한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제42권6호
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  • Pages.443-447
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  • 2005
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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Fracture Behavior of Alumina-Titania-Monazite Composites

  • Paek, Yeong-Kyeun (Department of Materials Science and Engineering, Andong National University) ;
  • Chung, Tai-Soo (Department of Materials Science and Engineering, Andong National University)
  • 발행 : 2005.06.01
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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.

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참고문헌

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