Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1063/1.4803865
- Scopus: eid_2-s2.0-84878055538
- WOS: WOS:000319294100098
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Chemo-mechanical softening during in situ nanoindentation of anodic porous alumina with anodization processing
Title | Chemo-mechanical softening during in situ nanoindentation of anodic porous alumina with anodization processing |
---|---|
Authors | |
Issue Date | 2013 |
Publisher | American Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp |
Citation | Journal of Applied Physics, 2013, v. 113 n. 18, article no. 184903 How to Cite? |
Abstract | Simultaneous application of mechanical stresses on a material as it undergoes an electrochemical reaction can result in interesting coupling effects between the chemical and mechanical responses of the material. In this work, anodic porous alumina supported on Al is found to exhibit significant softening during in situ nanoindentation with anodization processing. Compared with ex situ nanoindentation without anodization processing, the in situ hardness measured on the alumina is found to be much lower, when the estimated maximum stress underneath the indenter is exerted on the metal/oxide (m/o) interface at the bottom of the oxide. Numerical calculation reveals that a high electric field exists across the nanometrically thin barrier layer where the electrochemical reactions mainly take place. In microindentation with a flat punch, in situ softening is also observed, but no significant difference in the deformation of the oxide and the Al substrate between in situ and ex situ cases can be observed from cross-sectional transmission electron microscopy examination. The evidence, therefore, indicates that the observed in situ softening is due to a combination of high compression stress and electric field acting near the m/o interface, and it is likely that such conditions enhance Al ionization at the m/o interface, thus causing the m/o interface to move faster into the Al substrate under the in situ condition. © 2013 AIP Publishing LLC. |
Persistent Identifier | http://hdl.handle.net/10722/183661 |
ISSN | 2023 Impact Factor: 2.7 2023 SCImago Journal Rankings: 0.649 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Cheng, C | - |
dc.contributor.author | Ngan, AHW | - |
dc.date.accessioned | 2013-06-14T02:39:01Z | - |
dc.date.available | 2013-06-14T02:39:01Z | - |
dc.date.issued | 2013 | - |
dc.identifier.citation | Journal of Applied Physics, 2013, v. 113 n. 18, article no. 184903 | - |
dc.identifier.issn | 0021-8979 | - |
dc.identifier.uri | http://hdl.handle.net/10722/183661 | - |
dc.description.abstract | Simultaneous application of mechanical stresses on a material as it undergoes an electrochemical reaction can result in interesting coupling effects between the chemical and mechanical responses of the material. In this work, anodic porous alumina supported on Al is found to exhibit significant softening during in situ nanoindentation with anodization processing. Compared with ex situ nanoindentation without anodization processing, the in situ hardness measured on the alumina is found to be much lower, when the estimated maximum stress underneath the indenter is exerted on the metal/oxide (m/o) interface at the bottom of the oxide. Numerical calculation reveals that a high electric field exists across the nanometrically thin barrier layer where the electrochemical reactions mainly take place. In microindentation with a flat punch, in situ softening is also observed, but no significant difference in the deformation of the oxide and the Al substrate between in situ and ex situ cases can be observed from cross-sectional transmission electron microscopy examination. The evidence, therefore, indicates that the observed in situ softening is due to a combination of high compression stress and electric field acting near the m/o interface, and it is likely that such conditions enhance Al ionization at the m/o interface, thus causing the m/o interface to move faster into the Al substrate under the in situ condition. © 2013 AIP Publishing LLC. | - |
dc.language | eng | - |
dc.publisher | American Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp | - |
dc.relation.ispartof | Journal of Applied Physics | - |
dc.rights | Copyright 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Applied Physics, 2013, v. 113 n. 18, article no. 184903 and may be found at https://doi.org/10.1063/1.4803865 | - |
dc.title | Chemo-mechanical softening during in situ nanoindentation of anodic porous alumina with anodization processing | en_US |
dc.type | Article | en_US |
dc.identifier.email | Ngan, AHW: hwngan@hkucc.hku.hk | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1063/1.4803865 | - |
dc.identifier.scopus | eid_2-s2.0-84878055538 | - |
dc.identifier.hkuros | 214456 | - |
dc.identifier.volume | 113 | - |
dc.identifier.issue | 18 | - |
dc.identifier.spage | article no. 184903 | - |
dc.identifier.epage | article no. 184903 | - |
dc.identifier.isi | WOS:000319294100098 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 0021-8979 | - |