Tribological effects of pores on an anodized Al alloy surface as lubricant reservoir

Lee, Gyu-Sun; Choi, Jeong Hee; Choi, Yongjun; Bu, Sang Don; Lee, Young-Ze

doi:10.1016/j.cap.2011.03.057

Cited by 31 publications

(19 citation statements)

References 17 publications

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“…The porosity of the anodic oxide layers was found to be beneficial for tribological applications, being used as a reservoir for lubricants to form self-lubricating structures, enhancing the friction and wear performances [22][23][24]. Extensive studies on the wear resistance of filled-in anodic aluminum oxide (AAO), as well as filled-up with solid or liquid lubricants, have been carried out [15,[25][26][27][28][29][30][31], but not many papers deal with the wear properties of anodized aluminum alloys under a dry (non-lubricated) environment [14,[32][33][34][35][36][37]. It is even harder to find a paper that investigated the dry sliding performance of hard anodized aluminum under medium normal loads (between 1 and 10 N).…”

Section: Introductionmentioning

confidence: 99%

Dry Sliding Tribological Properties of a Hard Anodized AA6082 Aluminum Alloy

Santecchia

Cabibbo

Musharavati

et al. 2020

Metals

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The applications of aluminum and its alloys are still limited by low hardness and low wear resistance properties. Surface modifications, such anodizing and plasma electrolytic oxidation, represent a feasible way to overcome these drawbacks. In this study, discs of AA6082 were subjected to the so-called G.H.A. hard anodizing process leading to an anodized layer having a honeycomb-like structure. Samples having alumina layer thicknesses of 10, 50 and 100 μm were subjected to unidirectional dry sliding wear tests, using bearing steel and silicon nitride as counterbody materials. Surface and structure characterization of the samples were performed before and after the tribological tests, using a wide range of techniques; atomic force microscopy and scanning electron microscopy techniques were used before the wear tests. The wear scars were characterized by scanning electron microscopy, energy dispersive spectroscopy and Fourier transform infrared spectroscopy techniques. Results show that the different thickness of the anodized layer does not affect the pores dimensions but has an influence on the micrometric domains in which the pores are divided. These features coupled with the wear test conditions, show to have a strong influence on the wear behavior. The thinnest sample showed also the best performance against the ceramic counterbody.

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Section: Introductionmentioning

confidence: 99%

Dry Sliding Tribological Properties of a Hard Anodized AA6082 Aluminum Alloy

Santecchia

Cabibbo

Musharavati

et al. 2020

Metals

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“…In recent years, the tribological behavior of porous surfaces has been studied in numerous investigations. These works have demonstrated the positive influence of porosity on the tribological behavior of different ceramics [7], composites [8, 9] and metal alloys [10, 11], by trapping wear debris and acting as oil reservoirs, resulting in an improved wear resistance and lower friction coefficient.…”

Section: Introductionmentioning

confidence: 99%

Tribological and thermal stability study of nanoporous amorphous boron carbide films prepared by pulsed plasma chemical vapor deposition

Liza

Ohtake

Akasaka

et al. 2015

Science and Technology of Advanced Materials

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In this work, the thermal stability and the oxidation and tribological behavior of nanoporous a-BC:H films are studied and compared with those in conventional diamond-like carbon (DLC) films. a-BC:H films were deposited by pulsed plasma chemical vapor deposition using B(CH3)3 gas as the boron source. A DLC interlayer was used to prevent the a-BC:H film delamination produced by oxidation. Thermal stability of a-BC:H films, with no delamination signs after annealing at 500 °C for 1 h, is better than that of the DLC films, which completely disappeared under the same conditions. Tribological test results indicate that the a-BC:H films, even with lower nanoindentation hardness than the DLC films, show an excellent boundary oil lubricated behavior, with lower friction coefficient and reduce the wear rate of counter materials than those on the DLC film. The good materials properties such as low modulus of elasticity and the formation of micropores from the original nanopores during boundary regimes explain this better performance. Results show that porous a-BC:H films may be an alternative for segmented DLC films in applications where severe tribological conditions and complex shapes exist, so surface patterning is unfeasible.

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“…Lee et al [ 15 ] have used ball-on-disk wear tests to study the tribological behavior of porous anodic alumina. They have concluded that water stored inside the pore has great effect when it is released during sliding by elastic-plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Test Parameters on the Friction Behaviour of Anodized Aluminium Alloy

Guezmil

Bensalah

Khalladi

et al. 2014

International Scholarly Research Notices

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The tribological behaviour of anodic oxide layer formed on Al5754, used in automotive applications, was investigated against test parameters. The friction coefficient under different normal loads, sliding speeds, and oxide thicknesses was studied using a pin on disc tribometer. Results show that the increase of load and sliding speed increase the friction coefficient. The rise of contact pressure and temperature seems to cause changes in wear mechanism. Glow-discharge optical emission spectroscopy (GDOES) was used to investigate the chemical composition of the oxide layer. Morphology and composition of the wear tracks were analyzed by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). On the basis of these characterization techniques, a wear mechanism was proposed. The observed mechanical properties can be related to the morphology and the chemical composition of the layer.

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Tribological effects of pores on an anodized Al alloy surface as lubricant reservoir

Cited by 31 publications

References 17 publications

Dry Sliding Tribological Properties of a Hard Anodized AA6082 Aluminum Alloy

Dry Sliding Tribological Properties of a Hard Anodized AA6082 Aluminum Alloy

Tribological and thermal stability study of nanoporous amorphous boron carbide films prepared by pulsed plasma chemical vapor deposition

Effect of Test Parameters on the Friction Behaviour of Anodized Aluminium Alloy

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