Structural and microstructural analysis of bifunctional TiO2/Al-Zr thin film deposited by hybrid process - Archive ouverte HAL Access content directly
Journal Articles Thin Solid Films Year : 2020

Structural and microstructural analysis of bifunctional TiO2/Al-Zr thin film deposited by hybrid process

(1) , (2) , (1) , (3) , (1) , (2) , (1)
1
2
3

Abstract

An Al-Zr (4 at.% Zr) film is deposited on High Speed Steel substrates by pulsed Direct Current magnetron sputtering in order to provide sacrificial corrosion resistance of steel. A TiO2 layer is synthesized on the top by aerosol-assisted metal-organic chemical Vapour Deposition (AA-MOCVD) in order to insure anti-biofouling behaviour. TiO2 coating has a typical CVD microstructure and the film is anatase single phased. The as-deposited Al-Zr film is an extended supersaturated solid solution Al(Zr) of Zr in Al. The AA-MOCVD process is performed at 773 K for 40 min. This annealing leads to a fine precipitation of highly coherent metastable Al3Zr(L12) phase in the Al(Zr) matrix. Larger precipitates with a needle like morphology, which crystallize in the equilibrium tetragonal Al3Zr(D023) phase are also observed. Transmission electron microscopy analysis clearly shows the cube on cube orientation between Al3Zr(L12) phase and Al(Zr) matrix. As the cubic Al3Zr(L12) metastable phase is beneficial for the mechanical properties of bulk aluminium based alloys, this result opens the investigation field on Al-Zr coatings, which can provide sacrificial protection of steels.
Fichier principal
Vignette du fichier
S0040609020304648.pdf (1.86 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-02927624 , version 1 (22-08-2022)

Licence

Attribution - NonCommercial - CC BY 4.0

Identifiers

Cite

Caroline Villardi de Oliveira, Sylvie Migot, Akram Alhussein, Carmen Jiménez, Frédéric Schuster, et al.. Structural and microstructural analysis of bifunctional TiO2/Al-Zr thin film deposited by hybrid process. Thin Solid Films, 2020, 709, pp.138255. ⟨10.1016/j.tsf.2020.138255⟩. ⟨hal-02927624⟩
55 View
8 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More