Thermal oxidation of amorphous Al0.44Zr0.56 alloys

Weller, Katharina; Jeurgens, Lars P. H.; Wang, Zumin; Mittemeijer, E. J.

doi:10.1016/j.actamat.2014.12.022

Cited by 43 publications

(23 citation statements)

References 57 publications

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“…After the oxidation, the quartz ampoules were immediately quenched in water (T $ 18°C), which promptly terminated the oxidation process. The grown oxide layers have thicknesses in the range of 4 nm to 160 nm (as determined by spectroscopic ellipsometric (SE) investigations, see [15]), depending on T ox , t ox and the parent alloy composition.…”

Section: Oxidation Of Am-al X Zr 1àx Alloysmentioning

confidence: 99%

“…Conversion of the sputter time to the (approximate) sputter depth was done straightforwardly for each sputter-depth profile on the basis of the known oxide-layer thickness as obtained from the SE investigations [15].…”

Section: Structural and Compositional Characterizationmentioning

confidence: 99%

“…at a depth where pure substrate (am-Al x Zr 1Àx alloy) occurs). The relative sensitivity factors for oxidic Al, oxidic Zr and O were obtained following the approach described in [19]. The thus experimentally determined sensitivity factors (with respect to metallic Al) are:…”

Section: Structural and Compositional Characterizationmentioning

confidence: 99%

“…Auger electron spectroscopy (AES) sputter-depth profiling was performed, using a JEOL JAMP 7830F Scanning Auger Microscope (for details of the experimental set-up, see [19]), to obtain information on the compositional distribution in the developing oxide layer and the underlying am-Al x Zr 1Àx alloy substrate. An AES sputter-depth profile was obtained in a so-called discontinuous sputtering mode, where spectra of the Al LMM, Zr MNN and O KLL Auger lines were recorded after each successive ion sputtering step.…”

Section: Structural and Compositional Characterizationmentioning

confidence: 99%

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Thermodynamics controls amorphous oxide formation: Exclusive formation of a stoichiometric amorphous (Al0.33Zr0.67)O1.83 phase upon thermal oxidation of Al–Zr

et al. 2015

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Section: Oxidation Of Am-al X Zr 1àx Alloysmentioning

confidence: 99%

Section: Structural and Compositional Characterizationmentioning

confidence: 99%

Section: Structural and Compositional Characterizationmentioning

confidence: 99%

Section: Structural and Compositional Characterizationmentioning

confidence: 99%

See 2 more Smart Citations

Thermodynamics controls amorphous oxide formation: Exclusive formation of a stoichiometric amorphous (Al0.33Zr0.67)O1.83 phase upon thermal oxidation of Al–Zr

et al. 2015

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“…The composition of the deposited Al x Zr 1Àx solid solutions was determined by comparing the measured AES intensities with AES intensities of homogeneous amorphous Al x Zr 1Àx solid solutions prepared under similar conditions with known concentration, as determined by inductively coupled plasma optical emission spectrometry (for details, see Refs. [47][48][49]. The concentrations of the Zr-rich layers are either x Al ¼ 27 at.…”

Section: Experimental Procedures a Specimen Preparationmentioning

confidence: 99%

Interdiffusion in amorphous AlxZr1-x alloys

Noah

Wang

Mittemeijer

2017

Journal of Applied Physics

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Interdiffusion in amorphous AlxZr1−x compositionally modulated multilayers was investigated by Auger electron spectroscopy sputter-depth profiling. Microstructural characterisation was performed by X-ray diffraction and cross-sectional transmission electron microscopy. The temperature-dependent chemical diffusion coefficient could be deduced at a series of temperatures in the range of 356 °C to 415 °C and was found to be weakly dependent on composition. The activation enthalpy for the chemical diffusion coefficients is slightly smaller at the composition of the Al-rich am-Al0.62Zr0.38 sublayer (1.6 eV) than at the composition of the Zr-rich am-Al0.27Zr0.73 sublayer (1.8 eV), which is not related to the concentration dependence of the excess free volume but to the smaller atomic size and mass of Al as compared to Zr. The smaller activation enthalpy for interdiffusion in partially crystallised specimens than in entirely amorphous AlxZr1−x multilayers is ascribed to the relatively large excess free volume in the grain boundaries of the nanocrystalline sublayers, as compared to the amorphous phase, at large Al concentrations. On the basis of an evaluation of the role of diffusion-induced stress in amorphous systems, it is shown that stresses induced by interdiffusion relax relatively fast by viscous flow and do not affect the determined diffusion coefficients.

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Influence of Oxidation on Structure, Performance, and Application of Metallic Glasses

et al. 2022

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Owing to their unique structure and outstanding properties, metallic glasses are a novel class of structural and functional materials with vast application prospects. However, the metastable amorphous structures and chemical activity of metallic glass constituent elements lead to frequent oxidation during preparation, processing, and application. Comprehensively understanding the oxidation behaviors and underlying mechanisms of metallic glasses is essential for gaining knowledge of metallic glass structures and properties and for promoting engineering applications. Although many studies have examined these issues, more investigations are still required to explore potential industrial applications of metallic glasses. Here, recent research on metallic glass oxidation is consolidated by summarizing the oxidation influence on metallic glass structure, performance, and application and the possibilities and feasibility of oxidizing metallic glasses to reinforce materials or develop material systems are discussed.

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Thermal oxidation of amorphous Al0.44Zr0.56 alloys

Cited by 43 publications

References 57 publications

Thermodynamics controls amorphous oxide formation: Exclusive formation of a stoichiometric amorphous (Al0.33Zr0.67)O1.83 phase upon thermal oxidation of Al–Zr

Thermodynamics controls amorphous oxide formation: Exclusive formation of a stoichiometric amorphous (Al0.33Zr0.67)O1.83 phase upon thermal oxidation of Al–Zr

Interdiffusion in amorphous AlxZr1-x alloys

Influence of Oxidation on Structure, Performance, and Application of Metallic Glasses

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