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Nano-scratching in solution to the single-crystal Ta (100) subjected to anodic oxidation
| Title: | Nano-scratching in solution to the single-crystal Ta (100) subjected to anodic oxidation |
| Authors: | Seo, Masahiro Browse this author | | Kawamata, Daisuke Browse this author |
| Issue Date: | 7-Aug-2006 |
| Publisher: | IOP Publishing Ltd. |
| Journal Title: | Journal of Physics D Applied Physics |
| Volume: | 39 |
| Issue: | 15 |
| Start Page: | 3150 |
| End Page: | 3156 |
| Publisher DOI: | 10.1088/0022-3727/39/15/S04 |
| Abstract: | A single crystal-tantalum (100) surface was anodically oxidized at 5.0 V (SHE) for 1 h in pH 8.4 borate buffer solution. Nano-scratching in solution at a constant normal force of 300 µN was performed on the tantalum (100) surface kept at 5.0 V (SHE) after anodic oxidation. Nano-scratching in air was also performed on the tantalum (100) surface after anodic oxidation. A stick–slip was always observed in lateral force versus lateral displacement curves during nano-scratching in solution. The degree of stick–slip, however, decreased with increasing scratching rate. The average friction coefficient obtained with nano-scratching in solution was significantly larger than that obtained with nano-scratching in air and increased linearly with the logarithm of time required for scratching. In contrast, the friction coefficient obtained with nano-scratching in air was independent of the time required for scratching. The protrusion at the scratching end of the groove produced by nano-scratching in solution was observed from the AFM image, while no protrusion was observed for nano-scratching in air. It has been proposed that the protrusion consists of anodic oxide accumulated on the moving front of the indenter tip during nano-scratching in solution and contributes to the increase in lateral force, i.e. friction coefficient. |
| Rights: | Copyright © 2006 IOP Publishing Ltd. |
| Relation: | http://www.iop.org/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/14655 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 瀬尾 眞浩
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