The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Gerard Santarini - One of the best experts on this subject based on the ideXlab platform.
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oxidation mechanism of a fe 9cr 1mo steel by liquid pb bi eutectic alloy part i
Corrosion Science, 2008Co-Authors: Laure Martinelli, F Balbaudcelerier, G Picard, Gerard SantariniAbstract:Abstract This paper is the first part of a global study on the oxidation process of a Fe–9Cr–1Mo martensitic steel (T91) in static liquid Pb–Bi. It focuses on the oxygen transport mode across the Oxide scale. The Oxide layer has a duplex structure composed of an internal Fe–Cr spinel layer and an external magnetite layer. Oxygen 18 tracer experiments are performed: they show that the magnetite layer grows at the Pb–Bi/ Oxide Interface whereas the Fe–Cr spinel layer grows at the metal/Oxide Interface. Oxygen seems to diffuse across the Oxide scale dissolved inside nanometric lead penetrations called nano-channels. Specific experiments are performed to characterize the nano-channels.
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oxidation mechanism of an fe 9cr 1mo steel by liquid pb bi eutectic alloy at 470 c part ii
Corrosion Science, 2008Co-Authors: Laure Martinelli, F Balbaudcelerier, G Picard, A Terlain, S Bosonnet, Gerard SantariniAbstract:Abstract This paper is the second part of a global study on the oxidation process of an Fe–9Cr–1Mo martensitic steel (T91) in static liquid Pb–Bi. It focuses on the growth mechanism of a duplex Oxide scale. The Oxide layer has a duplex structure composed of an internal Fe–Cr spinel layer and an external magnetite layer. The magnetite layer grows by iron diffusion until Pb–Bi/Oxide Interface whereas the Fe–Cr spinel layer grows, at the metal/Oxide Interface, inside the space kept “available” by the iron vacancies accumulation due to iron outwards diffusion for magnetite formation. This growth mechanism is close to the “available space model”. However, this model is completed by an auto-regulation process based on oxygen supply.
Laure Martinelli - One of the best experts on this subject based on the ideXlab platform.
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oxidation mechanism of a fe 9cr 1mo steel by liquid pb bi eutectic alloy part i
Corrosion Science, 2008Co-Authors: Laure Martinelli, F Balbaudcelerier, G Picard, Gerard SantariniAbstract:Abstract This paper is the first part of a global study on the oxidation process of a Fe–9Cr–1Mo martensitic steel (T91) in static liquid Pb–Bi. It focuses on the oxygen transport mode across the Oxide scale. The Oxide layer has a duplex structure composed of an internal Fe–Cr spinel layer and an external magnetite layer. Oxygen 18 tracer experiments are performed: they show that the magnetite layer grows at the Pb–Bi/ Oxide Interface whereas the Fe–Cr spinel layer grows at the metal/Oxide Interface. Oxygen seems to diffuse across the Oxide scale dissolved inside nanometric lead penetrations called nano-channels. Specific experiments are performed to characterize the nano-channels.
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oxidation mechanism of an fe 9cr 1mo steel by liquid pb bi eutectic alloy at 470 c part ii
Corrosion Science, 2008Co-Authors: Laure Martinelli, F Balbaudcelerier, G Picard, A Terlain, S Bosonnet, Gerard SantariniAbstract:Abstract This paper is the second part of a global study on the oxidation process of an Fe–9Cr–1Mo martensitic steel (T91) in static liquid Pb–Bi. It focuses on the growth mechanism of a duplex Oxide scale. The Oxide layer has a duplex structure composed of an internal Fe–Cr spinel layer and an external magnetite layer. The magnetite layer grows by iron diffusion until Pb–Bi/Oxide Interface whereas the Fe–Cr spinel layer grows, at the metal/Oxide Interface, inside the space kept “available” by the iron vacancies accumulation due to iron outwards diffusion for magnetite formation. This growth mechanism is close to the “available space model”. However, this model is completed by an auto-regulation process based on oxygen supply.
F Balbaudcelerier - One of the best experts on this subject based on the ideXlab platform.
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oxidation mechanism of a fe 9cr 1mo steel by liquid pb bi eutectic alloy part i
Corrosion Science, 2008Co-Authors: Laure Martinelli, F Balbaudcelerier, G Picard, Gerard SantariniAbstract:Abstract This paper is the first part of a global study on the oxidation process of a Fe–9Cr–1Mo martensitic steel (T91) in static liquid Pb–Bi. It focuses on the oxygen transport mode across the Oxide scale. The Oxide layer has a duplex structure composed of an internal Fe–Cr spinel layer and an external magnetite layer. Oxygen 18 tracer experiments are performed: they show that the magnetite layer grows at the Pb–Bi/ Oxide Interface whereas the Fe–Cr spinel layer grows at the metal/Oxide Interface. Oxygen seems to diffuse across the Oxide scale dissolved inside nanometric lead penetrations called nano-channels. Specific experiments are performed to characterize the nano-channels.
