Journal
APPLIED SURFACE SCIENCE
Volume 324, Issue -, Pages 554-562Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2014.10.151
Keywords
Aluminium; TiO2; Anodising; Friction stir processing; TEM; White
Categories
Funding
- Danish National Advanced Technology Foundation
- Interuniversity Attraction Poles Program from the Belgian State through the Belgian Policy agency [IAP7/21]
- Univ Lille1 [BQR-3b]
Ask authors/readers for more resources
Multiple-pass friction stir processing (FSP) was employed to impregnate TiO2 (rutile) particles into the surface of an aluminium alloy. The surface composites of Al-TiO2 were then anodised in a sulphuric acid electrolyte. The effect of anodising parameters on the resulting optical appearance was investigated. Microstructural and morphological characterization was performed using scanning (SEM) and transmission electron microscopy (TEM), and X-ray diffraction (XRD). The surface appearance was analysed using an integrating sphere-spectrophotometer setup which measures the diffuse and total reflectance of light from the surface. Compared to samples without TiO2, surface appearance after anodising of samples with TiO2 changed from dark to greyish white upon increasing the anodising voltage. This is attributed to the localized microstructural and morphological differences around the TiO2 powder particles incorporated into the anodic alumina matrix. The TiO2 powder particles in the FSP zone were partially or completely amorphized during the anodising process, and also electrochemically shadowed the anodising of underlying Al matrix. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available