Synthesis of TiC and SiC/TiC nanocrystalline powders by gas-phase laser-induced reaction

R. Alexandrescu, E. Borsella, S. Botti, M.C. Cesile, S. Martelli, R. Giorgi, S. Turtù, G. Zappa

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Abstract

In the development of advanced ceramic nanocomposites, the production of titanium-based nanopowders has assumed importance, especially since recent results showed that mechanical properties of SiC matrices could be significantly improved by the incorporation of TiC second phase and vice versa. Nanosized TiC and TiC/SiC powders were synthesized by CO2laser-induced reactions. A TiCl4and hydrocarbons mixture was irradiated for titanium carbide production; the addition of SiH4gave rise to the composite powders. The results of the powder characterization, obtained mainly by X-ray photoelectron spectroscopy, X-ray-induced Auger Spectroscopy and X-ray diffraction, are discussed in detail to correlate the reaction parameters to the composition and morphology of the products. Both TiC and SiC/TiC nanopowders showed a high reactivity to the air exposure, as evinced by the surface oxidation of the particles. Nevertheless, a quite good yield was obtained for nanocomposites of β-SiC matrix with the addition of up to 20% TiC phase.
Original languageEnglish
Pages (from-to)5629 - 5635
Number of pages7
JournalJournal of Materials Science
Volume32
Issue number21
DOIs
Publication statusPublished - 1997
Externally publishedYes

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All Science Journal Classification (ASJC) codes

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

Cite this

Alexandrescu, R., Borsella, E., Botti, S., Cesile, M. C., Martelli, S., Giorgi, R., ... Zappa, G. (1997). Synthesis of TiC and SiC/TiC nanocrystalline powders by gas-phase laser-induced reaction. Journal of Materials Science, 32(21), 5629 - 5635. https://doi.org/10.1023/A:1018640911556