Paper Title:
The Milling Time Effect on Sintering Kinetics of Silicon Nitride Based Composites
  Abstract

We have investigated the influence of the milling time on the structure and mechanical properties of the nanocomposite, as well as the effect of grain size on the sintering kinetics (α to β silicon nitride phase transformation). As we observed, by increasing the milling time the mechanical properties of the ceramics may be improved. The reason of this improvement is partly due to the α-Si3N4 to β-Si3N4 transformation facilitated by the smaller grain size, on the other hand it is due to the better dispersion of the carbon nanotubes. The X-ray measurements confirmed that in the case of samples milled for 5 hours, even when sintered at 1700°C, low nitrogen pressure (2MPa) and without holding time, a faster phase transformation occurs, resulting in improved mechanical properties.

  Info
Periodical
Edited by
J. Dusza, R. Danzer, R. Morrell and G.D. Quinn
Pages
369-372
DOI
10.4028/www.scientific.net/KEM.409.369
Citation
O. Koszor, C. Balázsi, "The Milling Time Effect on Sintering Kinetics of Silicon Nitride Based Composites", Key Engineering Materials, Vol. 409, pp. 369-372, 2009
Online since
March 2009
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