Dry Sliding Tribological Properties of a Hard Anodized AA6082 Aluminum Alloy

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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Effect of Mg2Si Concentration on the Dry Sliding Wear Behavior of Al–Mg2Si Composite

Journal of Tribology ◽

10.1115/1.4043779 ◽

2019 ◽

Vol 141 (8) ◽

Cited By ~ 6

Author(s):

Prosanta Biswas ◽

Manas Kumar Mondal ◽

Durbadal Mandal

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Wear Resistance ◽

Optical Microscopy ◽

Sliding Wear ◽

Wear Behavior ◽

Dry Sliding Wear ◽

Dry Sliding ◽

Primary Mg2si ◽

Scanning Electron

The microstructural morphology and wear behavior of as-cast Al–X wt% Mg2Si (X = 0.0, 5.0, 10.0, 15.0, and 20.0) composites were investigated through optical microscopy (OM), energy dispersive X-ray (EDX) spectrometry, scanning electron microscopy (SEM), and field emission scanning electron microscopy (FESEM). The dry sliding wear behavior was studied against an EN 31 hardened steel disk at four different applied loads (19.6 N, 29.4 N, 39.2 N, and 49 N) with a sliding speed of 62.8 m/min for 1 h. The optical microscopy analysis exhibits that the primary Mg2Si particles average equivalent diameter and volume fraction are increased with an increase in Mg2Si (Mg and Si) concentration in the Al–Mg2Si composite. Therefore, the bulk hardness of the composites is increased, whereas the primary Mg2Si hardness decreased because the coarser primary Mg2Si particles have less compactness. The wear resistance of the commercially pure aluminum significantly improved due to Mg2Si reinforcement, and the wear resistance is increased with the increase in Mg2Si concentration up to 15.0 wt% and then decreased at 20.0 wt%. The tested composites worn surfaces and debris exhibit adhesion, delamination, microcutting-abrasion, abrasive- and oxidation-type wear mechanism.

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Delamination Behavior of Cu-Low-k Stack Under Different Slurries

MRS Proceedings ◽

10.1557/proc-767-f7.3 ◽

2003 ◽

Vol 767 ◽

Author(s):

A. K. Sikder ◽

S. Thagella ◽

P. B. Zantye ◽

Ashok Kumar

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Chemical Mechanical Polishing ◽

Wear Behavior ◽

Polished Surface ◽

Cu Metallization ◽

Wide Range ◽

Low K ◽

Delamination Behavior ◽

Scanning Electron

AbstractLower mechanical strength, reduced cohesive strength and lack of compatibility with other interconnect materials, are the major challenges involved in chemical mechanical polishing (CMP) of Cu metallization with ultra low-k materials as interlayer dielectrics. In this study we have investigated the polishing behavior of patterned Cu samples with underneath different low-k materials using two different slurries and a wide range of machine parameters. CMP micro tribometer was used to polish the samples with different rotations of platen (50 to 250 RPM) and down forces (1-6 PSI). Friction co-efficient and wear behavior were also investigated at different conditions. Optical and scanning electron microscopy was used to investigate the polished surface. It was observed that the two different Cu slurries used for polishing have marked effects on the polishing of Cu-low-k stack with respect to wear and delamination.

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Abrasive Wear Mechanisms in Steels

Journal of Lubrication Technology ◽

10.1115/1.3253171 ◽

1982 ◽

Vol 104 (1) ◽

pp. 9-16 ◽

Cited By ~ 56

Author(s):

M. J. Murray ◽

P. J. Mutton ◽

J. D. Watson

Keyword(s):

Electron Microscopy ◽

Heat Treatment ◽

Scanning Electron Microscopy ◽

Abrasive Wear ◽

Wear Mechanisms ◽

Wear Behavior ◽

Single Point ◽

Pure Metals ◽

Wear Tests ◽

Scanning Electron

Abrasive wear tests have been carried out on three steels and a number of pure metals using a pin-on-drum instrument. Each steel was tested at several different hardness levels attained by varying the heat treatment and while the results show a relationship between abrasion resistance and hardness, this was not the linear relationship found by Kruschov and others. Single point scratch experiments and scanning electron microscopy were carried out in an attempt to elucidate the wear mechanisms in these different materials and from the results a model is suggested to account for the observed wear behavior.

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Utilizing Scanning Electron Microscopy Stereoscopy to Explain the Wear Behavior of Latch Needles

Textile Research Journal ◽

10.1177/0040517509104470 ◽

2009 ◽

Vol 80 (1) ◽

pp. 25-34

Author(s):

Dilek Çukul ◽

Cevza Candan ◽

Servet Turan

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Wear Behavior ◽

Scanning Electron

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Effect of Sliding Speed on Tribological Properties of Microwave Sintered Copper-Graphite Composites

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.592-594.1305 ◽

2014 ◽

Vol 592-594 ◽

pp. 1305-1309 ◽

Cited By ~ 2

Author(s):

K. Rajkumar ◽

S. Aravindan

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Dry Sliding ◽

Graphite Layer ◽

Sliding Speed ◽

Graphite Content ◽

Sintered Copper ◽

Pin On Disc ◽

Graphite Composites ◽

Scanning Electron

Effects of graphite content, and sliding speed on the tribological characteristics of copper-graphite composites under dry sliding condition were evaluated using a pin-on-disc tribometer. The worn surfaces of the composites were analyzed through Scanning Electron Microscopy (SEM). The experimental results revealed the improvement in wear resistance with increasing graphite content. The friction coefficient is also gradually decreasing upto 25 vol% graphite. Sliding speed has an effect on copper (5-15 vol%) graphite composites where as sliding speed has no effect in copper-(20-30 vol%) graphite composites. This difference is attributed to availability of self-lubricating graphite layer at the contact zone.

