Fabrication of short carbon fibre reinforced SiC multilayer composites by tape casting

W. S. Yang, L. Fuso, S. Biamino, D. Vasquez, C. Vega Bolivar, P. Fino, C. Badini

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Silicon carbide multilayer composites containing short carbon fibres (C sf/SiC) were prepared by tape casting and pressureless sintering. C fibres were dispersed in solvents and then mixed with SiC slurry to make green C sf/SiC tape. Triton X-100 was found to be the best one for Toho Tenax HTC124 fibres (with water soluble coating) among BYK-163, BYK-410, BYK-2150, BYK-9076, BYK-9077 and Triton X-100 dispersants. C sf/SiC multilayer composites containing 5 vol.% fibre (mean fibre length of 3, 4.5, and 6 mm) were obtained. Addition of short C fibres seems to worsen the densification process in the C sf/SiC multilayer composites, whereas anisotropy shrinkage in C sf/SiC was also observed. Open pores size was increased slightly after the addition of C fibre but it decreased with the mean fibre length. Mechanical properties were affected by high residual porosity. The addition of short C fibre has not changed the crack deflection at weak interfaces. C sf/SiC multilayer composites containing longer fibres (4.5 and 6 mm) presented higher elastic modulus, bending strength and Vickers hardness as compared to shorter fibres (3 mm). Improved sintering performance and fibre content are necessary to improve mechanical properties.

Original languageEnglish
Pages (from-to)1011-1018
Number of pages8
JournalCeramics International
Volume38
Issue number2
DOIs
StatePublished - Mar 2012
Externally publishedYes

Keywords

  • A. Tape casting
  • C. Mechanical properties
  • Composite
  • Multilayer
  • Short fibre

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