Influence of particle content and porosity on the wear behaviour of cast in situ Al(Mn)–Al2O3(MnO2) composite

Hamid, Abdulhaqq A.; Ghosh, P. K.; Jain, S. C.; Ray, S.

doi:10.1016/j.wear.2005.02.120

Cited by 42 publications

(17 citation statements)

References 19 publications

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“…However, when the W-CNT content is up to 2.0 wt.%-3.0 wt.%, the friction coefficient begins to increase with increasing the W-CNT content, which can possibly be attributed to the high porosity of W-CNTs/Cu composites, as shown in Table 1. As reported in previous literatures [10][11], inhomogeneous microstructure with a large number of pores could result in the high friction coefficient of the composites. In addition, it can be seem in Fig.…”

Section: Tem Characterization Of Interfaces In the Compositesmentioning

confidence: 62%

Friction and wear properties of copper matrix composites reinforced by tungsten-coated carbon nanotubes

et al. 2011

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Carbon nanotubes (CNTs) were coated by tungsten layer using metal organic chemical vapor deposition process with tungsten hexacarbonyl as a precursor. The W-coated CNTs (W-CNTs) were dispersed into Cu powders by magnetic stirring process and then the mixed powders were consolidated by spark plasma sintering to fabricate W-CNTs/Cu composites. The CNTs/Cu composites were fabricated using the similar processes. The friction coefficient and mass wear loss of W-CNTs/Cu and CNTs/Cu composites were studied. The results showed that the W-CNT content, interfacial bonding situation, and applied load could influence the friction coefficient and wear loss of W-CNTs/Cu composites. When the W-CNT content was 1.0 wt.%, the W-CNTs/Cu composites got the minimum friction coefficient and wear loss, which were decreased by 72.1% and 47.6%, respectively, compared with pure Cu specimen. The friction coefficient and wear loss of W-CNTs/Cu composites were lower than those of CNTs/Cu composites, which was due to that the interfacial bonding at (W-CNTs)-Cu interface was better than that at CNTs-Cu interface. The friction coefficient of composites did not vary obviously with increasing applied load, while the wear loss of composites increased significantly with the increase of applied load.

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Section: Tem Characterization Of Interfaces In the Compositesmentioning

confidence: 62%

Friction and wear properties of copper matrix composites reinforced by tungsten-coated carbon nanotubes

et al. 2011

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“…In fact, the voids are caused by the gas dissolved in the molten metal which does not have enough time to escape before the molten metal solidification. The voids have a significant impact on the material's elastic modulus, anti-wear properties, and other mechanical properties [17].…”

Section: Detailed Investigation Of Bv Effectmentioning

confidence: 99%

Modeling and experimental study on breakdown voltage (BV) in low speed wire electrical discharge machining (LS-WEDM) of Ti-6Al-4V

Gong

Yao

Cheng

et al. 2016

Int J Adv Manuf Technol

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In this study, the breakdown voltage behavior in low speed wire electrical discharge machining (LS-WEDM) of Ti-6Al-4V (TC4) in the deionized water is investigated. Firstly, the electric field distortion caused by impurity particles including TC4 or brass metal and bubbles is investigated. And then the breakdown voltage model of TC4 machined by LS-WEDM is established and the experimental verification result indicates that the model predicting results conforms to the actual processing and could be well follow experimental results. Second, the influence of breakdown voltage on surface roughness and kerf width has been revealed, it can be found that the kerf width decreases, and the surface roughness increases as breakdown voltage increased. Besides, the voids become bigger and the surface cracks become deeper and wider with the breakdown voltage increased based on analysis of experiment results but for microcracks distributed on spherical or irregular attachments are not influenced by breakdown voltage due to their randomness. Meanwhile, the transparent bubbles of diameter of 400 nm can be observed near the droplet on the machined surface and its major composing element is oxygen. Finally, internal voids can be found in the joint of deterioration layer and the substrate which will make the combination of deterioration layer and the substrate not strong and easy to fall off.

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“…Firstly, the relatively finer size of the intermetallic layer MnAl 6 which results from nucleation provided by numerous alumina particles generated by the reduction of relatively fine MnO 2 particles. Second reason is the reinforcement of the matrix alloy by the formation of in-situ Al 2 O 3 within the metal matrix [34,35]. Figure 2 shows the OCP decay of the galvanic anodes incorporated with different concentrations of MnO 2 , in 3% NaCl solution as a function of time.…”

Section: Bio-growthmentioning

confidence: 99%

“…It is also extensively used as an efficient catalyst and as a pseudo capacitor due to its good electrochemical performance, environmental acceptability and low cost [30][31][32][33]. It has been reported that the incorporation of MnO 2 into an aluminum matrix significantly improves both hardness and wear resistance [34,35]. Though some investigations have been made to improve the mechanical and micro/macro structural characteristics of aluminum alloy by MnO 2 incorporation [15,34], no one has dealt with activation of Al-Zn alloy sacrificial anodes.…”

Section: Introductionmentioning

confidence: 99%

Development of MnO2-incorporated high performance aluminum alloy matrix sacrificial anodes

Shibli

Binoj

2008

J Appl Electrochem

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Manganese dioxide, a potential catalyst in many electrochemical reactions, was explored as an effective activator in Al ? 5% Zn alloy sacrificial anodes. The catalytic influence of MnO 2 on the anodes was microstructurally and electrochemically characterized using different electrochemical techniques. The process of incorporation of MnO 2 not only improved the grain size but also the galvanic performance of the anodes significantly. A galvanic performance as high as 80% was achieved by incorporating an optimum quantity (0.5%) of MnO 2 in the anode matrix. High and steady active open circuit potential, very low polarization and substantial reduction in self corrosion were achieved during galvanic exposure tests. Effective activation of the anodes by MnO 2 was also revealed by the results of electrochemical impedance analysis. The tolerance to biofouling on the anode surface was studied by quantifying the number of micro-organisms on the anode surface after immersing in natural sea water containing the micro-organisms.

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Influence of particle content and porosity on the wear behaviour of cast in situ Al(Mn)–Al2O3(MnO2) composite

Cited by 42 publications

References 19 publications

Friction and wear properties of copper matrix composites reinforced by tungsten-coated carbon nanotubes

Friction and wear properties of copper matrix composites reinforced by tungsten-coated carbon nanotubes

Modeling and experimental study on breakdown voltage (BV) in low speed wire electrical discharge machining (LS-WEDM) of Ti-6Al-4V

Development of MnO2-incorporated high performance aluminum alloy matrix sacrificial anodes

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