Studies on the Bioceramic Coating on Titamium Substrate Including Silicon and Calcium by Micro-Arc Oxidation and Osteoblast’s Adhesion and Proliferation on the Coating

2013 ◽  
Vol 683 ◽  
pp. 163-167 ◽  
Author(s):  
De Chao Li ◽  
Xin Liu ◽  
Lei Han ◽  
Jin Long Li ◽  
Su Cheng
Keyword(s):  
Pure Titanium ◽  
Porous Titanium ◽  
X Ray Diffraction ◽  
Energy Dispersion Spectrometer ◽  
Adhesion Ability ◽  
Micro Arc Oxidation ◽  
Oxidation Technology ◽  
Proliferation Ability ◽  
Main Component ◽  
Better Than

This study used micro-arc oxidation technology for pure titanium alloy surface modification, which 400μm titanium beads were sintered into porous titanium in vacuum conditions, and produced silicon and calcium coatings. Scanning electron microscope(SEM), X-ray diffraction (XRD) and Energy dispersion spectrometer(EDS) were employed to investigate the surface morphology and phase composition of the coatings. The results are listed as follows: the main component of porous titanium MAO coating is anatase TiO2,and the coating introduced silicon and calcium element successfully. The proliferation ability of osteoblasts on the oxidized and unoxidized surface was determined by CCK-8 method, The results indicated that both the proliferation and adhesion ability of osteoblast on the oxidized surface were better than the unoxidized surface.

Studies on Effect Factors of Porous Titanium Dioxide Film Degrading Azo Dyes

2012 ◽  
Vol 531 ◽  
pp. 403-406 ◽  
Author(s):  
Sheng Min Sun
Keyword(s):  
Titanium Dioxide ◽  
Ph Value ◽  
Uv Light ◽  
Pure Titanium ◽  
Degradation Process ◽  
Porous Titanium ◽  
Titanium Dioxide Film ◽  
Effect Factors ◽  
Micro Arc Oxidation ◽  
Dioxide Film

In pure titanium body, through the method of micro-arc oxidation (MAO) on the surface of porous titanium dioxide film and study on factors of methyl orange in the light influence of catalytic degradation process, the results show that: with uv light for the source, pH value of 5, micro-arc oxidation voltage is 400 V, the catalytic activity of porous titanium dioxide film was the highest.

Preparation of Bioactive Hydroxyapatite on Pure Titanium

2009 ◽  
Vol 24 (1_suppl) ◽  
pp. 169-182 ◽  
Author(s):  
Wang Tianshi ◽  
Zhang Renji ◽  
Yan Yongnian
Keyword(s):  
Titanium Surface ◽  
Pure Titanium ◽  
Cell Counting ◽  
Cell Compatibility ◽  
Ha Coating ◽  
Micro Arc Oxidation ◽  
Surface Metal ◽  
Titanium Surfaces ◽  
Better Than ◽  
Complex Oxidation

In this study, a hydroxyapatite (HA) was coated on a pure titanium surface by means of a complex oxidation and hydrothermal treatment. First an anodic oxidation was done on the titanium plates, followed by micro-arc oxidation. The HA-coated specimens and pure titanium specimens were immersed in SLB for 1, 5, and 10 days, respectively, to study their electrochemical behavior. The corrosion currents of HA-coated specimens were less than pure titanium specimens. This indicated that HA coating prevented surface metal ions of the implant from dissolving, thereby, reducing the tissue toxicity. The cytotoxic effect on fibroblasts L929 cells was measured by cell counting after being seeded for 2, 4, 8, 12, and 24 h. The number of surface cell attachments on the HA-coated specimens was much greater than on pure titanium specimens. The morphology of the cells on the HA coating had normal shapes and spread well with some cells climbing onto surface pores while cells on the pure titanium were oval shaped. The results confirm that the cell compatibility on HA-coated ion titanium surfaces is much better than pure titanium.

