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Fracture Behavior of Alumina-Titania-Monazite Composites

Paek, Yeong-Kyeun   (Department of Materials Science and Engineering, Andong National UniversityUU0000902  ); Chung, Tai-Soo   (Department of Materials Science and Engineering, Andong National UniversityUU0000902  );
  • 초록

    Fracture behavior was investigated in the $Al_2O_3-TiO_2(3 wt{\%})-LaPO_4(25 wt{\%}$ ) composite ceramics. To improve the fracture toughness of alumina ceramics, $TiO_2$ and $LaPO_4$ as a second phase were introduced. The samples were made by conventional powder processing method. Green compacts were sintered at $1600^{\circ}C$ for 2 h in air. Fracture toughness was tested using Indentation Strength Bending(ISB) method. From the bending test, enhanced fracture toughness was found in the composite, compared to the pure and $TiO_2$ -doped alumina. The main factor of the enhancement of fracture toughness seems to be attributed to the weak interphase role of the $LaPO_4$ as a particulate type.


  • 주제어

    Toughness .   Fracture behavior .   Alumina .   Monazite.  

  • 참고문헌 (14)

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