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Dry Sliding Wear Behavior of Cu-Graphite Composite within a Wide Range of Sliding Velocity

Advanced Tribology ◽

10.1007/978-3-642-03653-8_126 ◽

2009 ◽

pp. 404-405

Author(s):

Wenlin Mai ◽

Jinjun Lu

Keyword(s):

Sliding Wear ◽

Wear Behavior ◽

Dry Sliding Wear ◽

Dry Sliding ◽

Sliding Velocity ◽

Graphite Composite ◽

Wide Range

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Formation and Characterization of the Quasicrystal Films

Materials Science Forum ◽

10.4028/www.scientific.net/msf.546-549.1699 ◽

2007 ◽

Vol 546-549 ◽

pp. 1699-1702

Author(s):

Xi Ying Zhou ◽

Liang He ◽

Yan Hui Liu

Keyword(s):

Electron Microscopy ◽

Thin Films ◽

Scanning Electron Microscopy ◽

Electric Current ◽

Wear Behavior ◽

Micro Hardness ◽

X Ray Diffraction ◽

X Ray ◽

Scanning Electron

Al-Cu-Fe quasicrystals powder was used to prepare the thin films on the surface of the A3 steel by the means of DMD-450 vacuum evaporation equipment. The thin films with different characterization were obtained through different parameters. The microstructures of the thin films were analyzed by Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD). Additionally, the nano-hardness and the modulus of the films are tested by MTS and Neophot micro-hardness meter. The results showed that the modulus of the films was about 160GPa. Nano hardness of the films was about 7.5 Gpa. The films consisted of CuAl2, AlCu3. The thickness and the micro-hardness of the films are improved. In same way, with the increase of the electric current, the thickness and the hardness of the films are also improved. Along with increase of the time and the electric current, the wear behavior of the films was improved. To some extent, the microstructure of films contained the quasicrystal phase of Al65Cu20Fe15.

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Dry Sliding Wear Behavior of Cast A7075 and A7075/SAF 2205 Composite Material

High Temperature Materials and Processes ◽

10.1515/htmp-2015-0004 ◽

2016 ◽

Vol 35 (5) ◽

pp. 487-492

Author(s):

Ahmet Karaaslan ◽

Alptekin Kısasöz ◽

Ş. Hakan Atapek ◽

Kerem Altuğ Güler

Keyword(s):

Weight Loss ◽

Composite Material ◽

Friction Coefficient ◽

Wear Rate ◽

Wear Behavior ◽

Dry Sliding Wear ◽

Dry Sliding ◽

Cast Material ◽

Saf 2205 ◽

Wear Tests

AbstractThe wear behavior of cast A7075 and A7075/SAF 2205 composite material fabricated by vacuum-assisted investment flask casting was investigated under dry sliding condition. The wear tests were carried out using a “ball-on-disc” type tribometer. In the wear tests, 100Cr6 and ZrO2 balls were used as counterparts and the load, total distance and rotating speed were selected as 10 N, 100 m and 100 rpm, respectively. The results were evaluated using the friction coefficient–distance diagram, weight loss and wear rate. All worn surfaces were examined by scanning electron microscope and wear characteristics of the materials were discussed as a function of the microstructural features. It was concluded that composite material had lower friction coefficient, less weight loss and slower wear rate than that of cast material.

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Synthesis of Fe2O3/CNTs for the Fast Removal of Tetracycline from Aqueous Solutions

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.915-916.933 ◽

2014 ◽

Vol 915-916 ◽

pp. 933-941 ◽

Cited By ~ 3

Author(s):

Zhong Jie Zhang ◽

Chang Yu Lu ◽

Wei Huang ◽

Wei Sheng Guan ◽

Yue Xin Peng

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Magnetic Measurements ◽

Ferrite Nanoparticles ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

Wide Range ◽

Fast Removal ◽

Scanning Electron

The effective remove to tetracycline still remains a big challenge for scientists. In this work, we used a new method for preparing functional magnetic CNTS with ferrite nanoparticles. A wide range of techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and magnetic measurements were applied to characterize the obtained Fe2O3/CNTs. Moreover, we have also studied the properties of adsorbent to tetracycline. In addition, we have found that the Fe2O3/CNTs are better reusable adsorbent than other traditional adsorbents by magnetic separation recycling method.

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