The milling time effect on sintering kinetics of silicon nitride based composites

Orsolya Koszor, C. Balázsi

Research output: Contribution to journalArticle

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-Si 3N4 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.

Original languageEnglish
Pages (from-to)369-372
Number of pages4
JournalKey Engineering Materials
Volume409
DOIs
Publication statusPublished - 2009

Fingerprint

Silicon nitride
Sintering
Mechanical properties
Kinetics
Composite materials
Phase transitions
Carbon Nanotubes
Carbon nanotubes
Nanocomposites
Nitrogen
X rays
silicon nitride

Keywords

  • Carbon nanotubes
  • Ceramics
  • Mechanical Properties
  • Nanocomposites
  • Sintering

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

The milling time effect on sintering kinetics of silicon nitride based composites. / Koszor, Orsolya; Balázsi, C.

In: Key Engineering Materials, Vol. 409, 2009, p. 369-372.

Research output: Contribution to journalArticle

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