Fabrication and characterization of carbon nanotube reinforced magnesium matrix composites

MİNDİVAN H., Efe A., KOŞATEPE A., Kayali E.

Applied Surface Science, cilt.318, ss.234-243, 2014 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Özet
  • Cilt numarası: 318
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1016/j.apsusc.2014.04.127
  • Dergi Adı: Applied Surface Science
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.234-243
  • Anahtar Kelimeler: CNTs, Composite, Corrosion, Hot extrusion, Magnesium chips, Mechanical properties
  • Bilecik Şeyh Edebali Üniversitesi Adresli: Evet

Özet

© 2014 Elsevier B.V. All rights reserved.In the present investigation, Mg chips are recycled to produce Mg-6 wt.% Al reinforced with 0.5, 1, 2 and 4 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 (0.5 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.