Formation mechanism and surface characterization of ceramic composite coatings on pure titanium prepared by micro-arc oxidation in electrolytes containing nanoparticles

2016 ◽  
Vol 291 ◽  
pp. 396-405 ◽  
Author(s):  
M. Shokouhfar ◽  
S.R. Allahkaram
Keyword(s):  
Formation Mechanism ◽  
Surface Characterization ◽  
Ceramic Composite ◽  
Composite Coatings ◽  
Pure Titanium ◽  
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 SEM and EDS Characterization of Porous Coatings Obtained On Titaniumby Plasma Electrolytic Oxidation in Electrolyte Containing Concentrated Phosphoric Acid with Zinc Nitrate

2017 ◽  
Vol 17 (2) ◽  
pp. 41-54 ◽  
Author(s):  
K. Rokosz ◽  
T. Hryniewicz ◽  
K. Pietrzak ◽  
W. Malorny
Keyword(s):  
Phosphoric Acid ◽  
Plasma Electrolytic Oxidation ◽  
Pure Titanium ◽  
Zinc Nitrate ◽  
Porous Coatings ◽  
Electrolytic Oxidation ◽  
Micro Arc Oxidation ◽  
Plasma Electrolytic ◽  
Peo Coatings

AbstractThe SEM and EDS results of porous coatings formed on pure titanium by Plasma Electrolytic Oxidation (Micro Arc Oxidation) under DC regime of voltage in the electrolytes containing of 500 g zinc nitrate Zn(NO3)2·6H2O in 1000 mL of concentrated phosphoric acid H3PO4at three voltages, i.e. 450 V, 550 V, 650 V for 3 minutes, are presented. The PEO coatings with pores, which have different shapes and the diameters, consist mainly of phosphorus, titanium and zinc. The maximum of zinc-to-phosphorus (Zn/P) ratio was found for treatment at 650 V and it equals 0.43 (wt%) | 0.20 (at%), while the minimum of that coefficient was recorded for the voltage of 450 V and equaling 0.26 (wt%) | 0.12 (at%). Performed studies have shown a possible way to form the porous coatings enriched with zinc by Plasma Electrolytic Oxidation in electrolyte containing concentrated phosphoric acid H3PO4with zinc nitrate Zn(NO3)2·6H2O.

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

Structure and In Vitro Bioactivity of Si Enriched Hydroxyapatite/TiO2 Coatings on Pure Titanium by Micro-Arc Oxidation

2007 ◽  
Vol 336-338 ◽  
pp. 1596-1598
Author(s):  
Rong Rong Nie ◽  
Feng Zhu ◽  
Li Ru Shen ◽  
Zhi Qing Chen ◽  
Xiao Yu Li ◽  
...  
Keyword(s):  
Cell Attachment ◽  
Composite Coatings ◽  
Composite Films ◽  
Pure Titanium ◽  
In Vitro Bioactivity ◽  
Si Doping ◽  
Amorphous Silicon Dioxide ◽  
Pdl Cells ◽  
Micro Arc Oxidation

The effect of Si doping on the bioactivity and characteristics of hydroxyapatite/TiO2 composite films was investigated. Pure titanium plates were treated to form Ca, P and Si enriched titania-based films by using micro-arc oxidation (MAO). Then, some specimens were undergone a further hydrothermal treatment to produce a thin outermost layer of hydroxyapatite (HA). Experiments revealed that that the film, which was about 10μm thick, was composed of amorphous silicon dioxide, amorphous calcium phosphate, rutile and anatase. The film was porous and uneven, with the pore size of 1-4μm. No obvious cracks exist on the surface. In order to investigate the cytocompatibility of the films, periodontal ligament (PDL) cells were seeded onto the surface of the films. It was concluded that the Si ion did not influence the characters of MAO film but Si enriched hydroxyapatite/ TiO2 composite coatings exhibited an effect on cell attachment.

EDM Surface Characterization of a Ceramic Composite TiB2/SiC

1991 ◽  
Vol 113 (4) ◽  
pp. 437-442 ◽  
Author(s):  
M. Ramulu ◽  
J. L. Garbini
Keyword(s):  
Electrical Discharge ◽  
Surface Characterization ◽  
Ceramic Composite ◽  
Surface Characteristics ◽  
Power Input ◽  
Recast Layer ◽  
Electrically Conductive ◽  
The Individual ◽  
Edm Process

Electrical Discharge Machined (EDM) hole surface characteristics of 20 percent Titanium diboride (TiB2) particulate and Silicon carbide (SiC) matrix composite material were investigated. The EDM hole surfaces produced by using brass, copper and graphite were examined by scanning electron microscopy (SEM) and surface profilometry to determine the surface characteristics. As-machined surfaces showed the microcracks in the recast layer, and the individual TiB2 grains were exposed on the surface. The depth of the recast structure on the surface has varied from 8 μm to less than a micrometer and was approximately proportional to the amount of impinging energy or power input. The EDM process appears to be a promising method of producing an excellent surface in electrically conductive TiB2/SiC composite under slow cutting conditions.

Hardness, Microstructure and Surface Characterization of Laser Gas Nitrided Commercially Pure Titanium Using High Power CO2 Laser

1998 ◽  
Vol 7 (5) ◽  
pp. 647-655 ◽  
Author(s):  
J. Senthil Selvan ◽  
K. Subramanian ◽  
A. K. Nath ◽  
A. K. Gogia ◽  
A. K. Balamurugan ◽  
...  
Keyword(s):  
High Power ◽  
Surface Characterization ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Commercially Pure
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