Mechanical and fractographic analyses of monolithic Si 3N 4ceramics during impact testing

Maria Berkes Maros, Nikoletta Kaulics Helmeczi, Péter Arató, Csaba Balázsi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A comprehensive experimental and theoretical work aiming at studying the dynamic failure process of silicon nitride ceramics has been recently started. The main goal of this research programme consists in characterizing the mechanical behaviour of the material under dynamic loading as well as investigating the dynamic failure process using micro- and macro-fractography. The current paper deals with the phenomenon of special rate dependence of K Id dynamic fracture toughness of Si 3N 4 based ceramics. The K Id values have been determined during instrumented impact test on the one hand based on the dynamic key curve method using notched specimens, on the other hand based on fractographic analyses of fracture surface of impacted unnotched samples.

Original languageEnglish
Pages (from-to)338-341
Number of pages4
JournalKey Engineering Materials
Volume409
DOIs
Publication statusPublished - Aug 18 2009

Keywords

  • Dynamic fracture toughness
  • Engineering ceramics
  • Fractography
  • Instrumented impact test
  • Loading rate dependence
  • Silicon nitride

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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