Počet záznamů: 1  

Microstructure characterization of rapidly solidified Al-Fe-Cr-Ce alloy by positron annihilation spectroscopy

  1. 1. 0437336 - FZU-D 2015 RIV NL eng J - Článek v odborném periodiku
    Michalcová, A. - Vojtěch, D. - Čízek, J. - Procházka, I. - Drahokoupil, Jan - Novák, P.
    Microstructure characterization of rapidly solidified Al-Fe-Cr-Ce alloy by positron annihilation spectroscopy.
    Journal of Alloys and Compounds. Roč. 509, č. 7 (2011), s. 3211-3218 ISSN 0925-8388
    Výzkumný záměr: CEZ:AV0Z10100520
    Klíčová slova: metals and alloys * nanostructured materials * rapid solidification * positron spectroscopies * transmission electron microscopy * x-ray diffraction
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 2.289, rok: 2011

    Positron annihilation spectroscopy was employed for the microstructure characterization of rapidly solidified Al-3 wt.% Cr-3 wt.% Fe-0.8 wt.% Ce alloy prepared by melt spinning. Results of the positron annihilation study are analyzed within the diffusion trapping model and compared with results of X-ray diffraction, transmission electron microscopy and microhardness measurements. A good consistency among all experimental techniques was obtained. The rapidly solidified alloy exhibits ultra fine grained structure, consisting of cells separated by dislocation walls. Annealed samples showed no significant changes in structure up to 400 degrees C which proves good thermal stability of ultra fine grained structure. Exposure of the sample to temperature of 500 degrees C caused significant changes in the material.
    Trvalý link: http://hdl.handle.net/11104/0240894