Enhanced corrosion resistance and cellular behavior of ultrafine-grained biomedical NiTi alloy with a novel SrO–SiO2–TiO2 sol–gel coating

2011 ◽  
Vol 257 (13) ◽  
pp. 5913-5918 ◽  
Author(s):  
C.Y. Zheng ◽  
F.L. Nie ◽  
Y.F. Zheng ◽  
Y. Cheng ◽  
S.C. Wei ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Niti Alloy ◽  
Sol Gel ◽  
Cellular Behavior ◽  
Ultrafine Grained ◽  
Tio2 Sol

Surface Morphology and Corrosion Resistance of Neodimium Doped TiO2 Sol-gel Coatings

2018 ◽  
Author(s):  
Stancho I. Yordanov ◽  
Luben I. Lakov ◽  
Irina D. Stambolova ◽  
Vladimir N. Blaskov ◽  
Sasho V. Vassilev ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Surface Morphology ◽  
Sol Gel ◽  
Doped Tio2 ◽  
Tio2 Sol

Improved Corrosion Resistance of NiTi Alloy by Coated with TiO2-SiO2-HAP Composite Films

2013 ◽  
Vol 634-638 ◽  
pp. 996-1000 ◽  
Author(s):  
Jing Xiao Liu ◽  
Fei Shi ◽  
Lei Bao ◽  
Yadong Li ◽  
Zhi Qiang Hu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Composite Film ◽  
Adhesive Strength ◽  
Niti Alloy ◽  
Sol Gel ◽  
Composite Films ◽  
Amorphous State ◽  
Treatment Temperature ◽  
Sio2 Content ◽  
Molar Ratio

In order to further improve the corrosion resistance and bioactivity of NiTi alloy, TiO2-SiO2-HAP (hydroxyapatite) composite films with different composition were prepared on NiTi alloy substrate by a sol-gel method. The phase composition, surface morphology, interface adhesive strength and corrosion resistance were studied. The results indicated that the composite film heat-treated at 500°C showed amorphous state, and with increasing of heat-treatment temperature, crystals of CaSiO3, anatase TiO2 and hydroxyapatite (HAP) appeared. The composite film with higher (TiO2-SiO2) content was more uniform and smooth, and had higher interface adhesive strength with the substrate. With the decreasing of (TiO2-SiO2) content, the composite films tended to become irregular, and tiny crack clusters with ringy distribution appeared when the (Ti+Si)/Ca molar ratio was decreased to 25/75, which led to decrease of interface adhesive strength to some extent. The anodic polarization curves indicated that NiTi alloy coated with TiO2-SiO2-HAP composite films had an apparent improvement of corrosion resistance, with an obvious decrease of passivation current.

scholarly journals Thickness controlled SiO2/TiO2 sol-gel coating by spraying

Open Ceramics ◽  
2021 ◽  
pp. 100121
Author(s):  
M. Jacobs ◽  
Y. De Vos ◽  
V. Middelkoop
Keyword(s):  
Sol Gel ◽  
Tio2 Sol

scholarly journals Optical, electrical and mechanical properties of TiN thin film obtained from a TiO2 sol-gel coating and rapid thermal nitridation

2021 ◽  
pp. 127089
Author(s):  
Arnaud Valour ◽  
Maria Alejandra Usuga Higuita ◽  
Gaylord Guillonneau ◽  
Nicolas Crespo-Monteiro ◽  
Damien Jamon ◽  
...  
Keyword(s):  
Thin Film ◽  
Mechanical Properties ◽  
Sol Gel ◽  
Tio2 Sol ◽  
Thermal Nitridation

Enhanced in vitro biocompatibility of ultrafine-grained biomedical NiTi alloy with microporous surface

2011 ◽  
Vol 257 (21) ◽  
pp. 9086-9093 ◽  
Author(s):  
C.Y. Zheng ◽  
F.L. Nie ◽  
Y.F. Zheng ◽  
Y. Cheng ◽  
S.C. Wei ◽  
...  
Keyword(s):  
Niti Alloy ◽  
In Vitro Biocompatibility ◽  
Ultrafine Grained

Structure and Resistance to Electrochemical Corrosion of NiTi Alloy

2013 ◽  
Vol 203-204 ◽  
pp. 335-338 ◽  
Author(s):  
Bożena Łosiewicz ◽  
Magdalena Popczyk ◽  
Tomasz Goryczka ◽  
Józef Lelątko ◽  
Agnieszka Smołka ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Niti Alloy ◽  
Electrochemical Corrosion ◽  
High Resolution Electron Microscopy ◽  
Potential Method ◽  
Passive Layer ◽  
Open Circuit ◽  
Experimental Conditions ◽  
Electrochemical Tests ◽  
Reflectivity Method

