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  • 1
    Electronic Resource
    Electronic Resource
    Physik (1991)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 25 (1991), S. viii 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19910250212
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  • 2
    Electronic Resource
    Electronic Resource
    Solution of the10Li-Puzzle (1993)
    Springer
    The European physical journal 344 (1993), S. 381-393 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Dr ; 25.70.Cd ; 27.20.+ n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The mass of10Li has been measured with two different reactions:9Be(13C,12N)10Li,E Lab=336 MeV, and13C(14C,17F)10Li,E Lab=337 MeV. The mass excess of 33.445(50) MeV is deduced from theQ-value measurement.10Li is found to be particle-unstable with respect to one-neutron emission by 0.42(5) MeV. In the analysis of the first reaction a low lying excited state is found at 0.38(8) MeV. This state and the ground state can be most probably identified as the 1+/2+-doublet coupled from the [π 1p3/2 ⊗ν 1p 1/2] configuration, the 1+-state being the ground state. The (13C,12N)-reaction populates the 1+-state strongly due to a spin-isospin-flip character of the dominant part of the transition amplitude. The 2+-member corresponds to the mass given by Wilcox et al. A second excited state is observed at 4.05(10) MeV with a width of 0.7(2) MeV, it can be associated with theν 1d 5/2-strength. The second reaction is fully supporting the interpretation of the ground state doublet. The excited state at 4.05 MeV is not observed in this reaction and indeed it should not, because the reaction does not populate in first order excited neutron configurations. The levels are well described by mean field calculations including pairing correlations. The lowest resonance in the calculations is theν 1/2−-configuration, whereas theν 1/2+-configuration shows at the neutron threshold a strong non-resonant contribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01283193
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  • 3
    Electronic Resource
    Electronic Resource
    Refractive scattering and reactions, comparison of two systems:16O+16O and20Ne+12C (1993)
    Springer
    The European physical journal 346 (1993), S. 189-200 
    Details
    ISSN: 1434-601X
    Keywords: 24.10.-i ; 24.10.Eq ; 24.20.Ht ; 25.70.Cd
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Elastic, inelastic scattering as well as one-neutron transfer channels have been measured over a wide angular range for systems16O+16O at the incident energy of 350 MeV and20Ne+12C at 390 MeV, respectively, using the Q3D magnetic spectrometer. In both cases differential cross sections have been measured down to about 50 nb/sr (or dσ/dσ R≤10−4) at large angles. For the16O+16O system refractive contributions are found at the level of these cross sections, whereas in the20Ne+12C case a steeper decrease of the differential cross section with the angle is observed and the refractive contribution can not be determined. The elastic scattering data have been analyzed using standard Woods-Saxon potentials and potentials calculated in different versions of the double-folding model. Some properties of these potentials are tested in the calculations for inelastic scattering and one-neutron transfer within the DWBA. With the refractive pattern observed for the16O+16O system, the scattering and transfer data are found to be sensitive to the interaction potential at small internuclear distances down to about 2.5 fm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01306079
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  • 4
    Electronic Resource
    Electronic Resource
    Mass spectroscopy of13Be (1992)
    Springer
    The European physical journal 343 (1992), S. 489-490 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Dr ; 25.70.Cd ; 27.20.+n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The mass of 13 Be has been measured with the reaction 13 C(14 C,14 O)13 Be at E Lab =337 MeV. A Q-value of Q 0=−37.02(5) MeV was obtained and the mass excess is M.E.=35.16(5) MeV. If the observed line corresponds to the ground state,13 Be is particle unstable with respect to the oneneutron emission by 2.01 MeV. The observed line width of 0.3(2) MeV supports an assignment ofJ π=5/2+ or 1/2−, but excludesJ π=1/2+. An excited state is seen at 3.12(7) MeV; there are indications of a second excited state at 6.5(2) MeV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289828
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  • 5
    Electronic Resource
    Electronic Resource
    W. G. Jennings, J. G. Nikelly (Hrsg.): Capillary Chromatography - The Applications. Erste Auflage, 153 S., 54 Abb., 29 Tab., Hüthig Buchverlag GmbH, Heidelberg 1991. Chromatographic Methods. Hardcover. 88, - DM (1992)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 334 (1992), S. 194-194 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19923340221
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  • 6
    Electronic Resource
    Electronic Resource
    Elektrochemischer Detektor mit einer Kohlefaserbündel-Arbeitselektrode für die HPLCHerrn Prof. Dr. Rolf Borsdorf zum 60. Geburtstag gewidmet (1992)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 334 (1992), S. 49-52 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: HPLC-Electrochemical Detector with a Carbon Fiber Working ElectrodeThe paper describes an electrochemical detector with carbon fibers as the working electrode placed perpendicularly to the flow direction. The detector performance was characterized by the detection limit for selected phenolic compounds, reproducibility, linearity and the signal dependence on the flow rate. An electrochemical in situ pretreatment of the working electrode improves sensitivity and long term stability.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19923340109
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  • 7
    Electronic Resource
    Electronic Resource
    Das Alitieren von Stählen als Schutz gegen die Hochtemperatursulfidierung in Schwefel und in H2S-haltigen GasenAuszug aus der Dissertation Th. Uihlein [1]; Universität Erlangen-Nürnberg, 1988. (1990)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 41 (1990), S. 585-599 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Aluminizing of steels for protection against high-temperature sulphidation in liquid sulphur and in H2S-containing atmospheresThe aluminizing of a structural steel (Werkst. Nr. 1.7335), a stainless steel (1.4306) and a heat resistant steel (1.4876) has been optimized with respect to the maximal attainable aluminum content, the freedom from porosity and cracks and the homogeneity of phases in the aluminized layer. The nickel was found to be predominantly important, as together with Kirkendall porosity it governs the thermal stability of aluminized layers during corrosion and oxidation.High-temperature corrosion was examined in liquid sulphur, in H2/H2S- and in H2/H2S/H2O-atmospheres. In liquid sulphur the aluminized layer of austenitic steels fails by the occurrence of a periodically alternating sulphidation reaction which destroys the protective layer at 495°C. In gaseous mixtures the stability depends on the quality of an Al2O3-film on the aluminized layer which inturn is governed by the chemical composition of the aluminized layer. Beyond 900°C the transport of sulphur through Al2O3 occurs by simultaneous grain boundary-(“short circuit-”) and volume diffusion.
