Journal of Materials Science

, Volume 32, Issue 18, pp 4973–4977 | Cite as

Mechanical properties and microstructure of reaction sintered β′-sialon ceramics prepared by a slip casting method

  • Seiji Hayama
  • Takakuni Nasu
  • Masakuni Ozawa
  • Suguru Suzuki


Reaction sintered β′-sialon ceramics Si6-zAlzOzN8-z, were prepared by slip casting from α-Si3N4, Al2O3, and AlN starting powders. The mechanical properties and microstructures of sintered bodies were investigated as a function of composition (varying the z value). The maximum value of the flexural strength, ∼ 600 MPa, and fracture toughness, ∼ 4.1 MPa m1/2 were observed in the z range of 0.5–1. In the z value range of 2–4, the mechanical properties decreased drastically. This phenomenon is attributed to the variation of fracture energy, which is greatly affected by the sintered crystallite size.


Fracture Toughness Crystallite Size Fracture Energy Sialon Fracture Face 


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Copyright information

© Chapman and Hall 1997

Authors and Affiliations

  • Seiji Hayama
    • 1
  • Takakuni Nasu
  • Masakuni Ozawa
  • Suguru Suzuki
  1. 1.deramic Research LaboratoryNagoya Institute of TechnologyTajimi GifuJapan

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