Shape dependence of corrosion kinetics of Si3N4 ceramics in acids (2009)
The corrosion behaviour of Si3N4 ceramics with constant composition (Y2O3 - Al2O3 additives) but of different shapes - plate, cylinder and ball - was investigated in 0.5 mol/l H2SO4 at 90 °C. The...
Micro-EIS of anodic thin oxide films on titanium for capacitor applications (2009)
Schneider, M., Schroth, S., Schilm, J., Michaelis, A.
The present work focuses on the investigation of the effect of the different crystallographic orientation of titanium grains on the formation of anodic oxide films and consequently their dielectric...
Schilm, J., Herrmann, M., Michael, G.
(Continued from Number 26 (2006)16, Page 3909-3917) The corrosion behaviour of Si3N4-ceramics with different grain boundary compositions was investigated in H2SO4 with different concentrations at 90...
Fraunhofer NANO. Aufbruch in die Nanowelt (2006)
Fehrenbacher, U., Gombert, A., Hartwig, A., Heilmann, A., Houbertz, R., Hying, K., ...
Der Zusammenschluss der in der Nano-Technologie engagierten Fraunhofer-Institute zur Allianz NANO konzentriert ein international wettbewerbsfähiges Niveau an Expertise, bündelt einen reichen...
Schilm, J., Gruner, W., Herrmann, M., Michael, G.
The corrosion behaviour of silicon nitride materials in acids strongly depends on the composition and amount of the grain boundary. But there exist no systematic investigations of the relation...
Corrosion behaviour of silicon nitride ceramics in aqueous solutions (2006)
Herrmann, M., Schilm, J., Hermel, W., Michaelis, A.
Silicon nitride ceramics are used under condilions were high strength, hardness and wear resistant is necessary. The increasing use of Si3N4- ceramics as ceramic ball bearings and valves in chemical...
Schilm, J., Gruner, W., Herrmann, M., Michael, G.
The corrosion behaviour of silicon nitride materials in acids strongly depends on the composition and amount of the grain boundary. But there exist no systematic investigations of the relation...
Verfahren zur Ausbildung von Oberflächenschichten auf elektrisch leitenden Substraten (2006)
Herrmann, M., Michael, G., Schilm, J.
DE 102006019808 A1 UPAB: 20071129 NOVELTY - Production of surface layers on an electrically conducting substrate made from carbide comprises electrically connecting the substrate as an electrode,...
Bauteil aus gesintertem Siliciumnitrid und Verfahren zur Herstellung (2005)
Herrmann, M., Schilm, J., Michael, G.
DE1004007540 B UPAB: 20050902 NOVELTY - A sintered silicon nitride component contains 2-15Vol% of sinter additives. A surface region layer with a porosity of at least 2 Vol% is formed by chemical...
Hydrothermal corrosion of zirconia-toughened alumina (ZTA) at 200 ºC (2005)
Herrmann, M., Seipel, B., Schilm, J., Nickel, K.G., Michael, G., Krell, A.
To investigate the corrosion behaviour of zirconia-toughened alumina (ZTA) under hydrothermal corrosion, a commercial material was compared with materials of similar composition, but fabricated using...
Korrosion von gasdruckgesinterten Si3N4-Keramiken in Säuren (2004)
In der Arbeit wurden systematisch die Einfluesse der Werkstoffzusammensetzungen und relevanter Gefuegeparameter von gasdruckgesinterten Si3N4-Keramiken mit amorphen YSiAlON-Korngrenzenphasen auf ihr...
Korrosion von gasdruckgesinterten Si3N4-Keramiken in Säuren (2004)
In der Arbeit wurden systematisch die Einfluesse der Werkstoffzusammensetzungen und relevanter Gefuegeparameter von gasdruckgesinterten Si3N4-Keramiken mit amorphen YSiAlON-Korngrenzenphasen auf ihr...
Corrosion behaviour of Si3N4 materials in sulphuric acid contaminated with KF (2004)
Schilm, J., Herrmann, M., Michael, G.
This work reports on the influence of small amounts of Fluorine ions (<=1 wt.-%) in hot sulphuric acids on the corrosion behavior of gas pressure sintered Si(sub 3)N(sub 4) ceramics with varying...
Korrosion in wässerigen Medien (2004)
Grundlagen der Korrosion in wässerigen Medien werden erläutert.
Leaching behaviour of silicon nitride materials in sulphuric acid containing KF (2004)
Schilm, J., Herrmann, M., Michael, G.
The leaching behavior of gas-pressure-sintered silicon nitride materials with different grain boundary phases was studied in 1 N sulfuric acid at 90 DegC with varying addns. of KF. The progress of...
Corrosion of YSiAlON-glasses in acidic and caustic media (2004)
Schilm, J., Herrmann, M., Michael, G.
The corrosion behavior of YSiAlON-glasses was investigated in acidic and basic environments. In 1n H2SO4 at 90 DegC linear corrosion rates were obsd. for both the mass losses and the change in sample...
Herrmann, M., Schilm, J., Michael, G.
The corrosion behaviour of different technical ceramics (SSiC, LPS SiC, GPSN, PSZ, TZP, ZTA and alumina) was investigated in acids, bases and under hydrothermal conditions. Besides the mass loss...
Herrmann, M., Schilm, J., Michael, G., Meinhardt, J., Flegler, R.
Silicon nitride ceramics with different amounts and compositons of the grain boundary phases are produced by gas pressure sintering and the corrosion behaviour was analysed in acids, bases and under...
Kinetic study of the corrosion of silicon nitride materials in acids (2003)
Schilm, J., Herrmann, M., Michael, G.
The leaching behaviour of gas-pressure-sintered silicon nitride materials with different yttria, alumina and silica contents in 1 N sulfuric acid at 60 to 101 deg C was studied. The progress of...
Herrmann, M., Schilm, J., Michael, G., Adler, J.
New cutting tools, high-strength bioceramics and armor materials all request small sub-.mu.m grain sizes at high sintered densities > 99,5 %, and the business is still more difficult when for highly...
Herrmann, M., Schilm, J., Michael, G.
The corrosion behavior of gas pressure sintered Si nitride ceramics with different amts. and compns. of the grain boundary phases was analyzed in acids, bases and under hydrothermal conditions. The...
Kinetic studies of the corrosion of Si3N4 materials in acids (2002)
Schilm, J., Herrmann, M., Michael, G.
The corrosion processes of Si3N4 materials contg. a glassy grain boundary phase in sulfuric acid at varying temps. was studied. Different ceramics were prepd. by varying the compn. and amt. of the...