Počet záznamů: 1

High temperature stability of Cr-carbides in an experimental Co Re-based alloy

  1. 1.
    0346618 - UJF-V 2011 RIV DE eng J - Článek v odborném periodiku
    Mukherji, D. - Klauke, M. - Strunz, Pavel - Zizak, I. - Schumacher, G. - Wiedenmann, A. - Rösler, J.
    High temperature stability of Cr-carbides in an experimental Co Re-based alloy.
    International Journal of Materials Research. Roč. 101, č. 3 (2010), s. 340-348 ISSN 1862-5282
    Výzkumný záměr: CEZ:AV0Z10480505
    Klíčová slova: Co-Re base alloy * Cr-carbide stability * Electron microscopy
    Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
    Impakt faktor: 0.860, rok: 2010

    The stability of the microstructure at high temperatures was studied in an experimental Co Re-based alloy. The experimental alloy is mainly strengthened by Cr-carbides, particularly by those in the form of thin lamellar plates. Electron microscopic investigation on samples exposed for up to 1000 h to temperatures of 1000 and 1200 degrees C showed that Cr23C6 type carbides present in the alloy in different morphologies are unstable at these temperatures. It was also observed that the alloy hardness dropped after exposing the samples to elevated temperatures and much of this loss occurred within the first 100 h. In-situ diffraction measurements with synchrotron radiation showed that carbide dissolution started as early as 3 11 of holding at 1000 degrees C. Moreover, in-situ small angle neutron scattering results indicated that the carbides at the grain boundaries and the blocky carbides dissolve first and then the thin lamellar carbides.
    Trvalý link: http://hdl.handle.net/11104/0187598