Atomic Ordering at Grain Boundaries in Fe-Si and Fe-Al Alloys

0178168 - UFM-A 20033191 RIV SIGLE NL eng C - Konferenční příspěvek (zahraniční konf.)
Schneeweiss, Oldřich - Jirásková, Yvonna - Čermák, Jiří - Lejček, Pavel
Atomic Ordering at Grain Boundaries in Fe-Si and Fe-Al Alloys.
Proceedings of the International Conference on the Applications of the Mössbauer Effect, (ICAME 2001). Dordrecht: Kluwer Academic Publishers, 2002 - (Thomas, M.; Williams, J.; Gibb, T.), s. 571-574. ISBN 1-4020-1087-7.
[International Conference on the Applications of the Mössbauer Effect, (ICAME 2001). Oxford (GB), 02.09.2001-07.09.2001]
Grant CEP: GA ČR GA106/99/0183; GA AV ČR KSK1010104
Výzkumný záměr: CEZ:AV0Z2041904
Klíčová slova: grain boundaries * atomic ordering * iron alloys
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

Atomic ordering at grain boundaries (GBs) in iron rich Fe-Si and Fe-Al alloys was studied using emission Mössbauer spectroscopy. The results on Fe-Si show differences in the chemical composition in grain interiors (GIs) and at GBs. An increase in Si concentration at GBs and atomic ordering corresponding to the D03 superstructure were found. GBs in Fe-Al samples exhibit more complicated phase and chemical composition. The components of the emission spectra can be interpreted as an inhomogeneous increase in Al concentration at GBs and a lower symmetry than the bcc lattice of GIs.
Trvalý link: http://hdl.handle.net/11104/0075057