We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
The Mechanical Behavior of Nanoporous Gold Thin Films.
- Authors
Ye Sun; Jia Ye; Zhiwei Shan; Minor, Andrew M.; Balk, T. John
- Abstract
Thin films of nanoporous noble metals exhibit and interconnected, porous structure with ligament widths and pores on the order of 10 nm or higher. In this study, thin film stress measurements and in-situ nanoindentation in a transmission-electron microscope were performed to investigate the effects of nanoscale geometric confinement on the mechanical properties of metals and on dislocation-mediated plasticity. Although some films exhibit macroscopic cracking, the deformation of individual ligaments is completely ductile and clearly involves dislocation activity, even in 10 nm wide ligaments. The stresses generated in these films during thermal cycling correspond to bulk stresses that approach the theoretical strength of the metal. Film stress exhibits a dependence on film thickness, even though the ligament width is much smaller and would presumably govern deformation.
- Subjects
MECHANICAL properties of thin films; STRAINS &; stresses (Mechanics); POROSITY; MATERIAL plasticity; DEFORMATIONS (Mechanics)
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2007, Vol 59, Issue 9, p54
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-007-0118-0