Influence of graphite additives on wear properties of hot pressed Si 3N4 ceramics

Pavol Šajgalik, Miroslav Hnatko, Peter Čopan, Zoltán Lenčéš, Jow Lay Huang

Research output: Contribution to journalArticle

8 Citations (Scopus)


Two different groups of Si3N4 based composites were prepared within the present study. The first group consisting of materials containing SiC nanoinclusions in Si3N4 matrix, the second one with the same SiC/Si3N4 composition containing different size of graphite particles. Wet volume abrasive wear of these two groups of materials was studied. Wear mechanisms of the first group is mainly transgranular fracture. The dominant wear mechanism of second group is changed with the increased load from transgranular to the intergranular. Significant role plays the weak graphite/matrix interface. The pull-out of SiC/Si 3N4 grain agglomerates from this area deteriorates a possible lubrication effect of graphite during the test. No significant benefit of the application of graphite particles in respect to the wear behavior was observed in the present study.

Original languageEnglish
Pages (from-to)1061-1068
Number of pages8
JournalJournal of the Ceramic Society of Japan
Issue number1335
Publication statusPublished - 2006 Nov

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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