Hamburg 2001 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
AM: Magnetismus
AM 4: Nanokristalline Materialien
AM 4.7: Vortrag
Montag, 26. März 2001, 16:15–16:30, S 5.4
Phase Transformations in the Fe-Mn System induced by Ball Milling — •Michael Uhrmacher1, Agnieska Kulinska1,2, Victor V. Tcherdyntsev3, S.D. Kaloshkin3, A. Maddalena4, Gianni Principi4, and Yu.V. Baldokhin5 — 1Universität Göttingen, II. Physikalisches Institut, Bunsenstrasse 7/9, D-37073 Göttingen — 2Henryk Niewodniczanski Institut of Nuclear Physics, Krakow, Poland — 3Dep. of Physical Chemistry, Moscow State Steel and Alloys Institut, Leninsky prosp. 4, 117936 Moscow, Russia — 4Univ.di Padova, INFM, Settore Materiali, via Marzolo 9, 35131 Padova, Italy — 5Semenov Inst. of Physical Chemistry, Russian Academy of Sciences, Kosygina str. 4, Moscow, Russia
High energy ball milling of Fe-Mn elemental powder mixtures has been carried out for different Mn concentrations, ranging from 0% to 90%. X-ray diffraction (XRD), Mössbauer spectroscopy 57Fe (MS) and perturbed angular correlation (PAC) with 111In probes, implanted at 400 keV into pills made from the milled powders, have been used to investigate the structure of the milled samples. Clear changes of the PAC-patterns occur at a Mn-concentration of 15 - 20% and above 70%. The results of PAC and MS are compared. It is found that ball milling gives rise to concentration ranges of terminal solid solutions more extended than in the equilibrium phase diagram.