Browsing Fakultät für Physik (inkl. GAUSS) by Referee "Kirchheim, Reiner Prof. Dr."
Now showing items 1-20 of 37
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Interlayer effect on the hydrogen uptake in Vanadium films: Stress development, surface topography and optical behavior changes
(2023-07-13)The purpose of this study is to investigate hydrogen absorption-related properties changes of nanocrystalline thin films by varying the elastic constraints condition. The elastic constraint condition is varied by using ... -
Mikrostrukturänderungen durch hohe elektrische Stromdichten in Eisen-Kohlenstoff Dünnschichten
(2021-08-11)Processing of materials with high electric and magnetic fields is a growing topic in material science. Yet, the interactions of fields and currents are complex and not fully understood. Therefore, the impact of high direct ... -
Hydrogen diffusion and hydride formation in grain boundary rich magnesium
(2019-05-06)In the last decade Magnesium (Mg) has attracted much interest as a storage material for hydrogen in a future hydrogen energy based economy. The reasons are its high reversible hydrogen capacity of up to 7,6 wt% and its ... -
In situ studies on palladium/rutile titanium dioxide exposed to low pressure hydrogen gas environments
(2018-11-12)The interaction of hydrogen gas with the palladium/rutile titanium dioxide model system was investigated with strong focus on the interface and its vicinity. Palladium (Pd) films were deposited on pretreated rutile titanium ... -
Zur Wasserstoff-induzierten Riss- und Blisterbildung in Eisen
(2017-01-27)Hydrogen-induced damage is a serious problem in various applications of metals. In this work, hydrogen-induced cracking in iron was investigated. The samples were loaded with hydrogen electrochemically. The loading results ... -
Hydrogen absorption property of nanocrystalline-magnesium films
(2016-11-07)The purpose of this study is to investigate hydrogen absorption properties of grain boundary rich pure magnesium film. X-ray diffraction (XRD) measurements has been carried out to estimate microstructures, texture, lattice ... -
Einfluss von gelöstem Wasserstoff auf die Versetzungsbildung bei plastischer Verformung von Metallen
(2016-03-11)Dissolved hydrogen in metals leads in many cases to a reduction in the quality of mechanical properties. There are many effects that can be attributed to the solution of hydrogen. These are collectively referred to as ... -
Extended TOF-SIMS analysis on low-nickel austenitic stainless steels: The influence of oxide layers on hydrogen embrittlement
(2016-01-18)Hydrogen embrittlement (HE) of low-nickel austenitic stainless steels were studied with special attention to the impact of the microstructural properties such as strain induced α’-martensite, grain size, dislocation density ... -
Dünne Palladium-Wasserstoff-Schichten als Modellsystem: Thermodynamik struktureller Phasenübergänge unter elastischen und mikrostrukturellen Zwangsbedingungen
(2015-07-07)Using the formation of a hydride phase in palladium-hydrogen thin films with 5 nm to 2000 nm thickness as a model, this work investigates the impact of film thickness as well as microstructural and elastic constraints on ... -
Untersuchung der elektrischen Hyperfeinwechselwirkung in M<sub>n+1</sub>AX<sub>n</sub>-Phasen mittels der gestörten γ-γ-Winkelkorrelation
(2014-05-19)Mn+1AXn phases are thermodynamically stable nanolaminated ternary carbides and nitrides showing both metallic and ceramic properties. The letter M stands for an early transition metal, the letter A represents an A-element ... -
Nickel-Diffusion in α-Eisen übersättigt mit Kohlenstoff
(2013-07-18)In cold-drawn pearlitic steel wires dissociation of cementite occurs during mechanical deformation. This phenomenon has substantial influence on the physical properties of the material owing to the defect structure which ... -
Hydrogen in V-Fe thin films and Fe/V-Fe multi-layered thin films
(2011-11-25)In this thesis, hydrogen induced biaxial stress and local distribution of hydrogen in V-Fe films and V-Fe/Fe multi-layered films were investigated. The stress development and stress relaxation ... -
Untersuchung atomarer Strukturen an geordnetem und nanokristallinem ternären Fe3Al
(2011-08-25)This work presents a study of the atomic ordering of Fe3Al with the additions chromium, manganese, titanium and vanadium. This knowledge is the basis of a complete comprehension of the ... -
Korrelationen zwischen struktureller Ordnung und elektrischen Transporteigenschaften in CoFeB|MgO|CoFeB Tunnelmagnetowiderstandselementen
(2010-10-19)Magnetic tunnel junctions with amorphous ferromagnetic CoFeB electrodes and a crystalline MgO Barrier show a very high tunnel magnetoresistance (TMR). In epitaxial systems of Fe/MgO/Fe(001) ... -
Struktur, Wachstum und Phasenumwandlungen dünner Eisen-Palladium Schichten
(2010-09-06)Iron-Palladium is a modern functional material, which shows a great variety of physical effects that can be used in many different technical applications. In this work, the influence of ... -
Phasenbildung, Phasenübergang und mechanische Eigenschaften des Funktionsmaterials Eisen-Palladium
(2010-09-03)The alloy Iron-Palladium is a smart material whose properties can be strongly influenced in several ways. If the Palladium content is about 30%, the material undergoes a martensitic ... -
Untersuchung der lokalen strukturellen und elektronischen Eigenschaften von Fe-GaAs Schottky-Kontakten mit atomar aufgelöster Raster-Tunnel-Mikroskopie in Querschnittsgeometrie
(2009-11-03)In this paper we present the first real space investigation of the Fe-GaAs{110} interface with Scanning Tunneling Microscopy and Spectroscopy across the interface. This new approach enables ... -
Mechanical Properties of Icosahedral Viral Shells. A Molecular Dynamics Study
(2009-04-03)The mechanical properties of viral shells are crucial for viral assembly and infection. To study their distribution and heterogeneity on the viral surface, we have carried out atomistic ... -
Investigation of the Amorphization of iron and austenitic stainless steel films by supersaturation with Boron, Carbon, Nitrogen and Oxygen
(2008-12-10)This work investigates the amorphization behavior of Fe-based alloys and the formation of metallic glasses based on conventional.It is well known, that small additions of alloying elements ... -
Feldinduzierte Tieftemperaturoxidation nanoskaliger Metall- und Halbleiterstrukturen
(2008-12-04)At the surface of almost all metals and semiconductors oxide formation occurs when exposed to atmosphere. The oxidation reaction proceeds along a number of partial reaction steps with the ...