Nucleation and growth of oxide islands during the initial-stage oxidation of (100)Cu-Pt alloys

Luo, Langli; Kang, Yunyi; Yang, Judith C.; Zhou, Guangwen

doi:10.1063/1.4907801

Cited by 12 publications

(11 citation statements)

References 41 publications

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“…prepared exactly in the same way but without the presence of the thiol SAM) did not evolve into islands. Hence, while the formation of oxide islands on bare metals, such as aluminium18 and copper–platinum alloy,19 was reported previously in the literature, the nature of the observed features is different here. This suggests that the alkanethiol molecules play an essential role in the formation of lamellar motifs.…”

Section: Resultssupporting

confidence: 40%

Spontaneous growth of 2D coordination polymers on functionalized ferromagnetic surfaces

et al. 2018

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Section: Resultssupporting

confidence: 40%

Spontaneous growth of 2D coordination polymers on functionalized ferromagnetic surfaces

et al. 2018

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“…The slow diffusion of Pt in the Cu-Au alloy not only affects the morphology such as distribution of the oxide island, but also reduces the rate of oxidation [142] . It is found that the nucleation kinetics and morphology can change as the function of oxidation temperature.…”

Section: Cu-pt Alloysmentioning

confidence: 99%

“…%Pt(100) alloy thin film at 800 ˚C and the SAED patterns shown in lower panel are obtained from regions 1, 2, and 3 marked in (a). Figure adapted from Ref[142]…”

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confidence: 99%

Early and transient stages of Cu oxidation: Atomistic insights from theoretical simulations and in situ experiments

et al. 2016

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Understanding of metal oxidation is critical to corrosion control, catalysis synthesis, and advanced materials engineering. Although, metal oxidation process is rather complicated, different processes, many of them coupled, are involved from the onset of reaction. Since first introduced, there has been great success in applying heteroepitaxial theory to the oxide growth on metal surface as demonstrated in the Cu oxidation experiments. In this paper, we review the recent progress in experimental findings on Cu oxidation as well as the advances in the theoretical simulations of the Cu oxidation process. We focus on the effects of defects such as step edges, present on realistic metal surfaces, on the oxide growth dynamics. We show that the surface steps can change the mass transport of both Cu and O atoms during the oxide growth, and ultimately lead to the formation of different oxide morphology. We also review the oxidation of Cu alloys and explore the effect of secondary element to the oxide growth on Cu surface. From the review of the work on Cu oxidation, we demonstrate the correlation of theoretical simulations at multiple scales with various experimental techniques.

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“…Luo et al [24] have performed a detailed in situ TEM investigation of the early oxidation stage on Cu-Au alloys and have determined that alloy composition had a significant effect on the nucleation barrier and the nucleation rate. Increasing the Au in the alloy shifted the nucleation mode from epitaxial to non-epitaxial, i.e., to a higher nucleation rate.…”

Section: The Role Of Two-phase Microstructure and The Sr Surface Actimentioning

confidence: 99%

High Temperature Oxidation Behavior of Hypoeutectic Mg–Sr Binary Alloys: The Role of the Two‐Phase Microstructure and the Surface Activity of Sr

2014

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The high temperature oxidation behavior of Mg-Sr hypoeutectic alloys was investigated. The oxide layer was characterized after isothermal heating experiments that were conducted at 500°C in dry airflow for 12 h. It was seen that a non-uniform oxide scale formed on hypoeutectic Mg-Sr alloys with a two-phase structure whereby the oxide over the interdendritic intermetallic phase had a finer grain size than the oxide over the a-Mg dendrites. The interrupted tests on selected alloys showed that the two phases exhibit different oxidation sequences of Sr and Mg. It was observed that the intermetallic phase oxidizes first with the formation of both MgO and SrO on the surface. The oxidation proceeds with SrO and MgO formation on the a-Mg. This sequence is different from what is predicted as possible via thermodynamic calculations based on the activities of the elements on the two-phases. SEM/EDS analyses revealed that the Sr surface-enrichment has occurred, which explains the differences between the observation and the assessment. Thermodynamic re-assessment suggested that the Sr enrichment on the surface due to the surface activity of Sr in Mg could largely determine the initial oxidation sequence.

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Nucleation and growth of oxide islands during the initial-stage oxidation of (100)Cu-Pt alloys

Cited by 12 publications

References 41 publications

Spontaneous growth of 2D coordination polymers on functionalized ferromagnetic surfaces

Spontaneous growth of 2D coordination polymers on functionalized ferromagnetic surfaces

Early and transient stages of Cu oxidation: Atomistic insights from theoretical simulations and in situ experiments

High Temperature Oxidation Behavior of Hypoeutectic Mg–Sr Binary Alloys: The Role of the Two‐Phase Microstructure and the Surface Activity of Sr

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