Mechanical and thermal properties of hot-pressed Si3N4 with added AlN

R. J. Sung, S. W. Lee, T. Nakayama, T. Kusunose, T. Sekino, K. Niihara

Research output: Contribution to journalConference article

Abstract

As hot pressing silicon nitride, sintering additives such as MgO, Al2O3 and Y2O3 are generally used. The use of sintering additives changes the physical properties of hot pressed silicon nitride markedly. In the present paper, silicon nitride was hot pressed with various amount of AlN as a sintering additive. Also mechanical properties such as density, hardness, Young's modulus, fracture toughness, flexual strength and thermal conductivity of hot pressed silicon nitrides were measured with regards to the content of AlN. Also microstructure such as grain-boundary phase was observed using a TEM. The effect of α/β phase fraction on the mechanical and thermal properties of silicon nitride was investigated as a function of the amount of AlN additive.

Original languageEnglish
Pages (from-to)119-124
Number of pages6
JournalMaterials Science Forum
Volume439
Publication statusPublished - 2003 Jan 1
Externally publishedYes
EventEco - Materials Processing and Design - Gyungpodae, Korea, Republic of
Duration: 2003 Feb 42003 Feb 6

Keywords

  • AlN
  • Hot pressing
  • SiN
  • Thermal conductivity

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Sung, R. J., Lee, S. W., Nakayama, T., Kusunose, T., Sekino, T., & Niihara, K. (2003). Mechanical and thermal properties of hot-pressed Si3N4 with added AlN. Materials Science Forum, 439, 119-124.