The Effect of Oxidized Time to Structure and Composition of Micro-Arc Oxidization Ceramic Coating of Pure Titanium

2016 ◽  
Vol 852 ◽  
pp. 984-991
Author(s):  
Lin Xu ◽  
Jian Ning Ding ◽  
Zhen Huang ◽  
Ni Na Han ◽  
Xiao Jing Xu ◽  
...  
Keyword(s):  
Ceramic Coating ◽  
Pure Titanium ◽  
Relative Content ◽  
X Ray Diffraction ◽  
X Ray ◽  
Opposite Trend ◽  
Micro Arc Oxidation ◽  
Porous Oxide ◽  
3D Profilometer ◽  
Scanning Electron

The porous oxide TiO2 ceramic coating containing Ca and P is fabricated on the surface of pure titanium in the electrolyte of C4H6CaO4-NaH2PO4 by micro-arc oxidation (MAO) method. Scanning electron microscopy (SEM) and 3D profilometer are used to observe difference between morphology of coating surface under condition of different oxidized time. Energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) are used to discuss the effect of oxidized time to the ratio of Ca/P and phase composition of ceramic coating. Results indicate that the oxidized time has a little effect on structure and composition of MAO ceramic coating of pure titanium. After modified with MAO, pure titanium is rough and porous on its surface, its average aperture, porosity and roughness enlarge as oxidized time extends. The increase of oxidized time makes the ratio of Ca/P and the relative content of rutile TiO2 increases, but the relative content of anatase TiO2 shows opposite trend.

The Influences of Frequency on the Fabrication and Structural Studies of Micro-Arc Oxidization Ceramic Films Formed on Pure Titanium

2017 ◽  
Vol 727 ◽  
pp. 977-984
Author(s):  
Lin Xu ◽  
Cong Wu ◽  
Xiao Jing Xu ◽  
Bo Quan Li ◽  
Xiao Ya Niu ◽  
...  
Keyword(s):  
Mixed Crystal ◽  
Pure Titanium ◽  
Structural Studies ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ceramic Film ◽  
Ceramic Films ◽  
Micro Arc Oxidation ◽  
Porous Oxide ◽  
3D Profilometer

The porous oxide TiO2 ceramic film containing Ca and P is fabricated on the surface of pure titanium in the electrolyte of C4H6CaO4-NaH2PO4 by micro-arc oxidation (MAO) method. The microscopic structure, elemental composition and phase components of Ceramic Film are studied with scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), 3D profilometer and etc. Results indicate that the ceramic film on pure titanium by micro-arc oxidation is a porous mixed crystal structure which contains anatase TiO2 and rutile TiO2, and that the film is mainly composed of such elements as Ti, O, Ca and P. With frequency increasing, the number of micropores increases, the hole is decreased in diameter, porosity and roughness,and the surface is more smooth. The increase of frequencies makes the ratio of Ca/P decrease, the relative content of anatase TiO2 increase and rutile TiO2 decrease.

The Effect of Current Density to Surface Morphology and Component of Micro-Arc Oxidization Ceramic Coating of Pure Titanium

2016 ◽  
Vol 852 ◽  
pp. 992-999 ◽  
Author(s):  
Lin Xu ◽  
Jian Ning Ding ◽  
Zhen Huang ◽  
Ni Na Han ◽  
Xiao Jing Xu ◽  
...  
Keyword(s):  
Current Density ◽  
Mixed Crystal ◽  
Ceramic Coating ◽  
Pure Titanium ◽  
Film Surface ◽  
X Ray Diffraction ◽  
Average Pore ◽  
X Ray ◽  
Micro Arc Oxidation ◽  
3D Profilometer

The ceramic coating containing anatase TiO2 and rutile TiO2 is fabricated on the surface of pure titanium in the electrolyte of C4H6CaO4-NaH2PO4 by micro-arc oxidation (MAO) method. The effect of different current density to microscopic structure, elemental composition and phase components of Ceramic Coating are studied with scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), 3D profilometer and etc. Results indicate that the ceramic coating on pure titanium by micro-arc oxidation is a porous mixed crystal structure which is mainly composed of such elements as Ti, O, Ca and P. With current density increasing, the average pore diameter and roughness on film surface first increase and then decrease, the porosity increases, the ratio of Ca/P then decreases, the relative content of anatase TiO2 increases and that of rutile TiO2 decreases.

