0
Research Papers

The Effect of the Electrical Discharge Machining Process on the Material Properties of Nonconductive Ceramics

[+] Author and Article Information
Nirdesh Ojha

Laboratory for Process Technology,
IMTEK-Department of Microsystem Engineering,
University of Freiburg,
Georges-Koehler-Allee 103,
Freiburg 79110, Germany
e-mail: nirdesh.ojha@gmail.com

Florian Zeller

Laboratory for Process Technology,
IMTEK-Department of Microsystem Engineering,
University of Freiburg,
Georges-Koehler-Allee 103,
Freiburg 79110, Germany
e-mail: zeller@imtek.de

Claas Mueller

Laboratory for Process Technology,
IMTEK-Department of Microsystem Engineering,
University of Freiburg,
Georges-Koehler-Allee 103,
Freiburg 79110, Germany
e-mail: claas.mueller@imtek.uni-freiburg.de

Holger Reinecke

Laboratory for Process Technology,
IMTEK-Department of Microsystem Engineering,
University of Freiburg,
Georges-Koehler-Allee 103,
Freiburg 79110, Germany
e-mail: holger.reinecke@imtek.uni-freiburg.de

1Corresponding author.

Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MICRO- AND NANO-MANUFACTURING. Manuscript received July 20, 2015; final manuscript received November 19, 2015; published online January 5, 2016. Assoc. Editor: Don A. Lucca.

J. Micro Nano-Manuf 4(1), 011007 (Jan 05, 2016) (5 pages) Paper No: JMNM-15-1049; doi: 10.1115/1.4032155 History: Received July 20, 2015; Revised November 19, 2015

Electrical discharge machining (EDM) is widely used to manufacture complex shaped dies, molds and critical parts in conductive materials. With the help of an assisting electrode (AE), EDM process can be used to machine nonconductive ceramics. This paper evaluates the mechanical properties of three high-performance nonconductive ceramics (ZrO2, Si3N4, and SiC) that have been machined with the EDM process using AE. Mechanical properties such as Vickers hardness (HV 0.3), surface roughness (Sq), and flexural strength of the machined and the nonmachined samples are compared. The EDM process causes decrease in Vickers hardness, increase in surface roughness, and decrease in flexural strength.

FIGURES IN THIS ARTICLE
<>
Copyright © 2016 by ASME
Your Session has timed out. Please sign back in to continue.

References

Mohri, N. , Fukuzawa, Y. , Tani, T. , Saito, N. , and Furutani, K. , 1996, “ Assisting Electrode Method for Machining Insulating Ceramics,” CIRP Ann. Manuf. Technol., 45(1), pp. 201–204. [CrossRef]
Schubert, A. , Zeidler, H. , Wolf, N. , and Hackert, M. , 2011, “ Micro Electro Discharge Machining of Electrically Nonconductive Ceramics,” Physics, 1308, pp. 1303–1308.
Ojha, N. , Hösel, T. , Müller, C. , and Reinecke, H. , 2013, “ Characterization of the Conductive Layer Formed During μ-Electric Discharge Machining of Non-Conductive Ceramics,” Processing and Properties of Advanced Ceramics and Composites V (Ceramic Transactions Series), Vol. 240, N. P. Bansal and J. P. Singh , eds., John Wiley & Sons, Inc., Hoboken, NJ, pp. 105–110.
Ojha, N. , Hösel, T. , Zeller, F. , Müller, C. , and Reinecke, H. , 2013, “ Major Parameters Affecting the Electric Discharge Machining of Non-Conductive SiC,” Proceedings of the 10th International Conference on Multi-Material Micro Manufacture, S. Azcárate and S. Dimov , eds., Research Publishing, Vol. 7, pp. 978–981.
Ojha, N. , Hösel, T. , Müller, C. , and Reinecke, H. , 2014, “ Parametric Analysis of μ-Electric Discharge Machining of Non-Conductive Si3N4,” Appl. Mech. Mater., 564, pp. 560–565. [CrossRef]
Ojha, N. , Hösel, T. , Müller, C. , and Reinecke, H. , 2014, “ Comparative Study on Parametric Analysis of μEDM of Non-Conductive Ceramics,” Key Eng. Mater., 611–612, pp. 693–700. [CrossRef]
Lu, C. , Danzer, R. , and Frischer, F. , 2002, “ Fracture Statistics of Brittle Materials: Weibull or Normal Distribution,” Phys. Rev. E, 65(6), p. 067102. [CrossRef]
Roy, J. , Chandra, S. , Das, S. , and Maitra, S. , 2014, “ Oxidation Behaviour of Silicon Carbide-A Review,” Rev. Adv. Mater. Sci., 38, pp. 29–39.
Hösel, T. , Müller, C. , and Reinecke, H. , 2012, “ Analysis of Surface Reaction Mechanisms on Electrically Non-Conductive Zirconia, Occurring Within the Spark Erosion Process Chain,” Key Eng. Mater., 504, pp. 1171–1176. [CrossRef]
Lauwers, B. , Kruth, J. , Liu, W. , Eeraerts, W. , Schacht, B. , and Bleys, P. , 2004, “ Investigation of Material Removal Mechanisms in EDM of Composite Ceramic Materials,” J. Mater. Process. Technol., 149(1–3), pp. 347–352. [CrossRef]

Figures

Grahic Jump Location
Fig. 1

Principle of EDM machining of nonconductive ceramics for four-point bending test: (a) start, (b) during, and (c) after the EDM process

Grahic Jump Location
Fig. 2

ZrO2 samples for four point bending test: P) polished sample, A) sample with screen printed AE, I) sample after EDM, and M) sample after the thermal annealing

Grahic Jump Location
Fig. 3

Custom built four-point bending test setup to measure the flexural strength

Grahic Jump Location
Fig. 4

Vickers hardness of ceramics

Grahic Jump Location
Fig. 5

Surface roughness (Sq) of ceramics

Grahic Jump Location
Fig. 6

Weibull probability plot for (a) ZrO2, (b) Si3N4, and (c) SiC ceramics

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In