Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5349768 | Applied Surface Science | 2014 | 10 Pages |
Abstract
In the present investigation, Mg chips are recycled to produce Mg-6Â wt.% Al reinforced with 0.5, 1, 2 and 4Â wt.% nanosized CNTs by mechanical ball milling, cold pressing and subsequently hot extrusion process without sintering step. The microstructure, mechanical properties and corrosion behavior of Mg/Al without CNT (base alloy) and composites were evaluated. The distribution of CNTs was analyzed using a Scanning Electron Microscopy (SEM) equipped with Energy Dispersive Spectroscopy (EDS) analyzer and a Wavelength Dispersive X-Ray Fluorescence spectrometer (WDXRF). Microstructural analysis revealed that the CNTs on the Mg chips were present throughout the extrusion direction and the uniform distribution of CNTs at the chip surface decreased with increase in the CNT content. The results of the mechanical and corrosion test showed that small addition of CNTs (0.5Â wt.%) evidently improved the hardness and corrosion resistance of the composite by comparing with the base alloy, while increase in the CNT weight fraction in the initial mixture resulted in a significant decrease of hardness, compression strength, wear rate and corrosion resistance.
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Authors
Harun Mindivan, Arife Efe, A. Hadi Kosatepe, E.Sabri Kayali,