한국해양공학회지 (Journal of Ocean Engineering and Technology)

  • 제21권6호
  • /
  • Pages.95-100
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  • 2007
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  • 1225-0767(pISSN)
  • /
  • 2287-6715(eISSN)
한국해양공학회 (Korean Society of Ocean Engineers)
권호 표지

$Y_3Al_5O_{12}$ 첨가가 질화규소 세라믹스의 제조 및 그 기계적 특성에 미치는 영향

The Effects of $Y_3Al_5O_{12}$ on the Mechanical Properties of Silicon Nitride

  • 노상훈 (부경대학교 신소재공학부 대학원) ;
  • 문창권 (부경대학교 신소재공학부) ;
  • 정해용 (부경대학교 신소재공학부) ;
  • 서원찬 (부경대학교 신소재공학부) ;
  • 윤한기 (동의대학교 기계공학과) ;
  • 김부안 (부경대학교 신소재공학부)
  • Noh, Sang-Hoon (Department of Materials Science and Engineering, Graduate School of Pukyong National University) ;
  • Moon, Chang-Kwon (Division of Materials Science and Engineering, Pukyong National University) ;
  • Jeong, Hae-Yong (Division of Materials Science and Engineering, Pukyong National University) ;
  • Seo, Won-Chan (Division of Materials Science and Engineering, Pukyong National University) ;
  • Yoon, Han-Ki (Department of Mechanical Engineering, Dong-Eui University) ;
  • Kim, Bu-Ahn (Division of Materials Science and Engineering, Pukyong National University)
  • 발행 : 2007.12.31
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초록

In the present work, silicon nitride was fabricated with $Y_3Al_5O_{12}$ as a sintering additive and its mechanical properties were investigated. Silicon nitride with 3, 5, and 7wt% of $Y_3Al_5O_{12}$ was prepared and sintered by a Hot Pressing (HP) technique at 1750 and $1800^{\circ}C$ for 2 h. The process was performed under different process pressures of 30 and 45 MPa. Mechanical properties (density, strength, hardness, and fracture toughness) were investigated as a function of the $Y_3Al_5O_{12}$ content in $Si_3N_4$. $Si_3N_4\;-Y_3Al_5O_{12}$ ceramics showing similar mechanical properties compared with $Si_3N_4-Y_2O_3-Al_2O_3$ ceramics. But its high temperature strength was considerably higher than that of $Si_3N_4-Y_2O_3-Al_2O_3$ ceramics.

키워드

참고문헌

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