Tribological behavior of plasma sprayed carbon nanotubes reinforced TiO2 coatings

Wang, Haidou; He, Pan; Guo, Ma; Xu, Bin; Xing, Zhiguo; Chen, Shuying; Liu, Zhe; Wang, Yiwen

doi:10.1016/j.jeurceramsoc.2018.04.019

Cited by 41 publications

(15 citation statements)

References 47 publications

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“…Some of the coatings associated with superlubricity have been introduced in the superlubricity section and are not covered in detail again. Here, several new advances in tribological-related coating technology are briefly introduced, such as oxide coating [183][184][185][186], metal coating [187,188], composite coating [183,185,189,190], ceramic coating [191,192], and so on.…”

Section: Lubrication Of Surface Coatingsmentioning

confidence: 99%

“…Wang et al [183,189] designed and prepared carbon nanotubes reinforced TiO 2 coatings, and found that a small content of CNTs could enhance the tribological properties of plasma sprayed ceramic coating remarkably, indirectly by influencing microstructure of coating and directly by tribo-effects of CNTs during tribotest, including structure strengthening, triboreorientation, tribo-protruding, tribo-film, and tribodefection as shown in Fig. 17.…”

Section: Lubrication Of Surface Coatingsmentioning

confidence: 99%

“…Schematic illustration to reveal the CNTs induced wear mechanism for plasma sprayed ceramic coating: (1) structure strengthening, (2) tribo-protruding of CNTs, (3) tribo-reorientation of CNTs, (4) tribo-film of CNTs, and (5) tribo-defection of CNTs. Reproduced with permission from Ref [183]…”

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confidence: 99%

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A review of recent advances in tribology

et al. 2020

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The reach of tribology has expanded in diverse fields and tribology related research activities have seen immense growth during the last decade. This review takes stock of the recent advances in research pertaining to different aspects of tribology within the last 2 to 3 years. Different aspects of tribology that have been reviewed including lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology. This review attempts to highlight recent research and also presents future outlook pertaining to these aspects. It may however be noted that there are limitations of this review. One of the most important of these is that tribology being a highly multidisciplinary field, the research results are widely spread across various disciplines and there can be omissions because of this. Secondly, the topics dealt with in the field of tribology include only some of the salient topics (such as lubrication, wear, surface engineering, biotribology, high temperature tribology, and computational tribology) but there are many more aspects of tribology that have not been covered in this review. Despite these limitations it is hoped that such a review will bring the most recent salient research in focus and will be beneficial for the growing community of tribology researchers.

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Section: Lubrication Of Surface Coatingsmentioning

confidence: 99%

Section: Lubrication Of Surface Coatingsmentioning

confidence: 99%

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A review of recent advances in tribology

et al. 2020

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“…This directly prevents the adhesion of bone cells on titanium implant surface after the surgical implantation [6,7]. Therefore, in order to enhance bioactivity, TiO2 and/or hydroxyapatite-based bioceramic structures are coated on titanium implant surfaces by various surface modification techniques such as plasma spray [8][9][10], sol-gel [11,12], acid etching [13] and sand blasting [14,15]. Unfortunately, these techniques exhibit some limitations such as low adhesion, phase impurity and poor durability [1].…”

Section: Introductionmentioning

confidence: 99%

Characterization and Investigation of Biological Properties of Ag-Doped TiO2 Coatings Fabricated on Titanium

Durdu¹

2019

Anadolu University Journal of Science and Technology-a Applied Sciences and Engineering

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In present study, Ag-doped TiO2 bioceramic coatings are fabricated on cp-Ti by plasma electrolytic oxidation (PEO) and physical vapor deposition (PVD). The phase composition, surface microstructure, elemental composition, surface topography, wettability and chemical state of the PEO and Ag-doped TiO2 surfaces are characterized by using powder-and thin film-X-ray diffraction (TF-XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), surface profilometer and contact angle measurement system (CAM), respectively. The PEO coating' surface is porous and rough due to the nature of process. The Ti, anatase-TiO2, rutile-TiO2 and Ag2O phases are detected on the Ag-doped PEO surfaces by TF-XRD while The Ti, anatase and rutile phases are obtained on the PEO surfaces. The surface morphological structures of the PEO and Ag-doped PEO coatings are nearly identical although the surface chemistry of it is changed by PVD process. The Ti, O, P and Ag elements are observed on the Ag-doped PEO surfaces by EDS. Also, the amount of Ag existed on the surface is below cytotoxic limit. The Ag-doped PEO surfaces indicate better hydrophilic character to the PEO surface owing to increasing polarity of the surfaces. In vitro hydroxyapatite-forming ability is evaluated by immersion in simulated body fluid (SBF) at 36.5 C for 28 days. The Agdoped PEO surfaces show good hydroxyapatite formation ability compared to the PEO surface. The antibacterial activity is evaluated by exposing the samples to Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). And then, they are compared by the reaction of the pathogens to Ag-doped PEO with the PEO controls. The antibacterial ability of the Ag-doped PEO surfaces is significantly improved respect to the PEO surfaces for S. aureus and E. coli.

