caa a22 4500 463228634 CHVBK 20180405153235.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1007/s10853-006-1425-5 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1425-5 Quasicrystal-crystal structural transformation in Al-5wt.% Mn alloy [Elektronische Daten] [Karel Saksl, Dalibor Vojtěch, Hermann Franz] The atomic structure of Al-5wt.%Mn (Al-5Mn) alloy, prepared by rapid solidification, and pre-annealed at 623 and 773K for 5 and 1h, respectively, were characterized by X-ray powder diffraction (XRD) and extended X-ray absorption fine structure (XAFS) techniques. The sample in as-quenched stage was found crystalline, consisting of metastable α-Al (Al-Mn solid solution) and icosahedral quasicrystalline I-Al6Mn phases. Five hours annealing at 623K proved thermal stability of both the phases. Pre-annealing at 773K/1h on the other hand leads to α-Al phase decomposition and structural transformation of metastable I-Al6Mn to stable orthorhombic Al6Mn phase. The EXAFS results indicate that Mn atoms are located preferably on the outer shell of icosahedrons. During the I-Al6Mn→o-Al6Mn transformation the total Al atoms coordinating one Mn were found to be constant (∼10). Based on the results, only distance/symmetry changes in atomic arrangement around Mn atoms were suggested. Springer Science+Business Media, LLC, 2007 Saksl Karel HASYLAB am Deutschen Elektronen Synchrotron, DESY, Notkestrasse 85, 22603, Hamburg, Germany aut Vojtěch Dalibor Department of Metals and Corrosion Engineering, Institute of Chemical Technology, Technická 5, 16628, Prague 6, Czech Republic aut Franz Hermann HASYLAB am Deutschen Elektronen Synchrotron, DESY, Notkestrasse 85, 22603, Hamburg, Germany aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/17(2007-09-01), 7198-7201 0022-2461 42:17<7198 2007 42 10853 https://doi.org/10.1007/s10853-006-1425-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1425-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Saksl Karel HASYLAB am Deutschen Elektronen Synchrotron, DESY, Notkestrasse 85, 22603, Hamburg, Germany aut NATIONALLICENCE 700 1- Vojtěch Dalibor Department of Metals and Corrosion Engineering, Institute of Chemical Technology, Technická 5, 16628, Prague 6, Czech Republic aut NATIONALLICENCE 700 1- Franz Hermann HASYLAB am Deutschen Elektronen Synchrotron, DESY, Notkestrasse 85, 22603, Hamburg, Germany aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/17(2007-09-01), 7198-7201 0022-2461 42:17<7198 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer