한국분말재료학회지 (Journal of Powder Materials)

  • 제27권6호
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  • Pages.498-502
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  • 2020
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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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CAS glass와 Yb2O3를 이용한 2차상의 형상 제어가 AlN 세라믹의 열전도도 및 기계적 특성에 미치는 영향

Effect of Morphological Control of Secondary Phase using Yb2O3 and Ca-Al-Si-O-based Glass on Thermal and Mechanical Properties of AlN

  • 최동규 (한국세라믹기술원 세라믹테스트베드센터) ;
  • 김시연 (한국세라믹기술원 세라믹테스트베드센터) ;
  • 여동훈 (한국세라믹기술원 세라믹테스트베드센터) ;
  • 신효순 (한국세라믹기술원 세라믹테스트베드센터) ;
  • 정대용 (인하대학교 신소재공학부)
  • Choi, Dong Kyu (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Shi Yeon (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Yeo, Dong Hun (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Shin, Hyo Soon (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Jeong, Dae Yong (Department of Materials Science and Engineering, Inha university)
  • 투고 : 2020.10.19
  • 심사 : 2020.11.25
  • 발행 : 2020.12.28
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초록

We investigate the effects of Yb2O3 and calcium aluminosilicate (CAS) glass as sintering additives on the sintering behavior of AlN. The AlN specimens are sintered at temperatures between 1700℃ and 1900℃ for 2 h in a nitrogen atmosphere. When the Yb2O3 content is low (within 3 wt.%), an isolated shape of secondary phase is observed at the AlN grain boundary. In contrast, when 3 wt.% Yb2O3 and 1 wt.% CAS glass are added, a continuous secondary phase is formed at the AlN grain boundary. The thermal conductivity decreases when the CAS glass is added, but the sintering density does not decrease. In particular, when 10 wt.% Yb2O3 and 1 wt.% CAS glass are added to AlN, the flexural strength is the highest, at 463 MPa. These results are considered to be influenced by changes in the microstructure of the secondary phase of AlN.

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