Improved wear and corrosion resistance of biological compatible TiZrNb films on biomedical Ti6Al4V substrates by optimizing sputtering power

Mu, Jianxun; Wang, Haiyan; Qin, Binhao; Zhang, Yupeng; Chen, Lijia; Zeng, Caiyou

doi:10.1016/j.surfcoat.2021.127866

Cited by 22 publications

(3 citation statements)

References 54 publications

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“…The most frequently used titanium alloy for medical applications today is Ti6Al4V [9]. Nevertheless, Ti6Al4V alloys are normally restricted to non-friction occasions due to the low hardness and poor wear resistance properties and they also present poor corrosion resistance properties in aggressive environments [10,11]. Cruz, Souza [12] stated that the degradation of titanium implants is as a result of a combination of micro-motions, the working environment and poor wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ti-Al-xNb Ternary Alloys via Laser-Engineered Net Shaping for Biomedical Application: Densification, Electrochemical and Mechanical Properties Studies

Kanyane

Popoola

Pityana³

et al. 2022

Materials

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The lives of many people around the world are impaired and shortened mostly by cardiovascular diseases (CVD). Despite the fact that medical interventions and surgical heart transplants may improve the lives of patients suffering from cardiovascular disease, the cost of treatments and securing a perfect donor are aspects that compel patients to consider cheaper and less invasive therapies. The use of synthetic biomaterials such as titanium-based implants are an alternative for cardiac repair and regeneration. In this work, an in situ development of Ti-Al-xNb alloys were synthesized via laser additive manufacturing for biomedical application. The effect of Nb composition on Ti-Al was investigated. The microstructural evolution was characterized using a scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS). A potentiodynamic polarization technique was utilized to investigate the corrosion behavior of TiAl-Nb in 3.5% NaCl. The microhardness and corrosion behaviour of the synthesized Ti-Al-Nb alloys were found to be dependent on laser-processing parameters. The microhardness performance of the samples increased with an increase in the Nb feed rate to the Ti-Al alloy system. Maximum microhardness of 699.8 HVN was evident at 0.061 g/min while at 0.041 g/min the microhardness was 515.8 HVN at Nb gas carrier of 1L/min, respectively.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Ti-Al-xNb Ternary Alloys via Laser-Engineered Net Shaping for Biomedical Application: Densification, Electrochemical and Mechanical Properties Studies

Kanyane

Popoola

Pityana³

et al. 2022

Materials

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“…The electrical conductivity of the thin film samples was calculated from the measurement of their sheet resistance using a T2001A3-EU four-point probe system (Ossila Limited, Sheffield, UK) and their thickness using a DektakXT stylus profilometer. Friction and wear behaviour were evaluated using a Nanovea T50 tribometer with AISI 440 stainless steel balls of 6 mm diameter sliding against the coating samples submerged in simulated body fluid (SBF) [ 38 ] at room temperature. A normal load of 1.52 N was applied to the stainless-steel ball when sliding in linear reciprocal motion mode at an amplitude of 5 mm and frequency of 1 Hz for 20 min, giving a total sliding distance of 12 m. Following the test, the wear scar morphologies were examined using an optical microscope of the Nanovea PB1000 Mechanical Tester, with coaxial white light illumination, and the wear volume was measured using a Nanovea JR25 profilometer.…”

Section: Methodsmentioning

confidence: 99%

Biocompatible Ti ₃ Au–Ag/Cu thin film coatings with enhanced mechanical and antimicrobial functionality

Lukose,

Anestopoulos,

Panagiotidis

et al. 2023

Biomater Res

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Background Biofilm formation on medical device surfaces is a persistent problem that shelters bacteria and encourages infections and implant rejection. One promising approach to tackle this problem is to coat the medical device with an antimicrobial material. In this work, for the first time, we impart antimicrobial functionality to Ti3Au intermetallic alloy thin film coatings, while maintaining their superior mechanical hardness and biocompatibility. Methods A mosaic Ti sputtering target is developed to dope controlled amounts of antimicrobial elements of Ag and Cu into a Ti3Au coating matrix by precise control of individual target power levels. The resulting Ti3Au-Ag/Cu thin film coatings are then systematically characterised for their structural, chemical, morphological, mechanical, corrosion, biocompatibility-cytotoxicity and antimicrobial properties. Results X-ray diffraction patterns reveal the formation of a super hard β-Ti3Au phase, but the thin films undergo a transition in crystal orientation from (200) to (211) with increasing Ag concentration, whereas introduction of Cu brings no observable changes in crystal orientation. Scanning and transmission electron microscopy analysis show the polyhedral shape of the Ti3Au crystal but agglomeration of Ag particles between crystal grains begins at 1.2 at% Ag and develops into large granules with increasing Ag concentration up to 4.1 at%. The smallest doping concentration of 0.2 at% Ag raises the hardness of the thin film to 14.7 GPa, a 360% improvement compared to the ∼4 GPa hardness of the standard Ti6Al4V base alloy. On the other hand, addition of Cu brings a 315—330% improvement in mechanical hardness of films throughout the entire concentration range of 0.5—7.1 at%. The thin films also show good electrochemical corrosion resistance and a > tenfold reduction in wear rate compared to Ti6Al4V alloy. All thin film samples exhibit very safe cytotoxic profiles towards L929 mouse fibroblast cells when analysed with Alamar blue assay, with ion leaching concentrations lower than 0.2 ppm for Ag and 0.08 ppm for Cu and conductivity tests reveal the positive effect of increased conductivity on myogenic differentiation. Antimicrobial tests show a drastic reduction in microbial survival over a short test period of < 20 min for Ti3Au films doped with Ag or Cu concentrations as low as 0.2—0.5 at%. Conclusion Therefore, according to these results, this work presents a new antimicrobial Ti3Au-Ag/Cu coating material with excellent mechanical performance with the potential to develop wear resistant medical implant devices with resistance to biofilm formation and bacterial infection. Graphical Abstract

