Tribological and mechanical properties of amorphous and semi-crystalline PEEK/SiO2 nanocomposite coatings deposited on the plain carbon steel by electrostatic powder spray technique

Hedayati, M.; Salehi, Mehdi; Bagheri, Rouhollah; Panjepour, Masoud; Naeimi, Farid

doi:10.1016/j.porgcoat.2011.09.014

Cited by 51 publications

(44 citation statements)

References 34 publications

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“…From the tribological and mechanical point of view, a semi-crystalline spherulitic structure of PEEK coatings has benefits. [50][51][52] Dispersed spherulites increase coating hardness through restriction of the motions, slippages of the polymer chains. 52 However, the presence of amorphous areas between the lamellas within the spherulites and between them provides the material with a certain elasticity.…”

Section: Resultsmentioning

confidence: 99%

Electrophoretic Deposition, Microstructure and Selected Properties of Composite Alumina/Polyetheretherketone Coatings on the Ti-13Nb-13Zr Alloy

Moskalewicz

Zimowski

Zych

et al. 2018

J. Electrochem. Soc.

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In this work, 45-120 μm thick, composite Al 2 O 3 /PEEK coatings were fabricated on the Ti-13Nb-13Zr alloy substrate using electrophoretic deposition. The anodic co-deposition of alumina and PEEK particles were investigated and discussed. The asdeposited coatings exhibited the uniform distribution of a nearly amorphous PEEK and crystalline alumina powders on the titanium alloy substrate. The morphology of PEEK in the coatings was changed by heating above the PEEK melting point from granular into dense coating matrix with semi-crystalline structure and spherulitic morphology. Scanning and transmission electron microscopy investigation of the coating microstructure revealed the presence of uniformly distributed Al 2 O 3 nanoparticles and their agglomerates within the PEEK matrix. Micro-scratch tests indicated that the coatings are characterized by excellent adhesion to the underlying substrate. The Al 2 O 3 /PEEK coatings significantly improved the wear resistance and reduced coefficient of friction of the Ti-13Nb-13Zr alloy during dry sliding, also in comparison with a polymer PEEK coated alloy. However, the wear resistance of the Al 2 O 3 /PEEK coated alloy during sliding in Ringer's solution was less than the PEEK coated alloy. The coatings increased the corrosion resistance of the alloy in Ringer's solution. The coatings were also found to be cytocompatible with Among biometallic materials, titanium alloys are increasingly used in medicine as implant material, due to their favorable mechanical properties, low elastic modulus, good electrochemical corrosion resistance and relatively good biocompatibility.1-4 Generally, β and near-β (including Ti-13Nb-13Zr) alloys have about 30% lower Young's modulus than that of two phase α+β alloys. 5 In the case of Ti-13Nb-13Zr alloy the elasticity modulus is reduced by Nb, 6 while Zr is neutral for both the α and β phase. The uses of all titanium alloys in applications exposed to abrasive wear in orthopedic surgery and traumatology, for example, in the head and acetabulum of hip endoprostheses, are limited. This is because of their relatively low hardness, low resistance to abrasive wear, high and unstable coefficient of friction (COF), severe adhesive wear and tendency to seize. 1,[7][8][9][10][11][12] Therefore, in order to improve the bio-tribological performance of titanium alloys, surface treatment is necessary.In recent years, polyetheretherketone (PEEK) coatings have often been applied as solid lubricant films in bio-tribosystems because of their notable wear resistance, corrosion resistance and self-lubricating capacity.13,14 PEEK, with a basic formula of (-C6H4-O-C6H4-O-C6H4-CO-)n, is a polyaromatic, semi-crystalline thermoplastic polymer exhibiting a superior combination of strength, stiffness, toughness and good biocompatibility. 15 Numerous studies have confirmed the successful clinical performance of PEEK for in vivo medical device applications, in orthopedic and spine implants. 13,[15][16][17][18] A number of studies [19][20][21] have also been conducted to d...

