Paper Title:
Electrically Conductive and Wear Resistant Si3N4-Based Composites with TiC0.5N0.5 Particles for Electrical Discharge Machining
  Abstract

Electrically conductive and wear resistant Si3N4-based composites were developed in order to facilitate electrical discharge machining (EDM). The microstructural and mechanical properties of Si3N4-based composites with different amounts of TiC0.5N0.5, fabricated by hot pressing at 1650°C for 1 hour, are investigated and evaluated. The hardness of the micron-sized TiC0.5N0.5 powder based composites increased with increasing TiC0.5N0.5 content from 20 up to 40 vol. %, whereas the bending strength decreased. The fracture toughness reached a maximum at 30 vol. % TiC0.5N0.5 and exhibits a strong anisotropy with respect to the hot-pressing direction. The EDM behaviour of the composites is strongly influenced by the TiC0.5N0.5 content. The composites with a higher TiC0.5N0.5 content have a lower material removal rate but a better surface quality.

  Info
Periodical
Materials Science Forum (Volumes 492-493)
Edited by
Omer Van der Biest, Michael Gasik, Jozef Vleugels
Pages
27-32
DOI
10.4028/www.scientific.net/MSF.492-493.27
Citation
D. Jiang, J. Vleugels, O. Van der Biest, W. D. Liu, R. Verheyen, B. Lauwers, "Electrically Conductive and Wear Resistant Si3N4-Based Composites with TiC0.5N0.5 Particles for Electrical Discharge Machining ", Materials Science Forum, Vols. 492-493, pp. 27-32, 2005
Online since
August 2005
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Price
$32.00
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