Comparison of two processes for manufacturing ceramic matrix composites from organometallic precursors

Maurice F. Gonon, Stuart Hampshire

Research output: Contribution to journalArticlepeer-review

Abstract

A commercial polysilazane is used as a silicon carbonitride matrix precursor for the manufacture of ceramic matrix composites using bi-directional SiC Nicalon fabrics as reinforcing material. The objective is to develop a simple and fast process leading to materials able to compete with SiC/C/SiC composites obtained by the Chemical Vapour Infiltration (CVI) route. Two processes are investigated: (1) a 'conventional' process using the densification of a SiC fibre preform by several cycles of impregnation of the preform with the polymer followed by pyrolysis and (2) a 'modified' process consisting in a powder filling of the fibre preform prior to the precursor impregnation and pyrolysis. This paper describes the different steps of both processes. The materials obtained are characterized in terms of their porosity, microstructure and mechanical properties.

Original languageEnglish
Pages (from-to)285-291
Number of pages7
JournalJournal of the European Ceramic Society
Volume19
Issue number3
DOIs
Publication statusPublished - Mar 1999

Keywords

  • Composites
  • Fibres
  • Mechanical properties
  • Microstructure-Final
  • Organic
  • Precursor
  • SiC

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