Microstructure and Electrode Discharge Machining of TiN/Si3N4 Composites

Abstract:

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Conductive TiN/Si3N4 ceramic composites were processed by electrical discharge machining (EDM) and their microstructure and conductivity investigated. A low electrical resistivity of 1.25×10-3Ω.cm was obtained in 40vol%TiN/Si3N4 composite. The whole process of tool electrode wear is evaluated by sinker-EDM. The machined surfaces of TiN/Si3N4 ceramic composites were examined by scanning electron microscopy (SEM) and profilometry to determine the surface finish. Micropores of 700µm in depth and 70µm in diameter were successfully machined in TiN/ Si3N4 composites by the micro-EDM method.

Info:

Periodical:

Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie

Pages:

1337-1340

DOI:

10.4028/www.scientific.net/MSF.475-479.1337

Citation:

C. C. Liu and J. L. Huang, "Microstructure and Electrode Discharge Machining of TiN/Si3N4 Composites", Materials Science Forum, Vols. 475-479, pp. 1337-1340, 2005

Online since:

January 2005

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$35.00

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