Fabrication of silicon carbide whiskers and whisker-containing composite coatings without using a metallic catalyst

Hyung Suk Ahn, Doo Jin Choi

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Silicon carbide has been focused on by many researchers because of its outstanding mechanical and chemical properties. Silicon carbide whiskers are important for the reinforcement of ceramic matrix composites. However, metallic catalysts, which are necessary for the growth of whiskers, can cause degradation of their properties. Thus, we have made silicon carbide whiskers without using the metallic catalyst. Whiskers were obtained with an input gas ratio of above 20, and their diameter decreased as the input gas ratio increased. As the input gas ratio [H2(+N2)/MTS] increases, a transition from whisker growth to film growth occurred at a higher pressure. We also deposited whisker-containing coatings based on the above conditions by alternating the whisker growth and the matrix filling process. The coatings showed pebble-like structures, and their morphologies differed according to the growth condition of the whiskers in the coating layer.

Original languageEnglish
Pages (from-to)276-281
Number of pages6
JournalSurface and Coatings Technology
Volume154
Issue number2-3
DOIs
Publication statusPublished - 2002 May 15

All Science Journal Classification (ASJC) codes

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

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