Bioactive Porous Film Produced on Titanium Substrate by Micro-Arc Oxidation

2008 ◽  
Vol 368-372 ◽  
pp. 1201-1202
Author(s):  
Q. Ma ◽  
Y.J. Wang ◽  
Cheng Yun Ning ◽  
Hai Mei Cheng ◽  
Zhao Yi Yin
Keyword(s):  
Pure Titanium ◽  
Titanium Substrate ◽  
Disodium Salt ◽  
Commercially Pure Titanium ◽  
X Ray Diffraction ◽  
Electrolytic Solution ◽  
Glycerol Phosphate ◽  
X Ray ◽  
Commercially Pure ◽  
Micro Arc Oxidation

Porous bioactive thin film on commercially pure titanium substrate was prepared by micro-arc oxidation (MAO) in electrolytic solution, which contained calcium acetate, β-glycerol phosphate disodium salt pentahydrate (β-GP) and lanthanum nitrate. The phases and microstructure of the bioactive films were examined by X-ray diffraction, scanning electron microscopy with energy dispersive X-ray spectrometer and electron probe microanalysis. The results showed that: (1) porous bioactive films with about 10μm were formed on titanium substrate by MAO; (2) phases of the thin films were hydroxyapatite, anatase and rutile; (3) elements of Ca, P, and Ti of films were identified by EDS.

Effects of Hypophosphate Concentrations on the Characteristics of Micro-Arc Oxidation Coatings Formed on Biomedical NiTi Alloy

2011 ◽  
Vol 314-316 ◽  
pp. 240-244
Author(s):  
Ji Lin Xu ◽  
Jun Ming Luo ◽  
Fu Liu
Keyword(s):  
Surface Roughness ◽  
Corrosion Resistance ◽  
Bonding Strength ◽  
Niti Alloy ◽  
Microarc Oxidation ◽  
X Ray Diffraction ◽  
Micro Arc Oxidation ◽  
Surface Morphologies ◽  
Hank’S Solution ◽  
Better Than

Microarc oxidation coatings on biomedical NiTi alloy were prepared in aluminate electrolytes with and without hypophosphate addition. The effect of hypophosphate concentrations on the characteristics of micro-arc oxidation coatings has been studied. The compositions and surface morphologies of the coatings prepared in different hypophosphate concentrations were determined by energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Surface roughness (Ra) and bonding strength of the coatings were measured by surface roughmeter and a direct pull-off test, respectively. The corrosion resistance of the coatings was evaluated in Hank’s solution using potentiodynamic polarization tests. The results show that all of the coatings exhibit a typical porous surface structure and mainly consist of γ-Al2O3 crystal phase. With increasing the hypophosphate concentrations, the elemental contents of Ni, Ti and P increase while Al decreases; the pore sizes and surface roughness of the coatings decrease firstly, reaching a minimum value at 0.01mol/L, and then increase; at the same time, the bonding strength increases up to 60MPa, and then decreases. The corrosion resistance of the coatings decreases with the increase of the hypophosphate concentrations, but all of the coated samples is better than that of the uncoated NiTi alloy.

scholarly journals Zn- or Cu-containing CaP-Based Coatings Formed by Micro-Arc Oxidation on Titanium and Ti-40Nb Alloy: Part II—Wettability and Biological Performance

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4366
Author(s):  
Ekaterina G. Komarova ◽  
Yurii P. Sharkeev ◽  
Mariya B. Sedelnikova ◽  
Oleg Prymak ◽  
Matthias Epple ◽  
...  
Keyword(s):  
Surface Energy ◽  
Pure Titanium ◽  
Multipotent Mesenchymal Stromal Cells ◽  
Contact Angles ◽  
Polar Component ◽  
Micro Arc Oxidation ◽  
Main Component ◽  
Biological Performance

