High-temperature deformation behavior of SiC-AlN ceramic alloys with fine-grained microstructure

Yoshimasa Kobayashi, Jing Feng Li, Akira Kawasaki, Ryuzo Watanabe

研究成果: Article査読

抄録

It was recently found that SiC-AlN solid solutions can be formed over a wide compositional range and better mechanical properties were obtained particularly at room temperature for the SiC-AlN alloys than the end number materials. The present study was intended to investigate the high-temperature strength and deformation behavior of the SiC-AlN solid solution. For this purpose, superfine grained SiC-AlN solid solution and its composite samples were prepared by a reaction HIP-sintering process, and their fracture strength and deformation behavior were evaluated up to 1773K by using a newly-developed Small Punch (SP) testing method. It has been found that high fracture strength is obtained up to 1473K, and below this temperature the load-deflection curve is linear, indicating typically brittle behavior. At 1773K, plastic-like deformation behavior was observed and it intensified with decreasing strain rate. The fractographic observation suggested that the grain boundary sliding enhanced by the ultrafine grained-microstructure was predominately responsible for the appearance of the non-linear deformation at high temperature.

本文言語English
ページ(範囲)421-425
ページ数5
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
43
4
DOI
出版ステータスPublished - 1996 4月

ASJC Scopus subject areas

  • 機械工学
  • 産業および生産工学
  • 金属および合金
  • 材料化学

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