Joining foil-typed Pd-Cu membranes to collect CO2 gas

Gyung Woo Rhewy, So Young Wee, Gyeom Kim, Chang Ha Lee, Il Hyun Baik, Jin Woo Park

Research output: Contribution to journalArticle

Abstract

We present a new joining method for Pd-Cu membrane foils used as permeation tubes to collect CO2. 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 220-2801), 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.

Original languageEnglish
Pages (from-to)1056-1063
Number of pages8
JournalJournal of Korean Institute of Metals and Materials
Volume48
Issue number12
DOIs
Publication statusPublished - 2010 Dec 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Modelling and Simulation
  • Surfaces, Coatings and Films
  • Metals and Alloys

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