The NiTi alloy (50.6 at.% Ni) passivated for 30 min at 130°C by autoclaving has been studied towards corrosion resistance in aqueous solutions of 3% NaCl, 0.1 M H2SO4, 1 M H2SO4 and HBSS. Structure and thickness of the passive layer (TiO2, rutile) were examined by X-ray reflectivity method and high resolution electron microscopy. Corrosion behavior of this oxide layer was investigated by open circuit potential method and polarization curves. It was found that the corrosion resistance of the passivated NiTi alloy is strongly dependent on the type of corrosive environment. The higher corrosion resistance of the tested samples was revealed in sulfate solutions as compared to chloride ones. The highest resistance to electrochemical corrosion of the NiTi alloy was observed in 0.1 M H2SO4 solution. Susceptibility to pitting corrosion of the tested samples was observed which increased with the concentration rise of chlorine anions in solution. Electrochemical tests for 316L stainless steel carried out under the same experimental conditions revealed a weaker corrosion resistance in all solutions as compared to the highly corrosion resistant NiTi alloy.

Photocatalytic degradation of trichloroethylene in the gas phase over TiO2 sol-gel films: Analysis of products

Chemosphere ◽  
1998 ◽  
Vol 36 (3) ◽  
pp. 483-495 ◽  
Author(s):  
Jong-Soon Kim ◽  
Kiminori Itoh ◽  
Masayuki Murabayashi
Keyword(s):  
Photocatalytic Degradation ◽  
Gas Phase ◽  
Sol Gel ◽  
Tio2 Sol ◽  
Sol Gel Films

Zirconia sol–gel coatings on alumina–silica refractory material for improved corrosion resistance

2009 ◽  
Vol 204 (4) ◽  
pp. 477-483 ◽  
Author(s):  
Aaron J. Kessman ◽  
Karpagavalli Ramji ◽  
Nicholas J. Morris ◽  
Darran R. Cairns
Keyword(s):  
Corrosion Resistance ◽  
Refractory Material ◽  
Sol Gel ◽  
Silica Refractory

Effect of Equal Channel Angular Pressing and Annealing on Corrosion Resistance of Al-Cu Alloy

2013 ◽  
Vol 803 ◽  
pp. 226-229
Author(s):  
Da Ran Fang ◽  
Chun Liu ◽  
Feng Fang Liu
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Equal Channel Angular Pressing ◽  
Annealing Treatment ◽  
Coarse Grained ◽  
Nacl Solution ◽  
Angular Pressing ◽  
Cu Alloy ◽  
Low Temperature Annealing ◽  
Ultrafine Grained

Al-3.9wt.%Cu alloy was subjected to equal channel angular pressing (ECAP) and subsequent low temperature annealing treatment, and the corrosion resistance of the samples was investigated by potentiodynamic polarization measurements in 3.5% NaCl solution. The results show that the corrosion rate of the ultrafine-grained alloy increases, in comparison with the coarse-grained alloy. Meanwhile, it is noted that the corrosion resistance of the alloy subjected to ECAP can be improved by relief annealing.

scholarly journals Preparation and Characterization of a Sol–Gel AHEC Pore-Sealing Film Prepared on Micro Arc Oxidized AZ31 Magnesium Alloy

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 784
Author(s):  
Longlong Zhang ◽  
Yuanzhi Wu ◽  
Tian Zeng ◽  
Yu Wei ◽  
Guorui Zhang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Sol Gel ◽  
Oxide Coating ◽  
Az31 Magnesium Alloy ◽  
Hydroxyethyl Cellulose ◽  
Gel Spinning ◽  
Test Analysis ◽  
Pore Sealing ◽  
Micro Arc Oxidation

The purpose of this study was to improve the cellular compatibility and corrosion resistance of AZ31 magnesium alloy and to prepare a biodegradable medical material. An aminated hydroxyethyl cellulose (AHEC) coating was successfully prepared on the surface of a micro-arc oxide +AZ31 magnesium alloy by sol–gel spinning. The pores of the micro-arc oxide coating were sealed. A polarization potential test analysis showed that compared to the single micro-arc oxidation coating, the coating after sealing with AHEC significantly improved the corrosion resistance of the AZ31 magnesium alloy and reduced its degradation rate in simulated body fluid (SBF). The CCK-8 method and cell morphology experiments showed that the AHEC + MAO coating prepared on the AZ31 magnesium alloy had good cytocompatibility and bioactivity.

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