    Notes: Die Alitierung je eines Baustahles (Werkst. Nr. 1.7335), eines rostfreien Stahles (1.4306) und eines hitzebeständigen Stahles (1.4876) wurde hinsichtlich des maximal erreichbaren Aluminiumgehaltes, der Freiheit von Poren und Rissen und der Homogenität der Schutzschicht optimiert. Als wesentliche Einflußgröße für die Schutzschichtbildung wurde der Nickelgehalt festgestellt, von der, gemeinsam mit der Kirkendallporosität, die thermische Stabilität bei korrosiver und oxidativer Belastung entscheidend abhängt.Die Hochtemperaturkorrosion wurde in flüssigem Schwefel, in H2/H2S- und in H2/H2S/H2O-Gemischen untersucht. In flüssigem Schwefel versagt die Alitierschicht der autenitischen Stähle durch eine periodisch alternierende Sulfidierungsreaktion, die die Schutzschicht bei 495°C zerstört. In den Gasgemischen hängt die Beständigkeit von der Schutzwirkung des Al2O3-Filmes auf der Alitierschicht ab, dessen Qualität durch die chemische Zusammensetzung der Schicht bedingt ist. Oberhalb 900°C wurde im übrigen für den Schwefeltransport im Al2O3 neben der Korngrenzen-(“Kurzschluß-”) Diffusion auch Volumendiffusion nachgewiesen.
    Additional Material: 25 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19900411007
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  • 8
    Electronic Resource
    Electronic Resource
    CORIS®: Korrosionsdatenbank (1993)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 44 (1993), S. 402-409 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: CORIS™: Corrosion data baseIn this paper the main component of the CORIS system, the corrosion database, is presented. The database contains corrosion facts for metallic materials with respect to all important corrosion parameters. E/R-Models (Entity-Relationship-models) were used for structuring the corrosion knowledge, and the functionality of the system is described in detail from the conceptual and the practical point of view. The system offers the possibility to enter own corrosion data as well as to evaluate stored data. The graphical interactive user interface was designed for simple use.
    Notes: In der vorliegenden Arbeit wird die Kernkomponente des Systems CORIS, die Korrosionsdatenbank, vorgestellt. In ihr sind Korrosionsfakten unter Berücksichtigung aller relevanten Parameter abgelegt. Es wird die dem System zugrunde liegende Korrosionsstruktur mit Hilfe von E/R-Modellen (Entity-Relationship-Modelle) erläutert und ein detaillierter Einblick in die Funktionalität und das Erscheinungsbild gegeben. Das System bietet dem Anwender die Möglichkeit, sowohl eigene Korrosionserfahrungen abzulegen als auch unter Eingabe von Suchbedingungen vorhandenes Wissen zu recherchieren. Die graphisch interaktive Benutzeroberfläche ist auch für ungeübte DV-Nutzer leicht zu bedienen.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19930441004
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  • 9
    Electronic Resource
    Electronic Resource
    Mikrobielle Werkstoffzerstörung - Simulation, Schadensfälle und Gegenmaßnahmen für anorganische nichtmetallische Werkstoffe: Biodeteriorationsprozesse an anorganischen Werkstoffen und mögliche Gegenmaßnahmen (1994)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 45 (1994), S. 105-113 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Microbial deterioration of materials - simulation, case histories, and countermeasures for inorganic nonmetallic materials: Biodeterioration processes on inorganic materials and means of countermeasuresBiodeterioration processes on inorganic materials such as natural stone, concrete, or glass can be subdivided into biogeochemical and biogeophysiological mechanisms according to their damage characteristics. In connection with the partial acidification and dissolving of components, biocorrosion as a result of biogenic release of inorganic and organic acids, as well as the biogenic oxidation of mineral forming cations, a certain weakening in the structure of the respective material can occur. The formation of biofilms on the surfaces of the inorganic materials impairs not only the aesthetical appearance of an object but also causes alterations in its humidity and temperature behaviour. In addition, due to the shrinking and swelling effects of biofilms, mechanical pressure to the mineral unit can occur (bioerosion, bioabrasion). Location and environmental factors which could lead to specific, biogenically determined weathering phenomena on these materials will be presented and elucidated. For controlling biodeterioration processes, the development and selection of environmentally-friendly, yet effective, inorganic and organic biocidal additives for stoneprotection agents as well as the use of gas (e.g. ethylene oxide) in their far-reaching significance for future material research will be presented here.
