Development of laminar type functionally graded SiAlON ceramics

N. Çaliş*, A. Kara, F. Kara, H. Mandal

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)

Abstract

In order to combine high hardness with high toughness, laminar type (two layers) functionally graded (FGM) SiAlON ceramics were developed. In a previous study achieved by the same authors, presence of a sharp transition zone between the two layers was demostrated by SEM analyses. The aim of this study is to eliminate this sharp zone. In addition, the effect of sintering time and temperature on the interaction between the layers was also investigated. For this purpose same metal oxides were added to both layers, which have different compositions. Phase characterisation, microstructural investigation and hardness measurements showed that elimination of the sharp zone was achieved and the laminates sintered at 1700°C for 1 hour was found to be good enough to obtain continuous change in composition, microstructure and hardness through the thickness of the sample.

Original languageEnglish
Pages (from-to)1095-1098
Number of pages4
JournalKey Engineering Materials
Volume264-268
Issue numberII
Publication statusPublished - 2004
Externally publishedYes
EventProceedings of the 8th Conference and Exhibition of the European Ceramic Society - Istanbul, Turkey
Duration: 29 Jun 20033 Jul 2003

Keywords

  • FGMs
  • Hardness
  • Laminar FGMs
  • Microstructure
  • SiAlONs

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