The role of percolation threshold for the control of the hardness and thermal stability of super- and ultrahard nanocomposites

A. Niederhofer, T. Bolom, P. Nesladek, K. Moto, C. Eggs, D. S. Patil, S. Veprek

Research output: Contribution to journalArticlepeer-review

130 Citations (Scopus)

Abstract

It is shown that enhancement of the hardness in superhard nanocomposites is due to the percolative nature of phase segregation, which results in approximately 1-ML coverage of the transition metal nanocrystals with the non-polar Si3N4. The formation of a nanostructure that is stable against coarsening up to relatively high temperatures is a consequence of the thermodynamically driven segregation of the immiscible phases.

Original languageEnglish
Pages (from-to)183-188
Number of pages6
JournalSurface and Coatings Technology
Volume146-147
DOIs
Publication statusPublished - Sep 2001

Keywords

  • Hardness
  • Nanocomposite
  • Percolation threshold

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