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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 35 (1984), S. 1-7 
    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: Untersuchung des Korrosionsverhaltens einer NiCrMo-Legierung in PNP Helium mittels Röntgendiffraktion und Elektronenstrahl-MikroanalyseProben der Nickelbasis-Legierung Nimonic 86 wurden in PNP-500-artigem Helium während 1000 h bei 650, 750, 850, 900 und 950°C ausgelagert. Röntgendiffraktion zeigte nach der Wämebehandlung 5 neu gebildete Phasen an den Probenoberflächen. Ihre Bestimmung ergab (1) einen Spinell Cr2MnO4 (für T ≤ 850°C), dessen Al- und Ti-Gehalt mit zunehmender Temperatur zunimmt, (2) ein Sesquioxid Cr2O3 (für T 〉 900°C) mit einem beträchtlichen Mn-Gehalt für T ≤ 850°C, (3) ein ≠1 Oxid Ni2Mo3O (hauptsächlich bei 750°C) mit geringem Fe-Gehalt, (4) ein ≠1 Karbid (Ni, Cr, Si)3Mo3C (für T ≤ 750°C), (5) Cr23C6(für T ≤ 850°C) mit etwas Mo.
    Notes: Samples of the nickel base alloy Nimonic 86 were exposed to PNP-500 type helium for 1000 h at 650, 750, 850, 900 and 950°C. X-ray diffraction showed 5 additional phases, formed at the sample surfaces during the heat treatment. They were shown to be: (1) a spinel Cr2MnO4 (at T ≤ 850°C) containing increasing amounts of Al and Ti with increasing temperature, (2) a sesquioxide Cr2O3 (at T ≥ 900°C) containing substantial amounts of Mn for T ≤ 850°C, (3) an ≠1 oxide Ni3Mo3SO (mainly at 750°C) containing some Fe, (4) an ≠1 carbide (Ni, Cr, Si)3Mo3C (at T ≤ 750°C), (5) Cr23C6 (at T ≤ 850°C) containing some Mo.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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