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Section: Resultsmentioning

confidence: 99%

Electrophoretic Deposition, Microstructure and Selected Properties of Composite Alumina/Polyetheretherketone Coatings on the Ti-13Nb-13Zr Alloy

Moskalewicz

Zimowski

Zych

et al. 2018

J. Electrochem. Soc.

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“…Using this technique powder and substrate are brought to different electric potentials. The powder is charged by electric current through the corona discharge and is sprayed on the grounded substrate [7][8][9]. Subsequently, the layer material is annealed to melt the powder and obtain a covering layer [10,11].…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Pressure Plasma Coating of Wood and MDF with Polyester Powder

et al. 2017

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Abstract:In this study, polyester powder based on iso-and teraphthalic acid was deposited with an atmospheric plasma jet. The powder was fed into the effluent plasma zone and deposited on European beech wood (Fagus sylvatica L.), Grand fir (Abies grandis Lindl.) and medium density fiberboard (MDF). The substrates were annealed subsequent to the coating process. To exclude decomposition of the polyester layers by the plasma treatment, the surface chemistry of the layers has been examined by X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared spectroscopy (FTIR) and compared with the polyester powder reference. Furthermore, topographical investigations were carried out using laser scanning microscopy (LSM). Adhesive strength of the layers was evaluated by dolly test and gloss measurements with a goniophotometer. The deposited layers showed no chemical changes compared to the reference. The adhesive strength of the layer met practical requirements of >1 MPa. It was demonstrated that the deposition of a macroscopic layer is possible without a pretreatment or the usage of additives. Therefore this coating process by atmospheric pressure plasma for wood and wood based materials could represent an environmental-friendly alternative to conventional coating methods.

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“…Hedayati et al [7] observed that semicrystalline pure polyetheretherketone (PEEK) coating exhibited higher hardness and lower adhesion strength, coefficient of friction, and wear rate than the amorphous one. Chen et al [8] investigated the friction and wear behaviors of PEEK/PEI/PES alloys under dry sliding contact condition and reported that wear resistance of the alloys were considerably higher than those of pure polyetherimide (PEI) and polyarylethersulfone (PES).…”

Section: Introductionmentioning

confidence: 99%

Combined effect of the use of carbon fiber and seawater and the molecular structure on the tribological behavior of polymer materials

Wang

Gao

2017

Friction

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Abstract:The combined effect of the use of carbon fiber and seawater and the molecular structure on the tribological behavior of various polymer materials under natural seawater lubrication was investigated. After the investigation, the wear morphology of the contact surface was observed by a laser scanning confocal microscope, and the texture of the wear scars and tracks were presented in 3D profiles. Moreover, the mechanism of mixed lubrication and wear resistance was analyzed. The results demonstrated that the friction coefficient of carbon fiber-reinforced polyetheretherketone (CFRPEEK) is the lowest and fluctuates at approximately 0.11. Moreover, the seven polymer materials in ascending order of friction coefficients are CFRPEEK, carbon fiber-reinforced polyamide-imide, polytetrafluoroethylene, polyoxymethylene, polyetheretherketone (PEEK), acrylonitrile butadiene styrene resin, and glass fiber-epoxy resin. More critically, the simultaneous incorporation of deposition, polymeric scrap, hydrophilic groups, and seawater resulted in a decrease in the friction and wear of polymer materials under seawater lubrication. This observation implies that a synergistic friction-reducing and wear-resistant effect exists between carbon fiber, seawater, and the molecular structure of PEEK. As a result, a highly effective polymer material was discovered, CFRPEEK, which has the lowest friction coefficient of 0.11 and lowest wear rate of 2 × 10 -5 mm 3 ·(N·m) −1 among the polymer materials; this validates the selection of dual friction pairs for seawater hydraulic components.

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Tribological and mechanical properties of amorphous and semi-crystalline PEEK/SiO2 nanocomposite coatings deposited on the plain carbon steel by electrostatic powder spray technique

Cited by 51 publications

References 34 publications

Electrophoretic Deposition, Microstructure and Selected Properties of Composite Alumina/Polyetheretherketone Coatings on the Ti-13Nb-13Zr Alloy

Electrophoretic Deposition, Microstructure and Selected Properties of Composite Alumina/Polyetheretherketone Coatings on the Ti-13Nb-13Zr Alloy

Atmospheric Pressure Plasma Coating of Wood and MDF with Polyester Powder

Combined effect of the use of carbon fiber and seawater and the molecular structure on the tribological behavior of polymer materials

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