The pore-enlargement and self-lubrication treatment of anodic oxide film of aluminum

Xu, Tao; Chen, Jianmin; Zhao, Jun; Dang, Hongyue

doi:10.1016/0043-1648(95)06904-6

Cited by 23 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To resolve this problem, investigations into enlarging the pore diameter and filling the pores with a suitable lubricating material were carried out by Tao et al . [110]. The study revealed that the lubricant (MoS 2 ) produced in the pores of the oxide layer had little or no effect in reducing the frictional resistance.…”

Section: Applications Of Aao Layers and Membranesmentioning

confidence: 99%

Progress in Nano-Engineered Anodic Aluminum Oxide Membrane Development

2011

View full text Add to dashboard Cite

Abstract:The anodization of aluminum is an electro-chemical process that changes the surface chemistry of the metal, via oxidation, to produce an anodic oxide layer. During this process a self organized, highly ordered array of cylindrical shaped pores can be produced with controllable pore diameters, periodicity and density distribution. This enables anodic aluminum oxide (AAO) membranes to be used as templates in a variety of nanotechnology applications without the need for expensive lithographical techniques. This review article is an overview of the current state of research on AAO membranes and the various applications of nanotechnology that use them in the manufacture of nano-materials and devices or incorporate them into specific applications such as biological/chemical sensors, nano-electronic devices, filter membranes and medical scaffolds for tissue engineering.

show abstract

Section: Applications Of Aao Layers and Membranesmentioning

confidence: 99%

Progress in Nano-Engineered Anodic Aluminum Oxide Membrane Development

2011

View full text Add to dashboard Cite

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

“…Additional studies have shown the use of nanoparticle forms of MoS 2 and other materials for property modification in general and with specific application to the functional modification of AAO [ 3 , 16 , 17 ]. Researchers have inserted MoS 2 into AAO pores via direct electrophoretic deposition [ 18 ] and used electrochemically induced insertion for soluble MoS x species that are subsequently converted to MoS 2 by thermal or plasma-induced decomposition in an O 2 -free atmosphere [ 19 , 20 , 21 , 22 ]. A better understanding of how materials insert into AAO nanopores and the resulting material distribution will help the rational design of future AAO-based functional materials.…”

Section: Introductionmentioning

confidence: 99%

Correlation of Fabrication Methods and Enhanced Wear Performance in Nanoporous Anodic Aluminum Oxide with Incorporated Molybdenum Disulfide (MoS2) Nanomaterials

Hatfield,

Brown,

Dervishi

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

Wear performance is integral to component longevity, minimizing industrial waste and excess energy costs in a wide variety of applications. Anodized aluminum oxide (AAO) has many beneficial properties leading to its wide use across industries as a surface treatment for many aluminum components, but the wear properties of the coating could be improved significantly. Here, we used an electrochemical method to incorporate molybdenum disulfide (MoS2), a nanomaterial used as a dry lubricant, to modify alloys of aluminum during AAO preparation. Using Raman spectroscopy and tribological scratch measurements, we thoroughly characterized the structure and wear behavior of the films. The MoS2 deposition procedure was optimal on aluminum 5052 anodized in higher acid concentrations, with friction coefficients at around 0.05 (~10× better than unmodified AAO). Changing anodization conditions to produce harder films with smaller pores led to worsened wear properties, likely because of lower MoS2 content. Studying a commercial MoS2/AAO film of a different Al alloy (7075) showed that a heat treatment step intended to fully convert all deposited MoSx species to MoS2 can adversely affect wear in some alloys. While Al 6061 and 1100 produced films with worse wear performance compared to Al 5052 or 7075, our results show evidence that acid cleaning after initial anodization likely removes residual alloying elements, affecting MoS2 incorporation. This study demonstrates a nanomaterial modified AAO film with superior wear characteristics to unmodified AAO and relates fabrication procedure, film structure, and practical performance.

show abstract

The pore-enlargement and self-lubrication treatment of anodic oxide film of aluminum

Cited by 23 publications

References 8 publications

Progress in Nano-Engineered Anodic Aluminum Oxide Membrane Development

Progress in Nano-Engineered Anodic Aluminum Oxide Membrane Development

Dry Sliding Tribological Properties of a Hard Anodized AA6082 Aluminum Alloy

Correlation of Fabrication Methods and Enhanced Wear Performance in Nanoporous Anodic Aluminum Oxide with Incorporated Molybdenum Disulfide (MoS2) Nanomaterials

Contact Info

Product

Resources

About