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Micro Electro Discharge Machining of CNT-Based Nanocomposite Materials

[+] Author Affiliations
Yi Wan, Dae-Wook Kim, Jae-Soon Jang

Washington State University at Vancouver, Vancouver, WA

Young-Bin Park

Florida A&M University, Tallahassee, FL

Paper No. IMECE2007-41961, pp. 409-413; 5 pages
doi:10.1115/IMECE2007-41961
From:
  • ASME 2007 International Mechanical Engineering Congress and Exposition
  • Volume 3: Design and Manufacturing
  • Seattle, Washington, USA, November 11–15, 2007
  • Conference Sponsors: ASME
  • ISBN: 0-7918-4297-5 | eISBN: 0-7918-3812-9
  • Copyright © 2007 by ASME

abstract

Since the discovery of carbon nanotubes (CNTs), there has been great interest in CNT-based composites. Well-developed micromachining processes are necessary to realize micron-size CNT-based composite products. Micro electro discharge machining (micro-EDM) has been applied into many challenge-to-cut materials such as ceramic composites. In this study, micro-EDM is used to machine CNT-reinforced polymer composites in the micro scale. CNT-based polymer composites were fabricated using solution casting, in which CNTs were dispersed in the polymer-solvent solution via high energy sonication, followed by precipitation and hot pressing. The investigation uses design of experiments (DOE) approach to screen of influential input factors for process measures. A 2 level fractional factorial design was used with four input factors; CNT loading on the workpiece, μ-EDM supply voltage, pulse on-time duration, and pulse on-time ratio. With 16 μ-EDM experiments, supply voltage was found to be most influential to the material-removal-rate (MRR). Scanning electron microscope (SEM) was used to investigate characteristics of the machined CNT-based nanocomposite surfaces.

Copyright © 2007 by ASME

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