    Notes: Biodeteriorationsprozesse an anorganischen Werkstoffen wie Naturstein, Beton oder Glas können in ihren Schädigungsweisen nach biogeochemischen und biogeophysikalischen Mechanismen unterteilt werden. Im Zusammenhang mit der partiellen Ätzung und Lösung von Bestandteilen, hervorgerufen durch die biogene Freisetzung anorganischer bzw. organischer Säuren (Biokorrosion) sowie der biogenen Oxidation mineralbildender Kationen (Biooxidation), kommt es zur Schwächung, des Gefüges im jeweiligen Werkstoff. Durch den Aufwuchs von Biofilmen auf den Oberflächen anorganischer Materialien kommt es neben ästhetischen Beeinträchtigungen auch zu Veränderungen im Feuchte- und Temperaturverhalten des Werkstoffes sowie aufgrund von Schrumpfungs- und Quellungsprozessen von Biofilmen zu mechanischer Druckbelastung auf den Mineralverband (Bioerosion, Bioabrasion). Standort- und Umweltfaktoren, die zu entsprechend biogenen Verwitterungsphänomenen an anorganischen Werkstoffen führen, werden vorgestellt und erläutert. für die Bekämpfung der Biodeteriorationsprozesse werden die Entwicklung und Auswahl umweltgerechter, aber dennoch wirksamer anorganischer bzw. organischer biozider Zuschlagstoffe für Gesteinsschutzstoffe sowie Begasungen (z. B. Ethylenoxid) in ihrer weitreichenden Bedeutung für die zukünftige Materialforschung vorgestellt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19940450207
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  • 10
    Electronic Resource
    Electronic Resource
    Untersuchung der Strahlverschleißbeständigkeit von Werkstoffen und Beschichtungen mit Hilfe eines Wirbelbett-Testverfahrens (1990)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 41 (1990), S. 623-634 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigation into the blasting wear resistance of materials and coatings using fluidized-bed processThe coatings for compressor blades and gas turbine blades - e.g. corrosion protection coatings or thermal barrier coatings - will be damaged by an additional erosive stress. Because the main function of the coatings is not the erosion protection but the corrosion protection respectively the thermal barrier, they have mostly a worse erosion behavior as the blade material. The actual protection effect of the coatings will be reduced importantly. Therefore the knowledges about the erosion behavior of the coatings are necessarily to use the coatings. For that reason, you have to know the parameter of blasting wear and their influence on the removing behavior of the coating or of the blade material and you have to transpose the knowledges in a practical blasting wear test. This work gives a survey about the conception of a blasting wear test procedure. The important mechanism and the influencing variables on blasting wear will be explained, the new developed test procedure will be presented, and at least it will reported about the results of erosion tests at anticorrosion coatings (inorganically bound aluminium coatings) and thermal barrier coatings (yttrium partially stabilized zirconium oxide).
    Notes: Die Beschichtungen für Verdichter- und Gasturbinenschaufeln- wie Korrosionsschutzüberzüge oder Wärmedämmschichten - werden vielfach durch eine zusätzliche erosive Beaufschlagung geschädigt. Da die Hauptaufgabe der Beschichtungen nicht der Erosionsschutz, sondern der Korrosionsschutz bzw. die Wärmedämmung darstellt, sind sie in ihrem Erosionsverhalten meist schlechter als der jeweilige Schaufelwerkstoff. Die eigentliche Schutzwirkung der Beschichtungen wird dadurch erheblich eingeschränkt. Für einen gezielten Einsatz von Beschichtungen sind somit Kenntnisse über deren Erosionsverhalten notwendig. Deshalb bedarf es, die Strahlverschleißparameter und deren Einfluß auf das Abtragsverhalten einer Beschichtung bzw. eines Werkstoffes zu kennen und dieses Wissen in ein praxisgerechtes. Verschleißprüfverfahren umzusetzen. Diese Arbeit gibt einen Überblick von der Konzeption eines Strahlverschleiß-Prüfverfahrens. Dabei werden die wichtigen Mechanismen und Einflußgrößen des Strahlverschleißes sowie das entwickelte Prüfverfahren vorgestellt, und anschließend werden die Ergebnisse der Strahlverschleißuntersuchungen an Korrosionsschutzüberzügen (anorganisch gebundene Aluminium-Überzüge) und an Wärmedämmschichten (Yttrium-teilstabilisierte Zirkonoxid-Schichten) erläutert.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19900411105
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