Characterization of self-sealing MAO ceramic coatings with green or black color on an Al alloy

The hardness and wear resistance of micro arc oxidation (MAO) ceramic coatings were influenced by phase compositions, surface thickness, porosity and microcracks. In this work, ceramic coatings with enhanced microhardness and friction resistance were fabricated on 6061 Al-alloy by increasing thickness and decreasing porosity through adding sodium hexametaphosphate ((NaPO3)6) as additive in silicate-based electrolyte. Surface morphologies and microhardness of the as-fabricated MAO coatings were evaluated using scanning electron microscope (SEM) and thickness meter. As a binary additive, the addition of (NaPO3)6 in electrolytes can obviously change the surface morphologies, thickness and microhardness of the resultant MAO coatings.

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Evolution of residual stresses in micro-arc oxidation ceramic coatings on 6061 Al alloy

Chinese Journal of Mechanical Engineering ◽

10.3901/cjme.2013.06.1149 ◽

2013 ◽

Vol 26 (6) ◽

pp. 1149-1153 ◽

Cited By ~ 6

Author(s):

Dejiu Shen ◽

Jingrui Cai ◽

Changhong Guo ◽

Peiyu Liu

Keyword(s):

Residual Stresses ◽

Ceramic Coatings ◽

Al Alloy ◽

Micro Arc Oxidation ◽

6061 Al Alloy

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Characterization of ZrO2 ceramic coatings on ZrH1.8 prepared in different electrolytes by micro-arc oxidation

Rare Metals ◽

10.1007/s12598-015-0503-8 ◽

2015 ◽

Cited By ~ 1

Author(s):

Zhi-Gang Wang ◽

Wei-Dong Chen ◽

Shu-Fang Yan ◽

Xiu-Juan Fan ◽

Zhi-Gao Xu

Keyword(s):

Ceramic Coatings ◽

Micro Arc Oxidation

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Characterization of Al2O3 ceramic coatings on 6063 aluminum alloy prepared in borate electrolytes by micro-arc oxidation

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2007.08.046 ◽

2008 ◽

Vol 462 (1-2) ◽

pp. 99-102 ◽

Cited By ~ 71

Author(s):

H.X. Li ◽

V.S. Rudnev ◽

X.H. Zheng ◽

T.P. Yarovaya ◽

R.G. Song

Keyword(s):

Aluminum Alloy ◽

Ceramic Coatings ◽

Al2o3 Ceramic ◽

Micro Arc Oxidation ◽

6063 Aluminum Alloy

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Structure and Property of Micro Arc Oxidation Ceramic Coatings on Al Alloy in K2ZrF6 Solution

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.105-106.505 ◽

2010 ◽

Vol 105-106 ◽

pp. 505-508 ◽

Cited By ~ 3

Author(s):

Zhen Dong Wu ◽

Zhong Wen Yao ◽

Fang Zhou Jia ◽

Zhao Hua Jiang

Keyword(s):

Wear Resistance ◽

Corrosion Resistance ◽

Aluminium Alloy ◽

Friction And Wear ◽

Ceramic Coatings ◽

Al Alloy ◽

Structure And Property ◽

Micro Arc Oxidation ◽

Disk Friction ◽

Composition Structure

The coatings containing zirconia were produced on LY12 Aluminium alloy by micro-arc oxidation in K2ZrF6 and NaH2PO2 solution. The composition, structure, hardness, friction and wear resistance and corrosion resistance of the coating were studied by XRD, SEM, EDS, ball-on-disk friction tester and electrochemical analyzer, respectively. The results show that coating was composed of m-ZrO2 and t-ZrO2. There were a large amount of Zr and O and a little Al, P and K in the coating. The thickness of coating prepared for 3h was 168μm and the maximum value of the hardness was up to 16.75GPa. The friction and wear resistance and corrosion resistance were improved, compared with the LY12 aluminium alloy substrate.

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Characterization of Ceramic Coatings on ZL114 Aluminum Alloy Prepared in Alkaline Electrolyte Adding Nano-Al2O3 by Micro-Arc Oxidation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.418-420.804 ◽

2011 ◽

Vol 418-420 ◽

pp. 804-807 ◽

Cited By ~ 1

Author(s):

Jun Zhao ◽

Jian Jun Xi

Keyword(s):

Aluminum Alloy ◽

Surface Properties ◽

Alkaline Solution ◽

Ceramic Coatings ◽

Alkaline Electrolyte ◽

Corrosion Performance ◽

Micro Arc Oxidation

ZL114 aluminum alloy samples were treated by micro-arc oxidation using alkaline solution added different amount of nano-Al2O3to improve the surface properties. Effects of the additives were investigated by thickness, hardness, morphologies and corrosion performance. The results indicated that proper amount of nano-Al2O3had certain contribution with higher corrosion performance. And adding too much nano-Al2O3decreased the property of ceramic coatings.

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