Institution
DECHEMA
Nonprofit•Frankfurt am Main, Germany•
About: DECHEMA is a nonprofit organization based out in Frankfurt am Main, Germany. It is known for research contribution in the topics: Corrosion & Oxide. The organization has 756 authors who have published 1307 publications receiving 25693 citations.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, a fine-and coarse-grain 25Cr-20Ni steel was compared with a cast steel of similar composition in synthetic air between 900 and 1300°C and showed a strong influence of grain growth in the base metal on the oxidation behavior.
Abstract: Comparative oxidation tests with a fine- and a coarse-grain 25Cr-20Ni steel, and cast steel of similar composition in synthetic air between 900 and 1300°C reveal a strong influence of grain growth in the base metal on the oxidation behavior. Metal grain growth destroys the protective Cr2O3-rich scale, and promotes the formation of a scale rich in iron oxides. The result is a higher scaling rate, and a higher Cr depletion at the metal-scale interface of the fine-grain material which undergoes grain growth during oxidation.
14 citations
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TL;DR: In this paper, a scanning Kelvin probe (SKP) and X-ray photoelectron spectroscopy (XPS) images reconstructed the solution-air boundary on corroded samples.
14 citations
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01 Nov 2010-Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms
TL;DR: In this article, the fluorine profiles of TiAl alloys were measured before and after oxidation at 900°C using non destructive ion beam analyses: Proton Induced Gamma-ray Emission (PIGE), Rutherford Backscattering Spectroscopy (RBS) as well as Elastic Recoil Detection Analysis (ERDA).
Abstract: The modification of the alloy surface by halogens significantly improves their oxidation behaviour at high temperature. It corresponds to the preferential reaction of the aluminium with the applied fluorine at the oxide/alloy interface and it promotes the growth of an adherent and stable alumina layer. Well-defined fluorine profiles beneath the surface of the material can be achieved by either fluorine beam line ion implantation (BLI 2 ) or plasma immersion ion implantation (PI 3 ). As an alternative to the implantation-based approach, chemical fluorination techniques such as gas-phase treatment and dipping in F-based solutions were also investigated. The fluorine depth-profiles were measured before and after oxidation at 900 °C using non destructive ion beam analyses: Proton Induced Gamma-ray Emission (PIGE), Rutherford Backscattering Spectroscopy (RBS) as well as Elastic Recoil Detection Analysis (ERDA). It enables to control and to optimise the fluorination conditions of technical TiAl alloys for an industrial application.
13 citations
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TL;DR: The results demonstrate that heterogeneous photocatalytic reactions can be very efficient and productive at the same time and may therefore present a powerful tool in synthetic organic chemistry.
Abstract: The photocatalytic reduction of nitrobenzene to aniline in alcoholic solutions appears as an interesting alternative to the classical hydration. However, little is known about the influence of reaction parameters on the kinetics of the reaction which were therefore studied herein. The effects of light intensity, catalyst concentration, initial concentration, and temperature were systematically investigated under more than 50 different conditions and accurately described with an appropriate kinetic model. The results show that the efficiency of the reaction is extremely high and apparent quantum yields of up to 142 % were observed under optimized conditions. Particularly interesting is the fact high efficiencies were also obtained at high reaction rates of up to 74.3 mM h-1. Overall these results demonstrate that heterogeneous photocatalytic reactions can be very efficient and productive at the same time and may therefore present a powerful tool in synthetic organic chemistry.
13 citations
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TL;DR: In this article, the authors investigated the Sulfatchmelze-Potential-Kurven der Metalle Pt, Ag, Ni, and Cu in anodischen kathodische Korrosion.
13 citations
Authors
Showing all 760 results
Name | H-index | Papers | Citations |
---|---|---|---|
Wolf B. Frommer | 105 | 345 | 30918 |
Michael W. Anderson | 101 | 808 | 63603 |
João Rocha | 93 | 1521 | 49472 |
Martin Muhler | 77 | 606 | 25850 |
Michael Hunger | 60 | 295 | 11370 |
Ivars Neretnieks | 44 | 224 | 7159 |
Michael Schütze | 40 | 343 | 6311 |
Jens Schrader | 38 | 129 | 4239 |
Roland Dittmeyer | 31 | 206 | 3762 |
Lei Li | 29 | 198 | 4003 |
Dirk Holtmann | 29 | 107 | 3033 |
Lasse Greiner | 26 | 74 | 1994 |
Klaus-Michael Mangold | 23 | 57 | 1590 |
A. Rahmel | 23 | 59 | 1967 |
Gerhard Kreysa | 22 | 78 | 1305 |