Preparation and characterization of Pd-Cu alloy composite membranes

Hui Yuan Gao, Yong Dan Li, Jerry Lin

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Thin Pd-Cu/ZrO2-PSS composite membranes were prepared by modified electroless plating technique on 0.2 μm graded 316L porous stainless steel (PSS) disks. After the surface of PSS was modified by Pd-doped zirconia, the zirconia side of the modified support was successively coated with palladium and copper by electroless plating. Finally, the as-deposited Pd-Cu/ZrO2-PSS composite membrane was annealed in hydrogen at 773 K for 5-10 h in order to form a homogeneous palladium-copper alloy film by thermal diffusion. XPS analyses showed the average surface composition of the two membranes were respectively Pd90Cu10 and Pd59Cu41 (mass fraction/%). XRD analyses indicated that deposited Pd90Cu10 alloy film contained only fcc (face-centred cubic) phase structure whereas Pd59Cu41 alloy film contained a mixture of fcc and bcc (body-centred cubic phase). Surface micrographs made by SEM showed the presence of some visible pin-holes on the 5 μm thick Pd-Cu/ ZrO2-PSS membrane, and pinhole free surface for the 10 μm one which should possess an excellent perm-selectivity for hydrogen.

Original languageEnglish (US)
Pages (from-to)41-45
Number of pages5
JournalCailiao Gongcheng/Journal of Materials Engineering
Issue number2
StatePublished - Feb 1 2006

Keywords

  • Electroless plating
  • Pd-Cu alloy composite membrane
  • Permeation hydrogen
  • Porous stainless steel

ASJC Scopus subject areas

  • Aerospace Engineering

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