Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Joining Foil-typed Pd-Cu Membranes to Collect CO2 Gas

이산화탄소 포집용 극박형 Pd-Cu 멤브레인 접합

  • Rhewy, Gyung-Woo (Laboratory for Interface and Joined materials Systems (LIJS), Division of Materials Science and Engineering, Yonsei University) ;
  • Wee, So-Young (Laboratory for Interface and Joined materials Systems (LIJS), Division of Materials Science and Engineering, Yonsei University) ;
  • Kim, Gyeom (Laboratory for Interface and Joined materials Systems (LIJS), Division of Materials Science and Engineering, Yonsei University) ;
  • Lee, Chang-Ha (Separation and Purification Laboratory, Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Baik, Il-Hyun (Greenhouse Gas Research Center, Korea Institute of Energy Research) ;
  • Park, Jin-Woo (Laboratory for Interface and Joined materials Systems (LIJS), Division of Materials Science and Engineering, Yonsei University)
  • 유경우 (연세대학교 신소재공학부 계면 및 접합 시스템 연구실) ;
  • 위소영 (연세대학교 신소재공학부 계면 및 접합 시스템 연구실) ;
  • 김겸 (연세대학교 신소재공학부 계면 및 접합 시스템 연구실) ;
  • 이창하 (연세대학교 화공생명공학과 분리 정제 연구실) ;
  • 백일현 (한국에너지기술연구원 온실가스연구단) ;
  • 박진우 (연세대학교 신소재공학부 계면 및 접합 시스템 연구실)
  • Received : 2010.05.14
  • Published : 2010.12.25
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Abstract

We present a new joining method for Pd-Cu membrane foils used as permeation tubes to collect $CO_2$. Since foils have poor mechanical strength, joining should be done at low temperatures to reduce residual stresses and without joining pressure. This contradicts the well known conditions for good contact between base materials that determines joint qualities. We selected Sn-Ag-Cu alloys that are highly reactive with Pd and Cu as a filler metal. As the filler melts at joining temperatures as low as $220{\sim}280^{\circ}C$, Pd and Cu are dissolved into the melt and react with the filler elements, which raises the melting temperature of the filler based on eutectic structures among the elements. Then, isothermal solidification progresses for the rest of the joining time. Intermetallic compounds (IMC) in the joints, one of the main factors for brittle joints, are inevitably formed. However, by optimizing both joining time and temperature, we balanced the wettability with IMC. Sealing test results confirmed that the joints are mechanically reliable during operation.

Keywords

Acknowledgement

Supported by : 지식경제부

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