Influence of alumina and zirconia incorporations on the structure and wear resistance of titania-based MAO coatings

Muhaffel, Faiz; Kaba, Mertcan; Cempura, Grzegorz; Derin, Bora; Kruk, Adam; Atar, Erdem; Çi̇menoǧlu, Hüseyin

doi:10.1016/j.surfcoat.2019.124900

Cited by 53 publications

(21 citation statements)

References 33 publications

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“…The resulting Si 2p spectrum of the MA01-blasting sample (Fig. 3E) confirms-based on the binding energy value of 104.1 eV-the presence of SiO 2 , in correlation with the peak in the O 1s spectrum located around the value of 532.3 eV 26 According to Muhaffel et al 27 , the development of amorphous SiO 2 in MAO coatings occurs in connection with a low cooling rate. The visible shift of the peak of the Si 2p MA01 spectrum may be related to the inhomogeneity of the coating and to the presence of SiO 2 grains (insulator), which may cause different charging of individual components of the coating.…”

Section: Figure 2 (A)supporting

confidence: 70%

Preparation of highly wettable coatings on Ti–6Al–4V ELI alloy for traumatological implants using micro-arc oxidation in an alkaline electrolyte

Gabor

Doubková

Gorosova

et al. 2020

Sci Rep

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Pulsed micro-arc oxidation (MAO) in a strongly alkaline electrolyte (pH > 13), consisting of Na2SiO3⋅9H2O and NaOH, was used to form a thin porous oxide coating consisting of two layers differing in chemical and phase composition. The unique procedure, combining MAO and removal of the outer layer by blasting, enables to prepare a coating suitable for application in temporary traumatological implants. A bilayer formed in an alkaline electrolyte environment during the application of MAO enables the formation of a wear-resistant layer with silicon incorporated in the oxide phase. Following the removal of the outer rutile-containing porous layer, the required coating properties for traumatological applications were determined. The prepared surfaces were characterized by scanning electron microscopy, X-ray diffraction patterns, X-ray photoelectron spectroscopy, atomic force microscopy and contact angle measurements. Cytocompatibility was evaluated using human osteoblast-like Saos-2 cells. The newly-developed surface modifications of Ti–6Al–4V ELI alloy performed satisfactorily in all cellular tests in comparison with MAO-untreated alloy and standard tissue culture plastic. High cell viability was supported, but the modifications allowed only relatively slow cell proliferation, and showed only moderate osseointegration potential without significant support for matrix mineralization. Materials with these properties are promising for utilization in temporary traumatological implants.

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Section: Figure 2 (A)supporting

confidence: 70%

Preparation of highly wettable coatings on Ti–6Al–4V ELI alloy for traumatological implants using micro-arc oxidation in an alkaline electrolyte

Gabor

Doubková

Gorosova

et al. 2020

Sci Rep

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“…The most commonly added particles are various oxides including TiO 2 , Al 2 O 3 , SiO 2 , CeO 2 , ZrO 2 , etc. [ 189 ]. The particles can achieve either reactive or inert incorporation into the coating while imparting excellent properties to the coating.…”

Section: Coatings For Ni- and Ti-based Alloys For Aerospace Enginementioning

confidence: 99%

Critical Raw Materials Saving by Protective Coatings under Extreme Conditions: A Review of Last Trends in Alloys and Coatings for Aerospace Engine Applications

et al. 2021

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Several applications where extreme conditions occur require the use of alloys often containing many critical elements. Due to the ever increasing prices of critical raw materials (CRMs) linked to their high supply risk, and because of their fundamental and large utilization in high tech products and applications, it is extremely important to find viable solutions to save CRMs usage. Apart from increasing processes’ efficiency, substitution, and recycling, one of the alternatives to preserve an alloy and increase its operating lifetime, thus saving the CRMs needed for its manufacturing, is to protect it by a suitable coating or a surface treatment. This review presents the most recent trends in coatings for application in high temperature alloys for aerospace engines. CRMs’ current and future saving scenarios in the alloys and coatings for the aerospace engine are also discussed. The overarching aim of this paper is to raise awareness on the CRMs issue related to the alloys and coating for aerospace, suggesting some mitigation measures without having the ambition nor to give a complete overview of the topic nor a turnkey solution.

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“…COF was an important index to evaluate the friction-wear performance of the coatings. Figure 7 shows the curves of COFs versus the wear time of the substrate and the NiMo-TiC coatings, and the wear process was divided into runningin and stable wear periods [29,30]. The average COFs of the substrate and the NiMo-5%TiC, nd substrate presented a downward trend.…”

Section: Cof Analysismentioning

confidence: 99%

Microstructure, tribological performances, and wear mechanisms of laser-cladded TiC-reinforced NiMo coatings under grease-lubrication condition

Zhu

Dejun

2021

Materials Science-Poland

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NiMo-5%TiC, NiMo-15%TiC, and NiMo-25%TiC coatings were prepared on GCr15 steel by laser cladding (LC). The microstructure and the phases of the obtained coatings were analyzed using ultra-depth-of-field microscopy (UDFM) and X-ray diffraction (XRD), respectively. A ball-on-disk wear test was used to analyze the friction-wear performance of the substrate and the NiMo-TiC coatings under grease-lubrication condition. The results show that the grain shape of NiMo-TiC coatings is dendritic. The wear resistance of NiMo-TiC coatings is improved by the addition of TiC, and the depths of the worn tracks on the substrate and on the NiMo-5%TiC, NiMo-15%TiC, and NiMo-25%TiC coatings are 4.183 μm, 2.164 μm, 1.882 μm, and 1.246 μm, respectively, and the corresponding wear rates are 72.25 μm3/s/N, 32.00 μm3/s/N, 18.10 μm3/s/N, and 7.99 μm3/s/N, respectively; this shows that the NiMo-25%TiC coating has the highest wear resistance among the three kinds of coatings. The wear mechanism of NiMo-TiC coatings is abrasive wear, and the addition of TiC plays a role in resisting wear during the friction process.

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Influence of alumina and zirconia incorporations on the structure and wear resistance of titania-based MAO coatings

Cited by 53 publications

References 33 publications

Preparation of highly wettable coatings on Ti–6Al–4V ELI alloy for traumatological implants using micro-arc oxidation in an alkaline electrolyte

Preparation of highly wettable coatings on Ti–6Al–4V ELI alloy for traumatological implants using micro-arc oxidation in an alkaline electrolyte

Critical Raw Materials Saving by Protective Coatings under Extreme Conditions: A Review of Last Trends in Alloys and Coatings for Aerospace Engine Applications

Microstructure, tribological performances, and wear mechanisms of laser-cladded TiC-reinforced NiMo coatings under grease-lubrication condition

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