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“…They have recently received great attention for the biomedical applications owing to their more stable chemical composition [11,12]. TiO 2 were fabricated on cp-Ti by various surface coating methods including sol-gel [13], anodic oxidation [14], magnetron sputtering [15], electrophoretic deposition [16], acid etching [17,18], laser surface treatment [19], plasma spraying [20,21] and micro arc oxidation [22][23][24][25] etc. However, certain problems like non-homogenous structure, micro-structural control problems, micro-cracks formation, the presence of phase impurity, poor adhesion strength were observed in these methods except for MAO technique [26][27][28].…”

mentioning

confidence: 99%

Characterization, Bioactivity and Antibacterial Properties of Copper-Based TiO2 Bioceramic Coatings Fabricated on Titanium

Durdu

2018

Coatings

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The bioactive and anti-bacterial Cu-based bioceramic TiO 2 coatings have been fabricated on cp-Ti (Grade 2) by two-steps. These two-steps combine micro-arc oxidation (MAO) and physical vapor deposition-thermal evaporation (PVD-TE) techniques for dental implant applications. As a first step, all surfaces of cp-Ti substrate were coated by MAO technique in an alkaline electrolyte, consisting of Na 3 PO 4 and KOH in de-ionized water. Then, as a second step, a copper (Cu) nano-layer with 5 nm thickness was deposited on the MAO by PVD-TE technique. Phase structure, morphology, elemental amounts, thickness, roughness and wettability of the MAO and Cu-based MAO coating surfaces were characterized by XRD (powder-and TF-XRD), SEM, EDS, eddy current device, surface profilometer and contact angle goniometer, respectively. The powder-and TF-XRD spectral analyses showed that Ti, TiO 2 , anatase-TiO 2 and rutile-TiO 2 existed on the MAO and Cu-based MAO coatings' surfaces. All coatings' surfaces were porous and rough, owing to the presence of micro sparks through MAO. Furthermore, the surface morphology of Cu-based MAO was not changed. Also, the Cu-based MAO coating has more hydrophilic properties than the MAO coating. In vitro bioactivity and in vitro antibacterial properties of the coatings have been investigated by immersion in simulated body fluid (SBF) at 36.5 • C for 28 days and bacterial adhesion for gram-positive (S. aureus) and gram-negative (E. coli) bacteria, respectively. The apatite layer was formed on the MAO and Cu-based MAO surfaces at post-immersion in SBF and therefore, the bioactivity of Cu-based MAO surface was increased to the MAO surface. Also, for S. aureus and E. coli, the antibacterial properties of Cu-based MAO coatings were significantly improved compared to one of the uncoated MAO surfaces. These results suggested that Cu-based MAO coatings on cp-Ti could be a promising candidate for biomedical dental implant applications.TiO 2 -based coatings have been suggested to improve corrosion resistance, bioactivity and biocompatibility of implant surfaces. They have recently received great attention for the biomedical applications owing to their more stable chemical composition [11,12]. TiO 2 were fabricated on cp-Ti by various surface coating methods including sol-gel [13], anodic oxidation [14], magnetron sputtering [15], electrophoretic deposition [16], acid etching [17,18], laser surface treatment [19], plasma spraying [20,21] and micro arc oxidation [22][23][24][25] etc. However, certain problems like non-homogenous structure, micro-structural control problems, micro-cracks formation, the presence of phase impurity, poor adhesion strength were observed in these methods except for MAO technique [26][27][28]. Thus, implant application areas of the coatings produced by these techniques are limited.Micro-arc oxidation (MAO) is one of the most applicable methods to deposit a porous and rough bioceramic layer on valve metals such as Ti, Al, Mg, and Zr surfaces [3,[29][30][31]. The MAO coating promotes bioacti...

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Tribological behavior of plasma sprayed carbon nanotubes reinforced TiO2 coatings

Cited by 41 publications

References 47 publications

A review of recent advances in tribology

A review of recent advances in tribology

Characterization and Investigation of Biological Properties of Ag-Doped TiO2 Coatings Fabricated on Titanium

Characterization, Bioactivity and Antibacterial Properties of Copper-Based TiO2 Bioceramic Coatings Fabricated on Titanium

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