Growth process of TiC clusters from Ti nanoparticles with evaporated carbon layer

A. Ikegami, Y. Kimura, H. Suzuki, T. Sato, T. Tanigaki, O. Kido, M. Kurumada, Y. Saito, C. Kaito

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Titanium carbide formation by the solid-solid reaction on the surface of Ti nanoparticles was studied in situ using a high-resolution transmission electron microscope with a heating stage. The cross-sectional image of the Ti surface was clearly observed. Vacuum-deposited carbon covered the whole the surface of Ti nanoparticles in spite of the partly evaporation on the nanoparticle surface. The diffusion of the carbon atoms inside the Ti nanoparticles depended on the size of the nanoparticles. When the Ti nanoparticle diameter was less than 30 nm, carbon atoms diffused into the Ti nanoparticle and formed TiC. The superstructure of the Ti nanoparticles was observed, which revealed the growth process of TiC to be the diffusion of carbon atoms. For Ti nanoparticles with diameter larger than 30 nm it was observed that diffusion of Ti atoms into the carbon layer was dominant, which resulted in formation of TiC in the carbon layer at the surface of Ti nanoparticles.

Original languageEnglish
Pages (from-to)395-400
Number of pages6
JournalSurface Science
Volume540
Issue number2-3
DOIs
Publication statusPublished - 2003 Aug 20

Keywords

  • Amorphous surfaces
  • Clusters
  • Crystalline-amorphous interfaces
  • Electron microscopy
  • Titanium carbide

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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