Preparation and characterization of spark-anodized Al-alloys: Physical, chemical and tribological properties

Godja, Norica; Kiss, Nóra Zsuzsa; Löcker, Ch.; Schindel, Andreas; Gavrilović, Aleksandar; Wosik, J.; Mann, R. F.; Wendrinsky, J.; Merstallinger, A.; Nauer, Gerhard

doi:10.1016/j.triboint.2010.01.007

Cited by 40 publications

(33 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although there are several studies on 7000 series Al alloys, the effect of Zn on MAO coating properties is not clear [14,15,[22][23][24]. In this study it is aimed to reveal the specific effect of Zn on MAO coating properties of Al-Zn binary alloys.…”

Section: Introductionmentioning

confidence: 99%

The effect of Zn on the microarc oxidation coating behavior of synthetic Al–Zn binary alloys

Güleç

2012

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

The effect of Zn on the microarc oxidation coating behavior of synthetic Al–Zn binary alloys

Güleç

2012

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…The pure aluminum is not suggested to be used as structural parts since it does not result in satisfactory mechanical strength. Hence, in practical applications, it is essential to improve the surface properties, especially prior to aluminum coming in contact with other parts [33,34].…”

Section: Cover Platementioning

confidence: 99%

A Study on Surface Modification of Al7075-T6 Alloy against Fretting Fatigue Phenomenon

Mohseni

Zalnezhad

Sarhan

et al. 2014

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

Aircraft engines, fuselage, automobile parts, and energy saving strategies in general have promoted the interest and research in the field of lightweight materials, typically on alloys based on aluminum. Aluminum alloy itself does not have suitable wear resistance; therefore, it is necessary to enhance surface properties for practical applications, particularly when aluminum is in contact with other parts. Fretting fatigue phenomenon occurs when two surfaces are in contact with each other and one or both parts are subjected to cyclic load. Fretting drastically decreases the fatigue life of materials. Therefore, investigating the fretting fatigue life of materials is an important subject. Applying surface modification methods is anticipated to be a supreme solution to gradually decreasing fretting damage. In this paper, the authors would like to review methods employed so far to diminish the effect of fretting on the fatigue life of Al7075-T6 alloy. The methods include deep rolling, shot peening, laser shock peening, and thin film hard coatings. The surface coatings techniques are comprising physical vapor deposition (PVD), hard anodizing, ion-beam-enhanced deposition (IBED), and nitriding.

show abstract

“…Brake rotors with PEO coatings obtained from alkaline electrolytes provided satisfactory thermal stability, but a relatively low (0.25–0.3) coefficient of friction against organic-based friction materials (LowMet) [16,17]. Some reports quote friction coefficients as high as 0.8, but these values are usually observed in the beginning of the test, and subsequently drop to 0.5 [18], whereas in others, the sliding distances appear too short to accurately estimate whether the high values of the friction coefficient were able to remain in the long run [19,20]. More typically, the authors of reference [19] provided average friction coefficients for PEO coatings with thicknesses of 100 to 250 µm, as 0.64–0.68 and 0.68–0.86 versus bearing steel and tungsten carbide balls, respectively.…”

Section: Introductionmentioning

confidence: 99%

Wear Resistant Coatings with a High Friction Coefficient Produced by Plasma Electrolytic Oxidation of Al Alloys in Electrolytes with Basalt Mineral Powder Additions

et al. 2019

View full text Add to dashboard Cite

To achieve a better performance of engineering components, modern design approaches consider the replacement of steel with lightweight metals, such as aluminum alloys. However, bare aluminum cannot satisfy requirements for surface properties in situations where continuous friction is needed. Among the various surface modification techniques, plasma electrolytic oxidation (PEO) is considered as promising for structural applications, owing to its hard and well-adhered ceramic coatings. In this work, the surfaces of two Al alloys (2024 and 6061) have been modified by PEO coating (~180 µm) reinforced with basalt minerals, in order to increase the coefficient of friction and wear resistance. A slurry electrolyte, including a silicate-alkaline solution with addition of basalt mineral powder (<5 µm) has been used. The coating composition, surface morphology, and microstructure were studied using X-ray diffraction, scanning electron, and optical microscopy. Linear reciprocating wear tests were employed for the evaluation of the friction and wear behavior. It was found that the coatings reinforced with basalt mineral showed that the wear and friction coefficients reached values 10−6–10−7 (mm3 N−1 m−1) and 0.7–0.85, correspondingly (sliding distance of 100 m). In comparison with the characteristics of resin-based materials (10−5–10−4 (mm3 N−1 m−1) and 0.3–0.5, respectively), the employment of thin inorganic frictional composites may bring considerable improvement in the thermal stability, durability, and compactness, as well as a reduction in the weight of the final product. These coatings are considered an alternative to the reinforced resin composite materials on steel used in frictional components, for example, clutch disks and braking pads. It is expected that the smaller thickness of the active frictional material (180 μm) reduces the volume of the wear products, extending the service intervals associated with filter and lubricant maintenance.

show abstract

Preparation and characterization of spark-anodized Al-alloys: Physical, chemical and tribological properties

Cited by 40 publications

References 17 publications

The effect of Zn on the microarc oxidation coating behavior of synthetic Al–Zn binary alloys

The effect of Zn on the microarc oxidation coating behavior of synthetic Al–Zn binary alloys

A Study on Surface Modification of Al7075-T6 Alloy against Fretting Fatigue Phenomenon

Wear Resistant Coatings with a High Friction Coefficient Produced by Plasma Electrolytic Oxidation of Al Alloys in Electrolytes with Basalt Mineral Powder Additions

Contact Info

Product

Resources

About