Abstract
Co-sputtered AuPdAg alloy films on flat and curved substrates were investigated to determine the effects of substrate curvature on dealloying and microstructure of nanoporous (np) AuPd. Ligament morphology, film cracking and composition were significantly different for np-AuPd in concave vs. convex film regions. Convex substrate curvature led to extensive film cracking, wide and high aspect ratio ligaments, and low residual Ag content. This is attributed to a more tensile stress state that enhances the dissolution rate of Ag.
Original language | English |
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Pages (from-to) | 1125-1128 |
Number of pages | 4 |
Journal | Scripta Materialia |
Volume | 61 |
Issue number | 12 |
DOIs | |
State | Published - Dec 2009 |
Bibliographical note
Funding Information:This material is based upon work supported by the National Science Foundation under Grant No. DMR-0847693 . Acknowledgment is made to the Donors of the American Chemical Society Petroleum Research Fund (Grant No. 43324-G10 ), for support of this research. T.J.B. thanks the National Center for Electron Microscopy for the NCEM Visiting Scientist Fellowship that allowed some of the SEM work to be carried out.
Keywords
- AuPd
- Dealloying
- Nanoporous
- Substrate curvature
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys