1273-1278

Author(s):

Cheng Gao ◽

Jin Yong Xu ◽

Xuan Yi Shi ◽

Ya Juan Liu ◽

Jing Chun Zhang ◽

...

Keyword(s):

Growth Rate ◽

Wear Rate ◽

Ceramic Coating ◽

Early Stage ◽

Variable Parameter ◽

Ceramic Coatings ◽

Constant Current ◽

Constant Voltage ◽

Micro Arc Oxidation ◽

The Way

In micro-arc oxidation process, ceramic coating had a rapid growth all along by the way of constant current oxidation, and ceramic coating had a low roughness by the way of constant voltage oxidation. But few research focus on the mixed control process of constant current oxidation and constant voltage oxidation. In this paper we propose a variable parameter process that can combine the advantages of constant current and constant voltage oxidation for the first time. The growth kinetics of different technics was analyzed according to the change law of current and voltage. Surface topographs of ceramic coating were observed using scanning electron microscopy (SEM). The friction tests were carried out using a self-made friction tester. The results show that ceramic coating has an upper growth rate and a low roughness by the process of constant current+constant voltage oxidation. The ceramic coating has a high growth rate by process of constant voltage+constant current oxidation. The results of friction test indicate that the wear rate and roughness of ceramic coating are positive correlation at early stage of friction. While the ceramic coatings treated by different technics have the close wear rate at stable friction stage, which embodies the inner layer of ceramic coating has a well antiwear behavior.

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