This work describes the wettability and biological performance of Zn- and Cu-containing CaP-based coatings prepared by micro-arc oxidation on pure titanium (Ti) and novel Ti-40Nb alloy. Good hydrophilic properties of all the coatings were demonstrated by the low contact angles with liquids, not exceeding 45°. An increase in the applied voltage led to an increase of the coating roughness and porosity, thereby reducing the contact angles to 6° with water and to 17° with glycerol. The free surface energy of 75 ± 3 mJ/m2 for all the coatings were determined. Polar component was calculated as the main component of surface energy, caused by the presence of strong polar PO43− and OH− bonds. In vitro studies showed that low Cu and Zn amounts (~0.4 at.%) in the coatings promoted high motility of human adipose-derived multipotent mesenchymal stromal cells (hAMMSC) on the implant/cell interface and subsequent cell ability to differentiate into osteoblasts. In vivo study demonstrated 100% ectopic bone formation only on the surface of the CaP coating on Ti. The Zn- and Cu-containing CaP coatings on both substrates and the CaP coating on the Ti-40Nb alloy slightly decreased the incidence of ectopic osteogenesis down to 67%. The MAO coatings showed antibacterial efficacy against Staphylococcus aureus and can be arranged as follows: Zn-CaP/Ti > Cu-CaP/TiNb, Zn-CaP/TiNb > Cu-CaP/Ti.

Design of Scanning Micro-Arc Oxidation Forming Ceramic Coatings on 2024 Aluminium Alloy

2011 ◽  
Vol 189-193 ◽  
pp. 1296-1300 ◽  
Author(s):  
Peng Xiang Lv ◽  
Guan Xin Chi ◽  
Dong Bo Wei ◽  
Shi Chun Di
Keyword(s):  
Arc Discharge ◽  
Ceramic Coatings ◽  
Element Distribution ◽  
Treatment Technique ◽  
X Ray Diffraction ◽  
High Stage ◽  
Micro Arc Oxidation ◽  
Anodic Voltage ◽  
Oxidation Technology ◽  
Plasma Electrolytic

Micro-arc oxidation (MAO), also called plasma electrolytic oxidation (PEO), anodic spark deposition (ASD), or micro-arc discharge oxidizing (MDO), is an effective surface treatment technique which come from anodic oxidation technology. Via increasing the anodic voltage breaking through faraday area to a high stage accompanied by micro-arc discharge phenomenon, It indicated the ceramic coatings thickness increase along with the scanning times increase, while the thickness increment reduces. The phase composition, morphology and element distribution was studied by X-ray diffraction, scanning electron microscopy and line scanning. The morphology of the ceramic coatings shows it divided into compact layer and loose layer. And it composes of α-Al2O3 and γ-Al2O3.

Cell Compatibility of the Micro-Arc Oxidized Surface of Large Plastic Deformed TA2 In Vitro

2016 ◽  
Vol 852 ◽  
pp. 1220-1226
Author(s):  
Li Hua Zhu ◽  
Xiao Jing Xu ◽  
Ting Zhuo Chen ◽  
Xiao Ya Niu ◽  
Lin Xu
Keyword(s):  
Cell Proliferation ◽  
Cell Adhesion ◽  
Large Deformation ◽  
Structure Refinement ◽  
Pure Titanium ◽  
Cell Toxicity ◽  
Cell Compatibility ◽  
Proliferation Ability ◽  
Better Than

The cell toxicity, cell proliferation and cell adhesion behaviors on the micro-arc oxidized surface of the conventional and large plastic deformed pure titanium (TA2) were studied. The results show that all samples have no cell toxicity. The cell proliferation ability on the surface of the large plastic deformed pure titanium (TA2) is better than that of the conventional pure titanium (TA2). The numbers of cells adhered on micro-arc oxidized surface of the large plastic deformed of pure titanium (TA2) are more than that of conventional pure titanium (TA2). And the distribution of the cells and cell morphologies are better than that of the conventional pure titanium (TA2). Results all above show that structure refinement of large deformation of pure titanium (TA2) has more significant improvement on the cell compatibility of the micro-arc oxidized modified films.

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