scholarly journals Preparation and characterization of the micro-arc oxidation composite coatings on magnesium alloys

2014 ◽  
Vol 2 (4) ◽  
pp. 309-316 ◽  
Author(s):  
Yanfeng Ge ◽  
Bailing Jiang ◽  
Ming Liu ◽  
Congjie Wang ◽  
Wenning Shen
Keyword(s):  
Magnesium Alloys ◽  
Composite Coatings ◽  
Micro Arc Oxidation

Preparation and Characterization of Zn-Containing Hydroxyapatite/TiO2 Composite Coatings on Ti Alloys

2011 ◽  
Vol 685 ◽  
pp. 367-370 ◽  
Author(s):  
Min Qi ◽  
Da Yi Yang ◽  
Jing Ying Zhang ◽  
Hong Jun Ai
Keyword(s):  
Adhesion Strength ◽  
Composite Coatings ◽  
Energy Dispersive Spectrometer ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Zn Content ◽  
Micro Arc Oxidation ◽  
Gel Technique ◽  
Bacteria Resistance

In order to improve the osteoblast growth and bacteria resistance, Zn-containing hydroxyapatite (Zn-HA) and titanium oxide (TiO2) composite coatings were prepared to improve binding between coating and Ti substrate. TiO2 film was prepared on the surface of Ti by micro-arc oxidation (MAO) and Zn-HA coating was deposited on TiO2 using sol–gel technique. Phase structure, composition and microstructure of the surface coatings were analyzed by X-ray diffraction (XRD) and Energy Dispersive Spectrometer (EDS), respectively. The adhesion strength between the coatings with different Zn content was measured by tensile testing. The results showed that there was no significant influence of Zn content on adhesion strength between coating and Ti substrate.

scholarly journals Corrosion Resistance of Micro-Arc Oxidation/Graphene Oxide Composite Coatings on Magnesium Alloys

ACS Omega ◽  
2020 ◽  
Vol 5 (13) ◽  
pp. 7262-7270 ◽  
Author(s):  
Wei Shang ◽  
Fang Wu ◽  
Yuanyuan Wang ◽  
Amin Rabiei Baboukani ◽  
Yuqing Wen ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Graphene Oxide ◽  
Magnesium Alloys ◽  
Composite Coatings ◽  
Oxide Composite ◽  
Micro Arc Oxidation

Characterization of graphene oxide/ZrO2 composite coatings deposited on zirconium alloy by micro-arc oxidation

2020 ◽  
Vol 506 ◽  
pp. 144928 ◽  
Author(s):  
Zheng-yang Li ◽  
Zhen-bing Cai ◽  
Yuan Ding ◽  
Xue-Jun Cui ◽  
Zhong-bo Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Zirconium Alloy ◽  
Composite Coatings ◽  
Micro Arc Oxidation

Preparation and characterization of a calcium–phosphate–silicon coating on a Mg–Zn–Ca alloy via two-step micro-arc oxidation

2017 ◽  
Vol 19 (23) ◽  
pp. 15110-15119 ◽  
Author(s):  
Jinhe Dou ◽  
Yang Chen ◽  
Yiming Chi ◽  
Huancai Li ◽  
Guochao Gu ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Magnesium Alloys ◽  
Implant Materials ◽  
Micro Arc Oxidation ◽  
Silicon Coating

Magnesium alloys are the most promising implant materials due to their excellent biodegradability.

Microstructure and Corrosion Resistance Behavior of Composite Micro-Arc Oxidation and Sio2 Coatings on Magnesium Alloys

2010 ◽  
Vol 160-162 ◽  
pp. 1834-1838 ◽  
Author(s):  
Yan Feng Ge ◽  
Bai Ling Jiang ◽  
Zhi Yuan Yang ◽  
Yu Lei Li
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloys ◽  
Corrosion Protection ◽  
Potentiodynamic Polarization ◽  
Composite Coatings ◽  
Corrosion Process ◽  
Sio2 Layer ◽  
Xps Analysis ◽  
Micro Arc Oxidation

SiO2 sol sealing agent was developed by hydrolyzing of organic alkoxide, and protective composite coatings were obtained on magnesium alloys AZ31B by micro-arc oxidation (MAO) treatment plus a top coating with sealing agent using dipping-costing technique. SEM observations revealed that SiO2 sol immersed into pores and uniformly covered the surface of MAO coating. XPS analysis indicated that an inorganic SiO2 layer has formed on the surface of MAO coating. The results of potentiodynamic polarization tests showed that corrosion resistance of AZ31B alloys with composite coatings was evidently superior to that of merely MAO coating. The SiO2 layer provided corrosion protection by physically sealing the pores on the MAO coating and acting as a barrier. The composite coatings could suppress the corrosion process by preventing the transferring or diffusing of corrosive ions between magnesium alloys substrate and solution.

scholarly journals Fabrication and Characterization of Antimicrobial Magnetron Cosputtered TiO2/Ag/Cu Composite Coatings

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 473
Author(s):  
Dilyana Gospodonova ◽  
Iliana Ivanova ◽  
Todorka Vladkova
Keyword(s):  
Antimicrobial Activity ◽  
Composite Coatings ◽  
Surface Characteristics ◽  
Standard Test ◽  
Most Probable Number ◽  
Bacterial Strains ◽  
Probable Number ◽  
Fabrication And Characterization

The aim of this study was to prepare TiO2/Ag/Cu magnetron co-sputtered coatings with controlled characteristics and to correlate them with the antimicrobial activity of the coated glass samples. The elemental composition and distribution, surface morphology, wettability, surface energy and its component were estimated as the surface characteristics influencing the bioadhesion. Well expressed, specific, Ag/Cu concentration-dependent antimicrobial activity in vitro was demonstrated toward Gram-negative and Gram-positive standard test bacterial strains both by diffusion 21 assay and by Most Probable Number of surviving cells. Direct contact and eluted silver/coper nanoparticles killing were experimentally demonstrated as a mode of the antimicrobial action of the studied TiO2/Ag/Cu thin composite coatings. It is expected that they would ensure a broad spectrum bactericidal activity during the indwelling of the coated medical devices and for at least 12 h after that, with the supposition that the benefits will be over a longer time.

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