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  • Chemistry  (2)
  • method “integral layer profile analysis” with EDX-/WDX-systems  (1)
  • 1
    Electronic Resource
    Electronic Resource
    High temperature corrosion behaviour of M(Co, Ni)CrAIY-coatings on high temperature materials-microanalytical investigations (1987)
    Springer
    Microchimica acta 91 (1987), S. 49-70 
    Details
    ISSN: 1436-5073
    Keywords: high temperature corrosion ; coatings ; laboratory and operation tests ; method “integral layer profile analysis” with EDX-/WDX-systems ; materials characterization up to 900° C
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In our former investigations, the phenomenon high temperature corrosion (HTC) was described exemplarily on selected materialcoating combinations for blades of stationary gas turbines, mainly in the temperature region of up to 750° C. To answer the question, in which manner higher gas inlet and/or higher material surface temperature would influence the HTC behaviour, a special analytical technique—the “integral layer profile analysis”—was introduced to ameliorate concentration profile methods. By examining IN 738 LC specimens with CoCrAlY plasma spray coating, stressed by hot gas at 900° C, the limits of this system are shown by explaining the corrosion mechanism; the method is also used for other systems, e.g. U 520 with NiCrAlY coating at 750° C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01199479
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  • 2
    Electronic Resource
    Electronic Resource
    High Temperature Corrosion on high temperature materials - Metallographic, scanning electron microscopic and microanalytical tests (1982)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 13 (1982), S. 338-347 
    Details
    ISSN: 0933-5137
    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: Hochtemperaturkorrosion an Hochtemperatur-WerkstoffenHochtemperaturkorrosion - die oxidative Schädigung von metallischen Werkstoffen durch heiße Gase sowie andere flüssige und feste Stoffe - verkürzt die Lebensdauer von Gasturbinen. Durch Vergleich der Resultate von Laborversuchen unter definierten Bedingungen mit den Ergebnissen des praktischen Betriebes sollen die Schadensmechanismen geklärt werden.Metallographische Untersuchungen, die Klärung des Schadensablaufs in Mikrobereichen und beeinflussen die Werkstoffauswahl und deren Schutzgebung (Aufbringen von Schutzschichten) mit dem Ziel der Steigerung der Wirtschaftlichkeit der Anlage.
    Notes: High temperature corrosion - oxidative damage of metallic materials from hot gas and other fluid and solid components - shortens the life of gas turbines. By comparing the results of laboratory tests under constant conditions with the results of the operation of gas turbines the facts of failure should be clarified.Metallographie examinations, but especially SEM, Microprobe and AES help to clear the facts of failures in the microscopic zones. These tests will help when selecting materials and their protective coatings with the purpose of higher rentability of the plant.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19820131004
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  • 3
    Electronic Resource
    Electronic Resource
    Synthese des (±)-„Isoalbens“ (1979)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 397-407 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of (±)-“Isoalbene”In an attempt to synthesize the natural compound „albene“ it was shown that this material does not possess structure 1. Actually 1 is produced via the Diels-Alder adduct 10, followed by hydrogenation to 11 and Thorpe-Ziegler ring closure of the third carbocyclic ring by means of dinitrile 19. The resulting symmetrical ketone 3 is transformed into the thioenolether 21 with phenylmethanthiol. Desulfurization with Raney nickel yields 2.6-dimethyl-endo-tricyclo[5.2.1.02,6]dec-3-ene (1). which is not identical with natural „albene“.
    Notes: Bei dem Versuch einer Totalsynthese des Naturstoffs „Alben“ zeigte sich, daß diesem nicht die Strukturformel 1 zukommen kann. Die Darstellung von 1 erfolgte auf dem Wege über das Diels-Alder-Addukt 10, Hydrierung zu 11 und Schließen des dritten carbocyclischen Ringes mit Hilfe des Dinitrils 19 und Thorpe-Ziegler-Verfahrensweise. Das solcherart zugängliche symmetrische Keton 3 ließ sich mit Phenylmethanthiol in den Thioenolether 21 überführen. Entschwefelung mit Raney-Nickel ergab 2,6-Dimethyl-endo-tricyclo[5.2.1.0:2,6]dec-3-en (l), das mit natürlichem „Alben“ nicht übereinstimmte.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19791120202
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