Densification Mechanism of NITE-SiC and $SiC_f/SiC$ Composites

  • Yoon, Han-Ki (Division of Materials Engineering, Dong-Eui University) ;
  • Lee, Young-Ju (Department of Materials Engineering, Graduate School of Dong-Eui University) ;
  • Park, Yi-Hyun (Institute of Advanced Energy, Graduate School of Kyoto University) ;
  • Park, Jun-Soo (Institute of Advanced Energy, Kyoto University) ;
  • Kohyama, A. (Institute of Advanced Energy, Kyoto University)
  • Published : 2006.11.16

Abstract

Nano Infiltration Transient Eutectic Phase - Silicon Carbide (NITE-SiC) and $SiC_f/SiC$ composite have been fabricated by a Hot Pressing (HP) process, using SiC powder with an average size of about 30nm. Alumina ($Al_2O_3$) and Yttria ($Y_2O_3$) were used for additives materials. These mixed powders were sintered at the temperature a of $1300^{\circ}C$, $1650^{\circ}C$, $1800^{\circ}C$ and $1900^{\circ}C$ under an applied pressure of 20MPa. And unidirection and two dimension woven structures of $SiC_f/SiC$ composites were prepared starting from Tyranno SA fiber. Densification of microstructure gives an effect to density. Specially, Densification Mechanism basically is important from the sintering which use the HP. In this study, the densification of NITE-SiC and $SiC_f/SiC$ composite mechanism by a press displacement appears investigated. The mechanism on the densification of each sintering temperature was investigated. The each step is shows a with each other different mechanism quality.

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