Va — Metalle

Hörz, Gerhard; Fromm, E.

doi:10.1007/978-3-642-80943-9_13

Cited by 6 publications

(5 citation statements)

References 114 publications

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“…Such a behaviour is typical, even for thin metal samples, in metal-gas systems exhibiting an endothermic (or weak exothermic) solution of the gas and rather low values of the diffusion coefficient of the gas in the solvent metal [17]. Examples are nitrogen desorption of molybdenum and tungsten [17]. Counter examples are nitrogen desorption of niobium and tantalum [17] and oxygen desorption of silver [15], where the desorption of thin metal samples is controlled by the recombination of dissolved gas atoms at the metal surface to form gas molecules.…”

Section: Absorption and Desorption Experimentsmentioning

confidence: 94%

Section: Absorption and Desorption Experimentsmentioning

confidence: 97%

“…Counter examples are nitrogen desorption of niobium and tantalum [17] and oxygen desorption of silver [15], where the desorption of thin metal samples is controlled by the recombination of dissolved gas atoms at the metal surface to form gas molecules. These metal-gas systems show a strong exothermic solution of gas in the solvent metal [17].…”

Section: Absorption and Desorption Experimentsmentioning

confidence: 99%

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Diffusivity and solubility of oxygen in solid palladium

Gegner

Hörz²,

Kirchheim

2009

J Mater Sci

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Section: Absorption and Desorption Experimentsmentioning

confidence: 94%

Section: Absorption and Desorption Experimentsmentioning

confidence: 97%

Section: Absorption and Desorption Experimentsmentioning

confidence: 99%

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Diffusivity and solubility of oxygen in solid palladium

Gegner

Hörz²,

Kirchheim

2009

J Mater Sci

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“…)[10,11]: I. H2 transport in the gas phase and molecular adsorption (physisorption)II. H2 dissociation and chemisorption of H atoms III.…”

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confidence: 99%

Effect of Oxide Layers on the Absorption Kinetics of Hydrogen by Metals at Room Temperature*

Fromm¹

1986

Zeitschrift Für Physikalische Chemie

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Hydrogen in metals / Absorption kineticsOxide layers on metal surfaces impede or prevent hydrogen absorption at temperatures below 400°C. This passivation can be caused by slow dissociation of H2 molecules on the surface, slow transfer of chemisorbed H atoms into the oxide, or by slow H permeation through the oxide layer. Experiments on the H2 absorption kinetics of film samples with known oxygen precoverage yield a direct access to reaction models if relevant results of other techniques are regarded appropriately as well as inherent thermochemical and atomistic limits. Typical examples are discussed to elucidate this approach for the investigation of complex reaction mechanisms in H2 absorption kinetics at room temperatures.Oxidschichten auf Metalloberflachen behindern oder unterdnicken die Wasserstoffaufnahme bei Temperaturen unterhalb 400°C. Diese Passivierung kann durch langsame Dissoziation von H2-Molekiilen auf der Oberflache, durch einen langsamen Durchtritt chemisorbierter H-Atome ins Oxid oder durch eine langsame Permeation der H-Atome durch die Oxidschicht verursacht werden. Experimente an Filmproben mit bekannter Sauerstoffvorbelegung ermoglichen die Uberprufung von Reaktionsmodellen, die aufgrund von Ergebnissen mit anderen Verfahren und in Abstimmung mit bekannten thermochemischen und atomistischen Daten aufgestellt worden sind. Dieses Vorgehen zur Aufkliirung komplexer Reaktionsmechanismen bei der Wasserstoffaufnahme von Metallen bei Raumtemperatur wird durch einige typische Beispiele aufgezeigt.

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“…This signal variation can be fitted using diffusion theories (Fick laws). Under the assumption that the oxygen indiffusion process is thermally activated, the solution of the one-dimensional Fick equation can be used [27]:…”

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confidence: 99%

In situ monitoring of La_0.67Sr_0.33MnO₃ monolayers grown by pulsed laser deposition

Esteve

Postava

Gogol

et al. 2010

Physica Status Solidi (b)

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Integration of functional oxides on silicon is a key issue for the development of oxide-based electronics. For this purpose, monitoring the growth of these materials by an in situ technique becomes essential to control the thickness, the roughness and the oxidation state of the layers. Using a new static optical setup, i.e. with no modulation, we have studied the deposition and the annealing of pulsed-laser deposited La 0.67 Sr 0.33 MnO 3 monolayers on pseudosubstrates SrTiO 3 (100)/Si at high temperature. We show that using the ratio of reflectance for the two different polarizations (s,p) R p /R s ¼ tan 2 c of the optical signal after reflection, we can follow, in situ, the growth of monolayers (ML) with a precision of one unit cell. Also, the growth mode and the annealing process leading to the determination of the activation energy can be precisely controlled. All these results are corroborated by X-ray diffraction (XRD) and atomic force microscopy (AFM). Using this static measurement method, the obtained results are as sensitive as previous reports with, for example, oblique incidence reflectivity difference (OI-RD).

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Va — Metalle

Cited by 6 publications

References 114 publications

Diffusivity and solubility of oxygen in solid palladium

Diffusivity and solubility of oxygen in solid palladium

Effect of Oxide Layers on the Absorption Kinetics of Hydrogen by Metals at Room Temperature*

In situ monitoring of La_0.67Sr_0.33MnO₃ monolayers grown by pulsed laser deposition

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Va — Metalle

Cited by 6 publications

References 114 publications

Diffusivity and solubility of oxygen in solid palladium

Diffusivity and solubility of oxygen in solid palladium

Effect of Oxide Layers on the Absorption Kinetics of Hydrogen by Metals at Room Temperature*

In situ monitoring of La0.67Sr0.33MnO3 monolayers grown by pulsed laser deposition

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In situ monitoring of La_0.67Sr_0.33MnO₃ monolayers grown by pulsed laser deposition