Micro electro discharge machining of polymethylmethacrylate (PMMA)/Multi-Walled Carbon Nnotube (MWCNT) nanocomposites

Yi Wan, Dave Kim, Young Bin Park, Sung Kwan Joo

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


This study investigated micro electro discharge machining (micro-EDM) of Polymethylmethacrylate (PMMA)/ Multi-Walled Carbon Nanotube (MWCNT) nanocomposites. PMMA/MWCNT nanocomposites were fabricated using solution casting, in which MWCNTs were dispersed in the polymer-solvent solution via high energy sonication, followed by precipitation and hot pressing. MWCNT loading was varied to investigate the effect of electrical conductivity of nanocomppsites on the machinability. Micron-size holes were created to study the material removal mechanism in micro-EDM. The electro discharge phenomena may occur between electrically conductive MWCNT and the tungsten electrode during the process. As a result, PMMA/MWCNT nanocomposite samples with 10 to 35 wt% MWNTs were able to be EDMed with proper machining conditions. It was observed that the material removal rate increases with increasing micro-EDM supply voltage and MWCNT loading on the material system. Both optical microscope and scanning electron microscope (SEM) were used to investigate the characteristics of the machined holes and nanocomposite surfaces.

Original languageEnglish
Pages (from-to)115-123
Number of pages9
JournalAdvanced Composites Letters
Issue number4
Publication statusPublished - 2008


  • Hole quality
  • Material removal rate
  • Micro-EDM
  • Multi-walled carbon nanotube
  • Nanocomposites

ASJC Scopus subject areas

  • Ceramics and Composites
  • Industrial and Manufacturing Engineering


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