Effects of Superimposed Micro/Nano-Structured Titanium Alloy Surface on Cellular Behaviors In Vitro

2016 ◽  
Vol 18 (7) ◽  
pp. 1259-1266 ◽  
Author(s):  
Teng Wang ◽  
Yi Wan ◽  
Zhanqiang Liu
Keyword(s):  
Titanium Alloy ◽  
Alloy Surface ◽  
Cellular Behaviors

scholarly journals Long-term antibacterial properties of a nanostructured titanium alloy surface: An in vitro study

2022 ◽  
Vol 13 ◽  
pp. 100176
Author(s):  
Richard Bright ◽  
Daniel Fernandes ◽  
Jonathan Wood ◽  
Dennis Palms ◽  
Anouck Burzava ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Antibacterial Properties ◽  
In Vitro Study ◽  
Vitro Study ◽  
Alloy Surface ◽  
Nanostructured Titanium

Influence of micro-nano surface texture on the hydrophobicity and corrosion resistance of a Ti6Al4V alloy surface

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Bochun Xu ◽  
Nan Zou ◽  
Yunhao Jia ◽  
Chao Feng ◽  
Jiajia Bu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Surface Texture ◽  
Surface Hydrophobicity ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Alloy Surface ◽  
Measurement Instruments ◽  
Content Type

Purpose The purpose of this paper is to study the effect of micro-nano surface texture on the corrosion resistance of a titanium alloy and investigate the correlation between corrosion resistance and hydrophobicity. Design/methodology/approach The surface of the Ti6Al4V alloy was modified by laser processing and anodizing to fabricate micro-pits, nanotubes and micro-nano surface textures. Afterward, the surface morphology, hydrophobicity and polarization curve of the samples were analyzed by cold field scanning electron microscopy, contact angle measurement instruments and a multi-channel electrochemical workstation. Findings The micro-nano surface texture can enhance the hydrophobicity of the Ti6Al4V surface, which may lead to better drag reduction to ease the friction of implants in vivo. Nevertheless, no correlation existed between surface hydrophobicity and corrosion resistance; the corrosion resistance of samples with nanotubes and high-density samples with micro-nano surface texture was extremely enhanced, indicating the similar corrosion resistance of the two. Research limitations/implications The mechanism of micro-dimples on the corrosion resistance of the micro-nano surface texture was not studied. Practical implications The density of micro-pits needs to be optimized to guarantee excellent corrosion resistance in the design of the micro-nano surface texture; otherwise, it will not fulfill the requirement of surface modification. Originality/value The influence of the micro-nano surface texture on the corrosion resistance, as well as the relationship between hydrophobicity and corrosion resistance of the titanium alloy surface, were systematically investigated for the first time. These conclusions offer new knowledge.

Transfer of Abrasive Material at Grinding a Titanium Alloy with a Wheel of Cubic Boron Nitride

2021 ◽  
Vol 316 ◽  
pp. 521-526
Author(s):  
Vladimir A. Nosenko ◽  
Alexander V. Fetisov ◽  
Semen P. Kuznetsov
Keyword(s):  
Titanium Alloy ◽  
Chemical Composition ◽  
Boron Nitride ◽  
Chemical Elements ◽  
Cubic Boron Nitride ◽  
Water Soluble ◽  
Alloy Surface ◽  
Ceramic Bond ◽  
Abrasive Tools ◽  
Wear Products

The article summarizes the results of the of the titanium alloy surface morphology and chemical composition study after grinding with a wheel of cubic boron nitride on a ceramic bond. The titanium alloy was treated using the method of cut-in grinding in the finishing mode using a synthetic water-soluble lubricant-cooling liquid that does not contain mineral oil. The research was carried out using the FEI Versa 3D LoVac electron microscope. Digital photos of the titanium alloy surface at different magnifications are given. Individual objects’ morphology allows us to identify them as wear products of abrasive tools. The chemical composition of the selected objects was studied by local x-ray spectral analysis. CBN crystals are partially or completely pressed into the treated surface and covered with a layer of the treated material. On the surface of CBN crystals, there are chemical elements that are part of the abrasive tool bond.

scholarly journals Antiparasitic Effect of Copper Alloy Surface on Cryptocaryon irritans in Aquaculture of Larimichthys crocea

2018 ◽  
Vol 85 (3) ◽  
Author(s):  
Fei Yin ◽  
Peibo Bao ◽  
Xiao Liu ◽  
Youbin Yu ◽  
Lei Wang ◽  
...  
Keyword(s):  
Copper Alloy ◽  
Copper Ions ◽  
Copper Alloys ◽  
Antimicrobial Properties ◽  
Alloy Surface ◽  
Larimichthys Crocea ◽  
Content Type ◽  
Cryptocaryon Irritans ◽  
Metal Levels

