Toughened and strengthened silicon carbide ceramics by adding graphene-based fillers

Manuel Belmonte*, Andrés Nistal, Pierre Boutbien, Benito Román-Manso, María I. Osendi, Pilar Miranzo

*Corresponding author for this work

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

Graphene nanoplatelets and reduced graphene oxide (rGO) were selected as fillers to develop reinforced silicon carbide (SiC)/graphene composites. The mechanical properties of the materials were investigated as a function of the type of graphene source and graphene content. Composites containing just 5 vol.% of rGOs exhibited an outstanding mechanical performance, increasing both the fracture toughness by ~ 162%, with a maximum value of 8.3 MPa · m1/2, and the strength by ~ 60% (600 MPa) when compared to monolithic SiC. The preferential alignment of the graphene fillers, their dimensions, and the graphene-SiC mechanical interlock are key factors to promote crack shielding mechanisms.

Original languageEnglish
Pages (from-to)127-130
Number of pages4
JournalScripta Materialia
Volume113
Early online date05 Nov 2015
DOIs
Publication statusPublished - 01 Mar 2016
Externally publishedYes

Keywords

  • Ceramic matrix composites (CMC)
  • Fracture
  • Graphene
  • Mechanical properties
  • Toughness

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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