Nano-indentation of SIC and Si3N4/SiC ceramic materials

Miroslav Balog, Pavot Šajgalík, Zoltán Lenčéš, Miroslav Hnatko, Jozef Kečkéš, J. L. Huang, J. Janega, R. Horváthová

Research output: Contribution to journalArticle

Abstract

The present paper deals with the nano-indentation of SiC-micro and Si 3N4/SiC-micro/nano ceramic materials. The investigated SiC-micro and Si3N4SiC-micro/nano ceramics were prepared by liquid phase sintering. Liquid phase was formed from different sintering additives (Y2O3, Yb2O3, Sm 2O3). In the case of Si3N4SiC-micro/ nano ceramics the SiC nano-grains were created from SiNC amorphous powder. SiNC precursor decomposed to SiC and Si3N4 particles during sintering. The comparison of nano- and macro-hardness of investigated ceramic materials showed that nano-hardness is significantly higher. The indentation modulus correlated with the measured nano-hardness. Remarkable influence of grain boundaries and SiC nano-inclusions on hardness was observed.

Original languageEnglish
Pages (from-to)272-275
Number of pages4
JournalKey Engineering Materials
Volume290
DOIs
Publication statusPublished - 2005 Jan 1

All Science Journal Classification (ASJC) codes

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

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    Balog, M., Šajgalík, P., Lenčéš, Z., Hnatko, M., Kečkéš, J., Huang, J. L., Janega, J., & Horváthová, R. (2005). Nano-indentation of SIC and Si3N4/SiC ceramic materials. Key Engineering Materials, 290, 272-275. https://doi.org/10.4028/0-87849-973-3.272