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Charrin, L.; Combe, A.; González, G.; Charaı̈, A.

doi:10.1023/a:1013342712546

Cited by 6 publications

(7 citation statements)

References 11 publications

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“…In the absence of In, Ag-Sn alloys have a strong tendency to form oxide bands [8][9][10] similar to the periodic oxide bands observed in internally oxidized Ag-Mg alloys [11,12]. Ternary In additions of more than 2 wt.% accelerate the internal oxidation kinetics and avoid internal oxide bands [1] in Ag-Sn alloys.…”

Section: Introductionmentioning

confidence: 98%

Study on the Microstructure of Internally Oxidized Ag–Sn–In Alloys

et al. 2008

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The microstructures of five internally oxidized Ag-Sn-In materials were investigated using ion polishing, field emission scanning electron microscopy and electron backscatter diffraction. The ion polished sections showed a subtle material contrast in the oxide particles that could be attributed to different oxide phases generated during internal oxidation. The phases could be identified as tetragonal SnO 2 that surrounds the cubic In 2 O 3 core of the combined oxide particles. It is shown that In 2 O 3 exhibits an orientation relationship to the Ag matrix and for SnO 2 and Ag another orientation relationship is likely. Interrupted internal oxidation experiments were applied to identify the growth mechanism of the oxide particles. A consistent view on the role of In during the internal oxidation of Ag-Sn-In alloys as heterogeneous nucleation agent of SnO 2 is presented.

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Section: Introductionmentioning

confidence: 98%

Study on the Microstructure of Internally Oxidized Ag–Sn–In Alloys

et al. 2008

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“…In some alloys, such as Ag-Sn or Ag-Mg [33,34], diffusion barriers in the form of internal oxide bands parallel to the surface hinder the diffusion of Ag towards the surface and reduce the amount of exuded Ag. In contrast, the kinetics of Ag exudation will be accelerated if the dislocation density rises and diffusion occurs preferentially along dislocation pipes.…”

Section: Discussionmentioning

confidence: 99%

On the mechanism of Ag exudation during internal oxidation

Schimmel¹,

Sorina-Müller²,

Kempf³

et al. 2010

Acta Materialia

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“…Then, single crystals were made by the Bridgman method, as reported in previous work. 13 The X-ray diffraction experiments were performed at European Synchrotron Radiation Facility (ESRF) on ID01 beam line with a wavelength of 0.1649 nm. A four-circle goniometer, equipped with a position-sensitive detector spanning a 2.5°angular aperture and having an angular resolution of 0.005°was used.…”

Section: Methodsmentioning

confidence: 99%

“…Elsewhere, it has been also reported that the solute content and the temperature determine the formation, morphology and size of clusters. [12][13][14][15] For instance, at high temperatures, the internal oxidation of dilute alloys (% 2 at.% or less) leads to a dispersed oxide within the matrix. The oxidation of moreconcentrated Mg alloys leads to the formation of periodic bands parallel to the surface.…”

Section: Introductionmentioning

confidence: 99%

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First Stages of Internal Oxidation in Ag-0.29 and 2.89 at. % Mg Single-Crystal Alloys

et al. 2006

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Internal oxidation of Ag-0.29 and 2.89 at.% Mg alloys was studied by in-situ X-ray measurements at 300°C. The kinetics and lattice-parameter changes as a function of time are discussed in terms of the formation of elementary MgO* species and non-stoichiometric clusters, during the first stages of oxidation. Studies were made using synchrotron radiation on single-crystal samples. The distorted zone, formed near the surface, was detected by measuring the position and the intensity of the (022) silver peak in the solid-solution alloy. From the diffraction-peak changes, information is deduced on the growth kinetics of the expanded layer. Oxygen diffusivity in silver, C 0 D 0 , is calculated on the basis of Wagner's law. At an early stage, the oxygen diffusivity is slightly lower than the theoretical value. During a second stage, accelerated kinetics give a very high C 0 D 0 value. We determined the O/Mg ratios at different stages during oxidation.

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Cited by 6 publications

References 11 publications

Study on the Microstructure of Internally Oxidized Ag–Sn–In Alloys

Study on the Microstructure of Internally Oxidized Ag–Sn–In Alloys

On the mechanism of Ag exudation during internal oxidation

First Stages of Internal Oxidation in Ag-0.29 and 2.89 at. % Mg Single-Crystal Alloys

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