Achieving homogeneous anodic TiO2 nanotube layers through grain refinement of the titanium substrate
Achieving homogeneous anodic TiO2 nanotube layers through grain refinement of the titanium substrate
In this work we used two-step electrochemical anodization to produce self-assembled layers of titanium dioxide nanotubes (TNT) on commercially pure titanium substrates with various grain sizes between 140 nm to 35 µm. The refined grain sizes were obtained using high pressure torsion (HPT). Optical microscopy, transmission electron microscopy, scanning electron microscopy and wettability testing showed that the homogeneity, morphology, thickness and wettability of TNT layers are critically dependent on the substrate grain size. With HPT processing up to ten turns, significant grain refinement was achieved with increasing dislocation density, leading to gradually thicker TNT layers up to 2 µm and improved homogeneity with decreasing standard deviation from 10 to 5 nm. HPT processing also changed the dissolution rate of oxide during anodization, which resulted in a different top morphology as well as an increased aqueous contact angle of TNT layers.
anodic titania nanotubes, anodization, high pressure torsion, ultra-fine-grained titanium
346-353
Hu, Nan
a9626677-cea5-48c7-9a7f-d3bc4116b9d5
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Ying, Chen
05e06c97-cf4a-49c9-b1fa-7e4a205b8d1d
Starink, Marco
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
15 November 2016
Hu, Nan
a9626677-cea5-48c7-9a7f-d3bc4116b9d5
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Ying, Chen
05e06c97-cf4a-49c9-b1fa-7e4a205b8d1d
Starink, Marco
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Hu, Nan, Gao, Nong, Ying, Chen and Starink, Marco
(2016)
Achieving homogeneous anodic TiO2 nanotube layers through grain refinement of the titanium substrate.
Materials & Design, 110, .
(doi:10.1016/j.matdes.2016.07.144).
Abstract
In this work we used two-step electrochemical anodization to produce self-assembled layers of titanium dioxide nanotubes (TNT) on commercially pure titanium substrates with various grain sizes between 140 nm to 35 µm. The refined grain sizes were obtained using high pressure torsion (HPT). Optical microscopy, transmission electron microscopy, scanning electron microscopy and wettability testing showed that the homogeneity, morphology, thickness and wettability of TNT layers are critically dependent on the substrate grain size. With HPT processing up to ten turns, significant grain refinement was achieved with increasing dislocation density, leading to gradually thicker TNT layers up to 2 µm and improved homogeneity with decreasing standard deviation from 10 to 5 nm. HPT processing also changed the dissolution rate of oxide during anodization, which resulted in a different top morphology as well as an increased aqueous contact angle of TNT layers.
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Accepted/In Press date: 29 July 2016
e-pub ahead of print date: 2 August 2016
Published date: 15 November 2016
Keywords:
anodic titania nanotubes, anodization, high pressure torsion, ultra-fine-grained titanium
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 399184
URI: http://eprints.soton.ac.uk/id/eprint/399184
ISSN: 0261-3069
PURE UUID: d3567718-e559-497f-8a6f-59b2078bd7e2
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Date deposited: 10 Aug 2016 09:21
Last modified: 15 Mar 2024 05:47
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Author:
Nan Hu
Author:
Chen Ying
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