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Shahzad K, Mardare CC, Mardare AI, Hassel AW. Mixed oxide growth on combinatorial aluminium–gadolinium alloys — a thermodynamic and first-principles approach. J Solid State Electrochem 2021. [DOI: 10.1007/s10008-021-05012-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AbstractMetal surfaces covered with oxides have attracted considerable scientific attention in various applications. In particular, anodic films fabricated by cost-effective anodizing have been widely used in nano-structured engineering to provide various surface functionalities. However, understanding of alloy film stability, having individual elements with widely varying structures and morphologies, is very limited due to lack of thermodynamic information and effects of electrolyte chemistry. This requires many tedious efforts on a trial and error basis in selecting suitable electrolytes that can produce the protective film at high efficiency on alloys having mixed chemistries. It is, therefore, crucial to develop a combination of high throughput theoretical analysis and automated rapid localized electrochemical probing that provides a fast and simple solution for electrolyte choice and paves the way to the remarkable expansion of industrial applications of oxides. Herein, we demonstrate that combinatorial Al–Gd alloys covering 1.0 to 10.0 at.% Gd can be oxidized into ultra-thin anodic films of controlled thickness through a selection of electrolyte based on thermodynamics (phosphate buffer with a pH of 8.20). We propose that growth of anodic films on alloys at high efficiency is possible if Gibbs free energy minimization criteria would be systematically contemplate.
Graphical abstract
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Shahzad K, Lone SA, Mardare CC, Mardare AI, Hassel AW. A theoretical and experimental framework for the formation of mixed anodic films on combinatorial aluminium-cerium alloys. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137173] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Recktenwald D, Mardare CC, Mardare AI, Jinga LI, Socol G, Hassel AW. Combinatorial screening of dysprosium-magnesium-zinc alloys for bioresorptive implants. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.137106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Shahzad K, Mardare CC, Mardare AI, Hassel AW. A Thermodynamic Approach for Selection of Anodizing Electrolytes in Aluminium‐Holmium System. ChemElectroChem 2020. [DOI: 10.1002/celc.201901634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Khurram Shahzad
- Institute for Chemical Technology of Inorganic Materials Johannes Kepler University Linz Altenberger Str. 69 4040 Linz Austria
| | - Cezarina Cela Mardare
- Institute for Chemical Technology of Inorganic Materials Johannes Kepler University Linz Altenberger Str. 69 4040 Linz Austria
- Christian Doppler Laboratory for Combinatorial Oxide Chemistry (COMBOX), Institute for Chemical Technology of Inorganic Materials Johannes Kepler University Linz Altenberger Str. 69 4040 Linz Austria
| | - Andrei Ionut Mardare
- Institute for Chemical Technology of Inorganic Materials Johannes Kepler University Linz Altenberger Str. 69 4040 Linz Austria
| | - Achim Walter Hassel
- Institute for Chemical Technology of Inorganic Materials Johannes Kepler University Linz Altenberger Str. 69 4040 Linz Austria
- Christian Doppler Laboratory for Combinatorial Oxide Chemistry (COMBOX), Institute for Chemical Technology of Inorganic Materials Johannes Kepler University Linz Altenberger Str. 69 4040 Linz Austria
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