Einfache Modelle zur Beschreibung des atmosphärischen DC-Plasmaspritzprozesses. - In: Jahrbuch Oberflächentechnik, ISSN 0075-2819, Bd. 66 (2010), S. 139-148
Literaturangaben
Ohmic contacts to p-GaN using Au/Ni-Mg-O metallization. - In: Journal of electrical engineering, ISSN 1339-309X, Bd. 61 (2010), 6, S. 378-381
https://doi.org/10.2478/v10187-010-0058-8
Structural evolution of sputtered indium oxide thin films. - In: Journal of electrical engineering, ISSN 1339-309X, Bd. 61 (2010), 6, S. 382-385
https://doi.org/10.2478/v10187-010-0059-7
Metallische Werkstoffe und Verbundwerkstoffe stärker im Fokus. - In: International aluminium journal, ISSN 0002-6689, Bd. 86 (2010), 5, S. 58
Metallische Werkstoffe für innovative Anwendungen. - In: Intelligenter produzieren, ISSN 1869-2745, (2010), 3, S. 21-23
Neuartige Aluminiumschaum-Kunststoff-Hybridwerkstoffe für Anwendungen im Leicht- und Strukturbau. - In: Werkstoffe in der Fertigung, ISSN 0939-2629, (2010), 6, S. 34-36
Rezepte für alle : Hochfeste und duktile Stähle, Metallschaum und Aluminium-Kunststoff-Hybride. - In: KEM, ISSN 1612-7226, Bd. 47 (2010), 10, S. 20-21
On the action of magnetic gradient forces in micro-structured copper deposition. - In: Electrochimica acta, ISSN 1873-3859, Bd. 55 (2010), 28, S. 9060-9066
In order to shed more light on the role of magnetic gradient forces and Lorentz forces on the deposition pattern found recently at copper electrodes, experiments and numerical simulations have been performed in a simple geometry that consists of a single small cylindrical permanent magnet which is placed behind the cathode. The cylinder axis coincides with the magnetization direction and points normal to the electrode surface. The electrode is oriented vertically which allows a separate discussion of the influence of both forces. - Experiments and numerical simulations are found to give very good qualitative agreement with respect to the deposition pattern. Our analysis clearly shows that the major influence is due to the action of the magnetic gradient force. Numerical simulations prove that the separate action of the Lorentz force does not reproduce the deposition structure. A detailed analytical discussion of the motion forced by the different magnetic forces in superposition with natural convection is given.
http://dx.doi.org/10.1016/j.electacta.2010.08.046
Magnetic field effects on the mass transport at small electrodes studied by voltammetry and magnetohydrodynamic impedance measurements. - In: Electrochimica acta, ISSN 1873-3859, Bd. 56 (2010), 1, S. 133-138
The effect of moderate magnetic fields (up to 0.75 T) on the redox reaction of the ferro-ferricyanide couple at small disk electrodes (radii 12.5, 50 and 800 m) has been investigated using voltammetric techniques and the magnetohydrodynamic (MHD) transfer function analysis. A special feature of the experimental setup is that it works in the time domain and therefore does not need a lock-in amplifier. The magnetic field was applied parallel to the electrode surface and perpendicular to the gravity force. Special focus was given to the influence of the electrode size and the concentrations of the redox species on the MHD effect. In accordance with literature it was found that the MHD effect decreases with decreasing electrode size and concentration of the electroactive species. Furthermore it was found that the characteristic time constant of the MHD effect increases with decreasing concentration of the electroactive species. Combining the information from the voltammetric and the MHD transfer function data we could estimate the magnetically induced flow velocities which were in a reasonable order of magnitude. The implications of our results for MHD stirring in small feature sizes will be discussed shortly.
http://dx.doi.org/10.1016/j.electacta.2010.09.033
Effects of a magnetic field on growth of porous alumina films on aluminum. - In: Electrochimica acta, ISSN 1873-3859, Bd. 55 (2010), 13/22, S. 4180-4187
The effects induced by a magnetic field on the oxide film growth on aluminum in sulfuric, oxalic, phosphoric and sulfamic acid, and on current transients during re-anodizing of porous alumina films in the barrier-type electrolyte, were studied. Aluminum films of 100 nm thickness were prepared by thermal evaporation on Si wafer substrates. We could show that the duration of the anodizing process increased by 33% during anodizing in sulfuric acid when a magnetic field was applied (0.7 T), compared to the process without a magnetic field. Interestingly, such a magnetic field effect was not found during anodizing in oxalic and sulfamic acid. The pore intervals were decreased by ca. 17% in oxalic acid. These findings were attributed to variations in electronic properties of the anodic oxide films formed in various electrolytes and interpreted on the basis of the influence of trapped electrons on the mobility of ions migrating during the film growth. The spin dependent tunneling of electrons into the surface layer of the oxide under the magnetic field could be responsible for the shifts of the current transients to lower potentials during re-anodizing of heat-treated oxalic and phosphoric acid alumina films.
http://dx.doi.org/10.1016/j.electacta.2010.02.066