한국분말재료학회지 (Journal of Powder Materials)

  • 제19권4호
  • /
  • Pages.253-258
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  • 2012
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
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MgO와 ZrO2가 첨가된 Al2TiO5 세라믹의 열·기계적 물성

Thermo-Mechanical Properties of Al2TiO5 Ceramics Stabilized with MgO and ZrO2 Additives

  • 김다미 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 김형태 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 김형준 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 김익진 (한서대학교 신소재공학과) ;
  • 최성철 (한양대학교 신소재공학부) ;
  • 김용찬 (포항산업과학연구원) ;
  • 남궁정 (포항산업과학연구원) ;
  • 류성수 (한국세라믹기술원 엔지니어링세라믹센터)
  • Kim, Da-Mi (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Hyung-Tae (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Hyeong-Jun (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Ik-Jin (Department of Materials Science and Engineering, Hanseo University) ;
  • Choi, Seong-Cheol (Division of Material Science and Engineering, Hanyang University) ;
  • Kim, Yong-Chan (New Material Research Center, Research Institute of Industrial Science & Technology) ;
  • NamKung, Jung (New Material Research Center, Research Institute of Industrial Science & Technology) ;
  • Ryu, Sung-Soo (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology)
  • 투고 : 2012.06.01
  • 심사 : 2012.07.11
  • 발행 : 2012.08.28
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초록

The characteristics of $Al_2TiO_5$ ceramics were influenced by the additives and the heat treatment that controls the microcrack behavior at grain boundaries. The effect of additives on $Al_2TiO_5$ ceramics were investigated in terms of mechanical properties and thermal expansion at high temperature. The $Al_2TiO_5$ were synthesized at $1500^{\circ}C$, $1550^{\circ}C$ and $1600^{\circ}C$ for 2h by reaction sintering. The formation of $Al_2TiO_5$ phase was increased by additives that enhanced the volume of the microcrack that can lead to low thermal expansion. The mechanical properties of the stabilized $Al_2TiO_5$ ceramics were increased remarkably at $1100^{\circ}C$, $1200^{\circ}C$ and $1300^{\circ}C$ due to the oneset of mechanical healing of grain-bondary microcracks at a high temperature. The amount of microcrack was decreased at lower sintering temperature that causes the increase of mechanical properties at high temperature.

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