ABSTRACT Copper and alloys containing >60% copper by weight are antimicrobial. In aquaculture, copper alloys are used as part of corrosion-resistant cages or as part of copper coating. To test whether a copper alloy surface prevents the outbreak of parasitosis in the aquaculture of Larimichthys crocea, we covered the bottom of the aquaculture tank with sheets of copper alloy containing 74% to 78% copper, and we cultured L. crocea juveniles that had been artificially infected with the protozoan parasite Cryptocaryon irritans. Our results showed that these copper alloy sheets effectively blocked the infectious cycle of C. irritans within a 1-week period and significantly reduced the number of C. irritans trophonts and tomonts, thereby decreasing the mortality rate of L. crocea. In in vitro assays, the cytoplasmic membranes of protomonts disintegrated and the cytoplasm overflowed after just 5 minutes of contact with copper alloy surfaces. Although the same cytoplasmic membrane disintegration was not observed in tomonts, the tomonts completely lost their capacity for proliferation and eventually died following direct contact with copper alloy sheets for 1 h; this is likely because C. irritans tomonts took in >100 times more copper ions following contact with the copper alloy sheets than within the control aquaculture environment. Exposure to copper alloy sheets did not lead to excessive heavy metal levels in the aquacultured fish or in the culture seawater. IMPORTANCE Cryptocaryon irritans, a parasitic ciliate that penetrates the epithelium of the gills, skin, and fins of marine fish, causes acute suffocation and death in cultured fish within days of infection. Much of the existing research centers around the prevention of C. irritans infection, but no cure has been found. Studies demonstrate that copper has strong antimicrobial properties, and fish grown in copper-containing cages have lower rates of C. irritans infection, compared to those grown in other currently used aquaculture cages. In this study, we found that an alloy containing 74% to 78% copper by weight effectively killed C. irritans cells and prevented cryptocaryoniasis outbreaks within a 1-week period. These findings offer a new perspective on the prevention and control of cryptocaryoniasis.

scholarly journals Retraction: In vitro osteoinduction of human mesenchymal stem cells in biomimetic surface modified titanium alloy implants

2014 ◽  
Vol 33 (1) ◽  
pp. 148-148
Author(s):  
Sonia SANTANDER ◽  
Clara ALCAINE ◽  
Jaber LYAHYAI ◽  
Maria Angeles PÉREZ ◽  
Clementina RODELLAR ◽  
...  
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Titanium Alloy ◽  
Human Mesenchymal Stem Cells ◽  
Biomimetic Surface ◽  
Surface Modified

scholarly journals Stress Corrosion Analysis and Direct Cell Viability of Biodegradable Zn-Fe-Ca Alloy in In-Vitro Conditions

Metals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 76
Author(s):  
Orit Avior ◽  
Noa Ben Ghedalia-Peled ◽  
Tomer Ron ◽  
Jeremy Goldman ◽  
Razi Vago ◽  
...  
Keyword(s):  
Cell Viability ◽  
Stress Corrosion ◽  
Alloy Surface ◽  
Biodegradable Implants ◽  
Biodegradable Implant ◽  
Cyclic Potentiodynamic Polarization ◽  
Direct Cell ◽  
Phosphate Buffered Saline ◽  
Zn Alloy

Due to the excellent biocompatibility of Zn and Zn-based alloys, researchers have shown great interest in developing biodegradable implants based on zinc. Furthermore, zinc is an essential component of many enzymes and proteins. The human body requires ~15 mg of Zn per day, and there is minimal concern for systemic toxicity from a small zinc-based cardiovascular implant, such as an arterial stent. However, biodegradable Zn-based implants have been shown to provoke local fibrous encapsulation reactions that may isolate the implant from its surrounding environment and interfere with implant function. The development of biodegradable implants made from Zn-Fe-Ca alloy was designed to overcome the problem of fibrous encapsulation. In a previous study made by the authors, the Zn-Fe-Ca system demonstrated a suitable corrosion rate that was higher than that of pure Zn and Zn-Fe alloy. The Zn-Fe-Ca system also showed adequate mechanical properties and a unique microstructure that contained a secondary Ca-reach phase. This has raised the promise that the tested alloy could serve as a biodegradable implant metal. The present study was conducted to further evaluate this promising Zn alloy. Here, we assessed the material’s corrosion performance in terms of cyclic potentiodynamic polarization analysis and stress corrosion behavior in terms of slow strain rate testing (SSRT). We also assessed the ability of cells to survive on the alloy surface by direct cell culture test. The results indicate that the alloy develops pitting corrosion, but not stress corrosion under phosphate-buffered saline (PBS) and air environment. The direct cell viability test demonstrates the successful adherence and growth of cells on the alloy surface.

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