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oxidation mechanism of an fe 9cr 1mo steel by liquid pb bi eutectic alloy at 470 c part ii
Corrosion Science, 2008Co-Authors: Laure Martinelli, F Balbaudcelerier, G Picard, A Terlain, S Bosonnet, Gerard SantariniAbstract:Abstract This paper is the second part of a global study on the oxidation process of an Fe–9Cr–1Mo martensitic steel (T91) in static liquid Pb–Bi. It focuses on the growth mechanism of a duplex Oxide scale. The Oxide layer has a duplex structure composed of an internal Fe–Cr spinel layer and an external magnetite layer. The magnetite layer grows by iron diffusion until Pb–Bi/Oxide Interface whereas the Fe–Cr spinel layer grows, at the metal/Oxide Interface, inside the space kept “available” by the iron vacancies accumulation due to iron outwards diffusion for magnetite formation. This growth mechanism is close to the “available space model”. However, this model is completed by an auto-regulation process based on oxygen supply.
G Picard - One of the best experts on this subject based on the ideXlab platform.
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oxidation mechanism of a fe 9cr 1mo steel by liquid pb bi eutectic alloy part i
Corrosion Science, 2008Co-Authors: Laure Martinelli, F Balbaudcelerier, G Picard, Gerard SantariniAbstract:Abstract This paper is the first part of a global study on the oxidation process of a Fe–9Cr–1Mo martensitic steel (T91) in static liquid Pb–Bi. It focuses on the oxygen transport mode across the Oxide scale. The Oxide layer has a duplex structure composed of an internal Fe–Cr spinel layer and an external magnetite layer. Oxygen 18 tracer experiments are performed: they show that the magnetite layer grows at the Pb–Bi/ Oxide Interface whereas the Fe–Cr spinel layer grows at the metal/Oxide Interface. Oxygen seems to diffuse across the Oxide scale dissolved inside nanometric lead penetrations called nano-channels. Specific experiments are performed to characterize the nano-channels.
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oxidation mechanism of an fe 9cr 1mo steel by liquid pb bi eutectic alloy at 470 c part ii
Corrosion Science, 2008Co-Authors: Laure Martinelli, F Balbaudcelerier, G Picard, A Terlain, S Bosonnet, Gerard SantariniAbstract:Abstract This paper is the second part of a global study on the oxidation process of an Fe–9Cr–1Mo martensitic steel (T91) in static liquid Pb–Bi. It focuses on the growth mechanism of a duplex Oxide scale. The Oxide layer has a duplex structure composed of an internal Fe–Cr spinel layer and an external magnetite layer. The magnetite layer grows by iron diffusion until Pb–Bi/Oxide Interface whereas the Fe–Cr spinel layer grows, at the metal/Oxide Interface, inside the space kept “available” by the iron vacancies accumulation due to iron outwards diffusion for magnetite formation. This growth mechanism is close to the “available space model”. However, this model is completed by an auto-regulation process based on oxygen supply.
Siyoung Choi - One of the best experts on this subject based on the ideXlab platform.
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directional ionic transport across the Oxide Interface enables low temperature epitaxy of rutile tio2
Nature Communications, 2020Co-Authors: Yunkyu Park, Hyeji Sim, Giyeop Kim, Daseob Yoon, Hyeon Han, Younghak Kim, Kyung Mee Song, Donghwa Lee, Siyoung ChoiAbstract:Heterogeneous Interfaces exhibit the unique phenomena by the redistribution of charged species to equilibrate the chemical potentials. Despite recent studies on the electronic charge accumulation across chemically inert Interfaces, the systematic research to investigate massive reconfiguration of charged ions has been limited in heterostructures with chemically reacting Interfaces so far. Here, we demonstrate that a chemical potential mismatch controls oxygen ionic transport across TiO2/VO2 Interfaces, and that this directional transport unprecedentedly stabilizes high-quality rutile TiO2 epitaxial films at the lowest temperature (≤ 150 °C) ever reported, at which rutile phase is difficult to be crystallized. Comprehensive characterizations reveal that this unconventional low-temperature epitaxy of rutile TiO2 phase is achieved by lowering the activation barrier by increasing the “effective” oxygen pressure through a facile ionic pathway from VO2-δ sacrificial templates. This discovery shows a robust control of defect-induced properties at Oxide Interfaces by the mismatch of thermodynamic driving force, and also suggests a strategy to overcome a kinetic barrier to phase stabilization at exceptionally low temperature. The research to utilize chemical potential mismatch for materials synthesis has been limited across the Oxide Interface. Here, the authors show that directional ionic transport from the VO2 layers stabilizes the rutile TiO2 phase at extremely low temperatures, at which epitaxy is difficult, by effectively lowering the activation barrier for crystallization.
