• Title/Summary/Keyword: 세라믹 접합

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A Study on Thermal Stress Analysis of Alumina Ceramics to Copper Brazement by Finite Element Method (알루미나 세라믹과 구리의 브레이징 접합물에 대한 열응력의 유한요소법 해석에 관한 연구)

  • 전창훈;양영수;나석주
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.14 no.3
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    • pp.547-553
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    • 1990

  • With alumina ceramics to copper brazement of cylindrical shape, the thermal stress analysis was carried out by finite element method. Elastic and plastic behaviour was considered to copper, but only elastic behaviour was considered to alumina. Also material properties of alumina and copper were considered in not constant values but variable functions dependent on temperature. The result of analysis is shown that maximum tensile longitudinal stress is occurred at perimeter of alumina side interface and maximum compressive radial and tangential stresses are occurred at center of alumina side interface. Because of bending effect, tensile raidial and tangential stresses are occurred at near bottom of alumina, far from interface.

  • https://doi.org/10.22634/KSME.1990.14.3.547 인용 PDF

Dry Compaction of Nanosize TiO$_2$Powders (산화 티타늄 나노분말의 건식가압성형)

  • 이해원;임건자;전형우;박종구;이종호
    • Journal of the Korean Ceramic Society
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    • v.37 no.12
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    • pp.1146-1149
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    • 2000

  • 표면윤활층 처리와 540 MPa 까지의 진공가압성형을 통하여 나노 TiO$_2$과립 분말의 가압성형공정에서 나타나는 접합압력을 확인하였으며, 접합압력 상하에서 제조된 시편의 소결특성을 $700^{\circ}C$ 등온 소결을 통하여 분석하였다. 접합압력 이상에서 가압성형한 성형체를 $700^{\circ}C$에서 48시간 소결하여 96%의 높은 소결밀도와 112 nm의 평균 결정립 크기를 얻었다.

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