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“…The main components of the passive films on the surfaces of the four coatings are TiO 2 and Al 2 O 3 , both of which provide corrosion resistance properties. [51,56] The aluminum content in the four coatings led to the formation of aluminum oxide on the surfaces of the passive films. Aluminum was the most reactive element in the passive film relative to the other elements, and therefore it appeared to be preferentially oxidized compared to the other elements.…”

Section: Passive Film Analysismentioning

confidence: 99%

Microstructure and Corrosion Behavior of Selective Laser‐Melted Al–Ti–Ni Coating on 90/10 Copper–Nickel Alloy

et al. 2022

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Copper-nickel alloys are widely used as corrosion-resistant structural materials because of their good mechanical workability, resistance to chloride erosion, and effective resistance to fouling by microorganisms. Therefore, they are widely used in coastal power plants, desalination plants, pipeline structures, and deep-sea submergence equipment. [1] With the increasing demand for corrosion-resistant materials, enhancing the corrosion-resistant properties of copper-nickel alloys has received widespread attention, [2] and many techniques have been proposed to improve the corrosion resistance of copper-nickel alloys. [3][4][5] Constructing corrosion-resistant coatings for these types of alloys through surface modification is cost-effective, easily accomplished, and designed to enhance the material properties of the alloy. Surface modification methods include spraying, [6,7] electrodeposition, [8,9] electroless plating, [10,11] and microarc oxidation. [12] Coatings prepared by these surface modification techniques are thinner and exhibit better corrosion resistance, [13][14][15][16] but they may suffer from poor coating compactness or weak bonding between the coating and the alloy. [13,17] Compared with the surface modification technologies mentioned above, coatings prepared by laser treatment are characterized by high preparation efficiency, environmental friendliness, good bonding, and high density. [18] Yang et al. [19] investigated the effect of Cr addition on the corrosion resistance of CuAl10 coatings. The corrosion resistance of the coatings was improved because the addition of Cr promoted the formation of a passive film on the coatings, thus reducing the diffusion of Fe from the substrate to the coatings. Also, the passivation ability of the coatings increased with increasing Cr content. Jiao et al. [20] investigated the effect of different Ti additions in Ti15M powders on composite coatings prepared using laser cladding. The results showed that Ti promoted the nucleation of a liquid phase during solidification and that the addition of Ti resulted in a uniform hardness distribution and improved the friction and wear properties of the coatings. Hulka et al. [21] studied the effects of laser power and Ti content on composite coatings prepared from WC-Co/ NiCrBSi powders. When the power was 1600 W, the coating was dense, effectively reducing the diffusion of substrate elements into the cladding layer. When the Ti content was 20%, the cracking susceptibility of the coating was reduced and the hardness was improved. The addition of Ti also effectively improved the corrosion resistance of the composite coatings. Compared with conventional technologies, selective laser melting (SLM) is energy efficient and highly effective. In addition, desirable characteristics such as ultrafine grain organization and a supersaturated solid solution can be obtained using SLM owing to its controlled heating/cooling rate during laser energy input. [22,23] Owing to the complex geometrical processing characteristics of the SLM process...

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Improved wear and corrosion resistance of biological compatible TiZrNb films on biomedical Ti6Al4V substrates by optimizing sputtering power

Cited by 22 publications

References 54 publications

Synthesis of Ti-Al-xNb Ternary Alloys via Laser-Engineered Net Shaping for Biomedical Application: Densification, Electrochemical and Mechanical Properties Studies

Synthesis of Ti-Al-xNb Ternary Alloys via Laser-Engineered Net Shaping for Biomedical Application: Densification, Electrochemical and Mechanical Properties Studies

Biocompatible Ti ₃ Au–Ag/Cu thin film coatings with enhanced mechanical and antimicrobial functionality

Microstructure and Corrosion Behavior of Selective Laser‐Melted Al–Ti–Ni Coating on 90/10 Copper–Nickel Alloy

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Improved wear and corrosion resistance of biological compatible TiZrNb films on biomedical Ti6Al4V substrates by optimizing sputtering power

Cited by 22 publications

References 54 publications

Synthesis of Ti-Al-xNb Ternary Alloys via Laser-Engineered Net Shaping for Biomedical Application: Densification, Electrochemical and Mechanical Properties Studies

Synthesis of Ti-Al-xNb Ternary Alloys via Laser-Engineered Net Shaping for Biomedical Application: Densification, Electrochemical and Mechanical Properties Studies

Biocompatible Ti 3 Au–Ag/Cu thin film coatings with enhanced mechanical and antimicrobial functionality

Microstructure and Corrosion Behavior of Selective Laser‐Melted Al–Ti–Ni Coating on 90/10 Copper–Nickel Alloy

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Biocompatible Ti ₃ Au–Ag/Cu thin film coatings with enhanced mechanical and antimicrobial functionality