On the formation of a periodic surface structure on Zr{sub 3}Al during anodic dissolution
- Univ. of Illinois, Urbana, IL (United States)
Anodic dissolution of Zr{sub 3}Al by electrochemical polishing was found to produce a periodic surface profile consisting of a sharply profiled peak and valley structure with a wavelength of the order of < 100 nm. This was investigated using transmission electron microscopy. Partial amorphization of the alloy was often found to accompany the production of the periodic surface profile. In situ TEM annealing of the specimens resulted in the disappearance of the surface profile and the formation of hydrides of zirconium. It is known that Zr-based alloys are susceptible to hydrogen absorption during electropolishing and that hydrogen absorption can induce a crystalline to amorphous phase transformation. The authors have examined the possible mechanisms by which hydrogen absorption can influence the development of topography during anodic dissolution, and have identified the formation of a biaxial state of stress as being of significance.
- DOE Contract Number:
- FG02-91ER45439
- OSTI ID:
- 201086
- Journal Information:
- Acta Materialia, Vol. 44, Issue 2; Other Information: PBD: Feb 1996
- Country of Publication:
- United States
- Language:
- English
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