Journal of Mechanical Science and Technology

, Volume 32, Issue 7, pp 3351–3358 | Cite as

Micro electrical discharge drilling characteristics of conductive SiC–Ti2CN composite

  • Joon Yeong Gwon
  • Seung Hoon Jang
  • Won Tae Kwon
  • Young-Wook Kim


An electrically conductive SiC-Ti2CN composite was fabricated from β-SiC and TiN powders with 2 vol% equimolar Y2O3-Sc2O3 additives by conventional hot-pressing. The composite (electrical resistivity of nearly 10-4 Ω·cm) was wire electro discharge machined into a specimen having a thickness of 500 μm. Entrance clearance, machining time, number of shorts, material removal rate (MRR), counts, and the effects of the capacitance and voltage of conductive SiC-Ti2CN composite during micro electrical discharge drilling were measured and compared to those of SUS304. As the unit discharge energy increased, entrance clearance, machining time, and number of shorts decreased. A decrement in the number of shorts was the main reason for decrements in entrance clearance and machining time. MRR was proportional to unit discharge energy. The study to determine the location of shorts during electro discharge drilling was also conducted. It was founded that the short circuit occurred mainly at the beginning (0–1000 cts) because of low electrical density, and right before the exit (3000–5000 cts) owing to the difficulty of removing debris. Both the capacitance and voltage tended to be inversely proportional to the number of shorts.


SiC–Ti2CN composites Conductive ceramics Electrical resistivity Electrical discharge drilling Micro hole 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    C. F. Hu, Y. C. Zhou and Y. W. Bao, Material removal and surface damage in EDM of Ti3SiC2 ceramic, Ceram. Int., 34 (2008) 537–541.CrossRefGoogle Scholar
  2. [2]
    Y.-W. Kim, K. J. Kim, H. C. Kim, N.-H. Cho and K.-Y. Lim, Electrodischarge-machinable silicon carbide ceramics sintered with yttrium nitrate, J. Am. Ceram. Soc., 94 (2011) 991–993.CrossRefGoogle Scholar
  3. [3]
    H.-K. Yoo, J.-H. Ko, K.-Y. Lim, W. T. Kwon and Y.-W. Kim, Micro-electrical discharge machining characteristics of newly developed conductive SiC ceramic, Ceram. Int., 41 (2015) 3490–3496.CrossRefGoogle Scholar
  4. [4]
    A. Torres, C. J. Luis and I. Puertas, EDM machinability and surface roughness analysis of TiB2 using copper electrodes, J. Alloys, Comp., 690 (2017) 337–347.CrossRefGoogle Scholar
  5. [5]
    B. Lauwers, K. Brans, W. Liu and K. Vanmeensel, Influence of the type and grain size of the electrode-conductive phase on the Wire-EDM performance of ZrO2 ceramic composites, CIRP Ann. Manuf. Technol., 57 (2008) 191–194.CrossRefGoogle Scholar
  6. [6]
    B. Lauwers, J. P. Kruth, W. Liu, W. Eeraerts, B. Schacht and P. Bleys, Investigation of material removal mechanisms in EDM of composite ceramic materials, J. Mater. Process Tech., 149 (2004) 347–352.CrossRefGoogle Scholar
  7. [7]
    E. Ferraris, D. Reynaerts and B. Lauwers, Micro-EDMprocess investigation and comparison performance of Al2O3 and ZrO2 based ceramic composites, CIRP Ann. Manuf. Technol., 60 (2011) 235–238.CrossRefGoogle Scholar
  8. [8]
    P. Ninz, R. Landfired, F. Kern and R. Gadow, Electrical discharge machining of metal doped Y-TZP/TiC nanocomposites, J. Eur. Ceram. Soc., 35 (2015) 4031–4037.CrossRefGoogle Scholar
  9. [9]
    Selvarajan L., M. Manohar, A. Udhaya kumar and P. Dhinakaran, Modelling and experimental investigation of process parameters in EDM of Si3N4-TiN composites using GRA-RSM, J. Mech. Sci. Tech., 31 (1) (2017) 111–122.CrossRefGoogle Scholar
  10. [10]
    C. Diver, J. Atkinson, H. J. Helml and L. Li, Micro-EDM drilling of tapered holes for industrial applications, J. Mater. Proc. Technol., 149 (2004) 296–303.CrossRefGoogle Scholar

Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Joon Yeong Gwon
    • 1
  • Seung Hoon Jang
    • 2
  • Won Tae Kwon
    • 1
  • Young-Wook Kim
    • 2
  1. 1.Department of Mechanical and Information EngineeringThe University of SeoulSeoulKorea
  2. 2.Functional Ceramic Laboratory, Department of Material Science and EngineeringThe University of SeoulSeoulKorea

Personalised recommendations