Mechanical and tribological properties of anodic Al coatings as a function of anodizing conditions

Dervishi, Enkeleda; McBride, Michael; Edwards, Randall; Gutierrez, Moraya; Li, Nan; Buntyn, Raven; Hooks, Daniel E

doi:10.1016/j.surfcoat.2022.128652

Cited by 20 publications

(18 citation statements)

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“…In the graph of the coefficient of friction shown in Figure 9 , the initial course of friction was attributed to the initial oxide layer, which was then systematically removed [ 20 ]. The initial lower friction coefficient values were mainly due to two factors.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the protection against the corrosive environment is lost [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. Biotribology deals with the search for minimizing the effects of friction, which would involve reducing the wear of the surfaces involved in the friction of the elements and reducing the energy accompanying the process [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Anodizing Conditions on Biotribological and Micromechanical Properties of Ti–13Zr–13Nb Alloy

et al. 2023

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The biomedical Ti–13Zr–13Nb bi-phase (α + β) alloy for long-term applications in implantology has recently been developed. The porous oxide nanotubes’ (ONTs) layers of various geometries and lengths on the Ti–13Zr–13Nb alloy surface can be produced by anodizing to improve osseointegration. This work was aimed at how anodizing conditions determinatine the micromechanical and biotribological properties of the Ti–13Zr–13Nb alloy. First-generation (1G), second-generation (2G), and third-generation (3G) ONT layers were produced on the Ti–13Zr–13Nb alloy surface by anodizing. The microstructure was characterized using SEM. Micromechanical properties were investigated by the Vickers microhardness test under variable loads. Biotribological properties were examined in Ringer’s solution in a reciprocating motion in the ball-on-flat system. The 2D roughness profiles method was used to assess the wear tracks of the tested materials. Wear scars’ analysis of the ZrO2 ball was performed using optical microscopy. It was found that the composition of the electrolyte with the presence of fluoride ions was an essential factor influencing the micromechanical and biotribological properties of the obtained ONT layers. The three-body abrasion wear mechanism was proposed to explain the biotribological wear in Ringer’s solution for the Ti–13Zr–13Nb alloy before and after anodizing.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Anodizing Conditions on Biotribological and Micromechanical Properties of Ti–13Zr–13Nb Alloy

et al. 2023

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“…При применении технологий упрочнения поверхностных слоев деталей на поверхности материала создаются функциональные слои (покрытия) на основе таких металлов, как например Cr, Ti, W, Al, Mo, Ni, и/или их химических соединений с углеродом или азотом [5][6][7][8]. Подобные покрытия имеют кристаллическую структуру и позволяют варьировать в широком диапазоне такими свойствами поверхностных слоев конструкционных сталей, как твердость, коррозионная стойкость, износостойкость и т. д. При этом стоит отдельно выделить покрытия на основе хрома.…”

Section: *адрес для перепискиunclassified

Diffusion coatings formation features, obtained by complex chemical-thermal treatment on the structural steels

Соколов¹,

Bobylyov²,

Popov³

2023

Metal Working and Material Science

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Introduction. The main methods of increasing the efficiency of products made from structural steels are considered. A description of diffusion saturation from liquid metal media solutions (DSLMMS) is given. Also, complex diffusion saturation technology (CDS), including DSLMMS and carburization is shown. The purpose of the work is to reveal the effect of steel composition on the process of formation and elemental composition of diffusion-saturated surface layers (coatings) based on chromium, as well as to establish differences and regularities in the processes of formation of diffusion-saturated coatings after DSLMMS and CDS. The methods of investigation. Cylindrical specimens 20 mm in diameter and 30 mm long were subjected to DSLMMS. The specimens were made of carbon and alloyed steels: St3, 20-Cr13, 40-Cr, 40-Cr13, 12-Cr18-Ni10-Ti. At the same time, some of the specimens were previously subjected to vacuum cementation. An eutectic Pb-Bi with the specified content of Cr was used as a transport medium when executing DSLMMS. Metallographic studies were carried out on microsection prepared according to the standard method. Studies to determine the thickness of coatings and its structure were carried out on the Dura Scan Falcon 500 Microhardness Tester. The elemental composition of the coatings was determined by the method of electron microprobe analysis on a Tescan Lyra 3 scanning electron microscope with the Oxford Ultim MAX PCMA system. Results and discussion. As a result of the research, it was revealed that the formation of saturated coatings occurs with DSLMMS and CDS. At the same time, the thickness of the coatings and its elemental composition depend on the steel grade and the technology used. After DSLMMS concentration of Cr varies from 96.9% to 91.1%. At the same time, the maximum concentration of 96.9% is observed on steel St3. After CDS, on the surfaces of all steel samples, the concentration of Cr decreases in comparison with the coatings obtained by the DSLMMS technology on steels: St3 from 96.9% to 66.8%; 40-Cr from 91.1% to 63.18%; 20-Cr13 from 93.18% to 62.54%; 12-Cr18-Ni10-Ti from 92.92% to 64.77%. The total thickness of diffusion-saturated coatings formed on all the alloys studied ranges from 17 to 17.5 µm.

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“…Anodic oxidation is carried out by attracting the negatively charged oxygen ions to the anode, which is the positive pole and forming a reaction on the aluminum surface [4]. Anodic oxidation is often used to obtain oxide coatings on aluminum surfaces [5]. Different types of electrolytes and anodizing processes are used according to the place of use of aluminum and the alloy type of aluminum used.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to many superior properties (such as high corrosion resistance, light weight), weak tribological and interfacial mechanical properties also create some disadvantages [14]. To improve the low tribological properties of the Al alloy, anodic oxidation, which is a protective oxide coating, is one of the methods used [5,[15][16][17]. Studies on such coatings are carried out to improve the mechanical properties and tribological of aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of Anodic Oxidation on Tribological Behavior of 2017A Alloy

Akıncıoğlu

2023

Journal of Polytechnic

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Anodic oxidation is used to improve the wear resistance and surface properties of aluminum alloys. In this study, the effect of two different anodic oxidation (hard anodizing and phosphoric coating) on the wear properties of 2017A aluminum alloy used as a model aircraft engine piston was investigated. In order to determine the effect of anodic oxidation, microhardness, friction coefficient, wear resistance, vibration, and worn surface images of the samples were evaluated. It was concluded that anodic oxidation significantly improved the hardness, friction coefficient, and wear resistance of the samples.

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Mechanical and tribological properties of anodic Al coatings as a function of anodizing conditions

Cited by 20 publications

References 61 publications

Influence of Anodizing Conditions on Biotribological and Micromechanical Properties of Ti–13Zr–13Nb Alloy

Influence of Anodizing Conditions on Biotribological and Micromechanical Properties of Ti–13Zr–13Nb Alloy

Diffusion coatings formation features, obtained by complex chemical-thermal treatment on the structural steels

Effect of Anodic Oxidation on Tribological Behavior of 2017A Alloy

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