Mechanical and tribological properties of oxide layers obtained on titanium in the thermal oxidation process

Aniołek, Krzysztof; Kupka, M.; Barylski, Adrian; Dercz, Grzegorz

doi:10.1016/j.apsusc.2015.09.245

Cited by 59 publications

(33 citation statements)

References 20 publications

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“…The presented methods were described in more detail in the work of Paital and Dahotre [17]. Thus, one of the methods of coatings application used to increase wear resistance is thermal oxidation, which allows forming a durable rutile layer and an oxygen-saturated titanium sublayer on the interface coating/substrate that significantly improves tribological properties details as a whole [18][19][20][21][22]. However, taking into account the composition of the thermal oxide layer, the biocompatibility of this coating remains in question.…”

Section: Introductionmentioning

confidence: 99%

Bioactive Coatings Formed on Titanium by Plasma Electrolytic Oxidation: Composition and Properties

et al. 2020

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Bioactive coatings on VT1-0 commercially pure titanium were formed by the plasma electrolytic oxidation (PEO). A study of the morphological features of coatings was carried out using scanning electron microscopy. A composition of formed coatings was investigated using energy-dispersive spectroscopy and X-ray diffractometry analysis. It was shown that PEO-coatings have calcium phosphate in their composition, which increases the bioactivity of the surface layer. Electrochemical properties of the samples were studied by potentiondynamic polarization and electrochemical impedance spectroscopy in different physiological media: simulated body fluid and minimum essential medium. The data of electrochemical studies indicate more than 15 times decrease in the corrosion current density for the sample with coating (5.0 × 10−9 A/cm2) as compared to the bare titanium (7.7 × 10−8 A/cm2). The formed PEO-layers have elastoplastic properties close to human bone (12–30 GPa) and a lower friction coefficient in comparison with bare metal. The wettability of PEO-layers increased. The contact angle for formed coatings reduced by more than 60° in comparison with bare metal (from 73° for titanium to 8° for PEO-coating). Such an increase in surface hydrophilicity contributes to the greater biocompatibility of the formed coating in comparison with commercially pure titanium. PEO can be prospective as a method for improving titanium surface bioactivity.

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Section: Introductionmentioning

confidence: 99%

Bioactive Coatings Formed on Titanium by Plasma Electrolytic Oxidation: Composition and Properties

et al. 2020

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“…In addition, it was found that the oxidation parameters (both time and temperature) had a significant influence on the thickness of the oxides formed. Previous studies by the authors [ 19 ] showed that the oxidation process was consistent with a parabolic curve and its intensity increased primarily as the oxidation temperature increased. In paper [ 20 ], it was affirmed that in such conditions, passive oxidation takes place on the surface (the oxides formed tended to remain linked on the surface and did not evaporate).…”

Section: Resultsmentioning

confidence: 77%

The Tensile Properties, Scratch Behaviors and Sliding Wear of Oxide Scale Formed on Titanium Grade 2

et al. 2020

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The tensile properties, scratch behaviors and sliding wear of an oxide scale obtained on the surface of titanium Grade 2 in the process of isothermal oxidation at 600, 700 and 800 °C were determined in the study. It was shown that the intensity of the oxidation process increased along with an increase in temperature and extension of the oxidation time, which translated directly into the thickness of the deposited oxide layers. The tests showed that isothermal oxidation had an adverse effect on the tensile properties of titanium. After oxidation, it was found that the maximum reduction in tensile strength, Rm, was approximately 17.5%, and of the yield point, Rp0.2, approximately 13.9%. Examination of scratch behaviors of the oxide scale showed that the layers obtained at temperatures of 700 (72 h) and 800 °C (2 and 6 h) had the best adhesion properties. The best resistance to scratching was exhibited by the layer obtained after 6 h oxidation at 800 °C (critical load: Lc1 = 63 N, Lc2 = 85 N). The study showed that after oxidation, a considerable reduction in wear factor of a disc made of titanium Grade 2 was observed for both the friction couples used (Al2O3, steel 100Cr6). The maximum reduction in wear factor of the oxidized titanium disc during interaction with Al2O3 balls was ca. 79%, and with 100Cr6 balls, ca. 96%.

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“…Bunun sebebi olarak, alüminyumun oksijene olan afinitesine bağlanabilir. Yapılan literatür [15,16] çalışmalarında da benzer sonuçlar çıktığı tespit edilmiştir.…”

Section: Deney Sonuçlarının Değerlendirilmesiunclassified

Ti6Al4V Alaşımı ve Saf Titanyumun (Cp-Ti) Oksidasyon Kinetiği

Ayday

2020

El-Cezeri Fen Ve Mühendislik Dergisi

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72 saat sürelerinde oksidasyon kinetiği davranışları incelenmiştir. Oksidasyon işlemi sonrası numune yüzeyleri X-ışınları difraksiyonu (XRD), taramalı elektron mikroskobu (SEM) yardımı ile incelenmiştir. Termal oksidasyon sonrasında yüzeylerde ince oksit tabakası oluşmuş ve metal içerisine oksijen difüzyonu gerçekleşmiştir. Oluşan oksit tabakası rutil ve anatas formundaki TiO 2 'dir. Yüzeyde oluşan oksit tabakasının kalınlığı, sıcaklık ve süreye bağlı olarak artmaktadır. Oksidasyona uğratılan numunelerin aktivasyon enerjileri hesaplanmıştır. Ti6Al4V için oksidasyon aktivasyon enerjisi 201.3kJ/mol, Cp-Ti için ise 269.4kJ/mol hesaplanmıştır.

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Mechanical and tribological properties of oxide layers obtained on titanium in the thermal oxidation process

Cited by 59 publications

References 20 publications

Bioactive Coatings Formed on Titanium by Plasma Electrolytic Oxidation: Composition and Properties

Bioactive Coatings Formed on Titanium by Plasma Electrolytic Oxidation: Composition and Properties

The Tensile Properties, Scratch Behaviors and Sliding Wear of Oxide Scale Formed on Titanium Grade 2

Ti6Al4V Alaşımı ve Saf Titanyumun (Cp-Ti) Oksidasyon Kinetiği

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