Preparation of ceramic coatings on an Al–Si alloy by the incorporation of ZrO2 particles in microarc oxidation

Hu, Cui-E; Hsieh, Ming-Han

doi:10.1016/j.surfcoat.2014.09.012

Cited by 52 publications

(12 citation statements)

References 19 publications

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“…Regarding the Aluminum PEO, reports in the literature have described the incorporation of particles into the oxide coating from the electrolyte to enhance their corrosion resistance, wear, and tribological properties [12][13][14][15], catalytic activity [16][17][18], magnetic properties [19,20], and antimicrobial properties [21][22][23][24][25][26]. Studies that focus on improving the corrosion resistance and tribological properties reported the use of carbon-based additives [12,13] and α-Al 2 O 3 [14], and ZrO 2 [15] powders in the electrolyte. In addition, W, Co, and Ni species are reported as an additive in PEO electrolytes to improve the catalytic properties of alumina coatings in thiophene oxidation [16] and CO conversion to CO 2 [17,18].…”

Section: Introductionmentioning

confidence: 99%

Anodization Time Effect on Silver Particles Deposition on Anodic Oxide Coating over Al Produced by Plasma Electrolytic Oxidation

Trivinho‐Strixino

Delgado-Silva

Santos

et al. 2023

Plasma

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In this study, 6061 Al alloy was galvanostatically anodized under the Plasma Electrolytic Oxidation (PEO) condition. A factorial design of 22 was carried out using two variables (anodization time and presence of silver in the electrolyte) on two levels, i.e., 20 and 60 min of anodization and the absence/presence of silver ions in the electrolyte. The Al anodization was performed in sodium silicate electrolyte, applying a constant current density of 20 mA cm−2. The oxide characterization was performed by Scanning Electron Microscopy (SEM), surface roughness analysis (RMS), Energy Dispersive Spectroscopy (EDS), Rutherford Backscattered Spectroscopy (RBS), and Grazing Incidence X-ray Diffraction (GIXRD). The SEM micrographs revealed an irregular porous structure with cracks on the oxide surface composed of a thin crystalline layer of γ-Al2O3 over the Al substrate. From EDS and RBS analysis, it was possible to identify the elements Al, O, Si, Ag, and Na, demonstrating that a shorter anodization time (20 min) led to a significant amount of silver deposits on the outer layer of the oxide coating, mainly deposited in the surroundings of the pores. Conversely, the silver content on the PEO film anodized for 60 min was meager. These results demonstrated that the anodization time was the critical control variable for the amount of silver deposited over the oxide film. The shorter the anodizing time, the higher the silver content on the PEO coating.

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Section: Introductionmentioning

confidence: 99%

Anodization Time Effect on Silver Particles Deposition on Anodic Oxide Coating over Al Produced by Plasma Electrolytic Oxidation

Trivinho‐Strixino

Delgado-Silva

Santos

et al. 2023

Plasma

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“…[3][4][5] Many elements in electrolytes, such as Ca, P and Sr, can be added to Ti coating to increase its bioactivity. 6,7 In addition, its multi-microporous structure can achieve long-term stable release of metal ions. 8 Chen et al reported that crystalline hydroxyapatite (HA) can be obtained directly by MAO.…”

Section: Introductionmentioning

confidence: 99%

<p>Influence of Simvastatin-Strontium-Hydroxyapatite Coated Implant Formed by Micro-Arc Oxidation and Immersion Method on Osteointegration in Osteoporotic Rabbits</p>

Zhao

et al. 2020

IJN

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Enhancing osteointegration of implants in osteoporosis patients is a necessity since implantations frequently fail in these patients. The aim of this work is to study how simvastatin-strontium-hydroxyapatite coated implants perform in rabbits with osteoporosis. Materials and Methods: Crystalline HA and Sr-HA oxide film were prepared through micro-arc oxidation. Surface characterization including morphology, roughness, element composition, phase composition, hydrophilicity were then evaluated. Simvastatin loaded on porous films through immersion, and the effects of coatings on osteointegration in osteoporotic rabbits were investigated. All samples were obtained after 4, 8 and 12 weeks of healing. Some of them were subjected to biomechanical tests and others were subjected to histological and histomorphometric analysis. Results: Coatings exhibited a microporous network structure with appropriate roughness and high hydrophilicity. Compared to control HA and machined surface implants, simvastatin-Sr-HA coated implants exhibited marked improvements in osteointegration, which is characterized by a quicker mineralization deposition rate, good bone formation mode (large amount of contact osteogenesis and a small amount of distance osteogenesis) and increased bone-to-implant contact and pull-out strength. Conclusion: These biological parameters demonstrate the excellent osteoconductivity of simvastatin-Sr-HA coatings in the osteoporotic state. Overall, this suggests that simvastatin-Sr-HA coatings would be applicable in poor-quality bones of patients experiencing osteoporosis.

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“…Generally, an increasing number of colorful films on several metallic materials by the micro-arc oxidation (MAO) treatment have been created [16][17][18]. For Al alloys, Li et al [19] prepared a black MAO film on the LY12 Al alloy derived from the silicate electrolyte embracing NH 4 VO 3 .…”

Section: Introductionmentioning

confidence: 99%

The Preparation and Properties of the Brown Film by Micro-arc Oxidized on In-Situ TiB2/7050Al Matrix Composites

et al. 2020

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The brown or grayish-white color films were prepared by the micro-arc oxidation (MAO) method on in-situ TiB2/7050Al composites using these alkaline electrolytes with/without KMnO4 as an additive. The microstructure, elemental composition, chemical state and corrosion behavior have been investigated by the microstructure characterizations and electrochemistry measurements on the MAO films comparatively. The results indicated that a brown film was obtained via adding KMnO4 into the alkaline electrolyte. The coloration mechanism of the brown color can be ascribed to the existence of MnO inside the film. Furthermore, the initiation of corrosion to the Al composite was intensively hindered by the brown MAO film. Compared with the Al substrate and grayish-white film, the brown MAO film exhibited the elevated corrosion potential and reduced corrosion current. Therefore, the brown film has presented an optimized corrosion resistance for the composite.

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Preparation of ceramic coatings on an Al–Si alloy by the incorporation of ZrO2 particles in microarc oxidation

Cited by 52 publications

References 19 publications

Anodization Time Effect on Silver Particles Deposition on Anodic Oxide Coating over Al Produced by Plasma Electrolytic Oxidation

Anodization Time Effect on Silver Particles Deposition on Anodic Oxide Coating over Al Produced by Plasma Electrolytic Oxidation

<p>Influence of Simvastatin-Strontium-Hydroxyapatite Coated Implant Formed by Micro-Arc Oxidation and Immersion Method on Osteointegration in Osteoporotic Rabbits</p>

The Preparation and Properties of the Brown Film by Micro-arc Oxidized on In-Situ TiB2/7050Al Matrix Composites

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