Supersaturated solid solutions and metastable phases formation through different stages of mechanical alloying of FeTi |
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| Affiliation: | 1. Moscow State University, Department of Physics, 117234, Moscow, Russia;2. Institute for New Chemical Problems RAS, 142439, Chemogolovka, Russia;1. Institute of Chemistry, Eötvös Loránd University, Budapest, Hungary;2. Institute of Physics, University of Brasília, Brasília DF, Brazil;3. Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, HAS, Budapest, Hungary;1. Department of Experimental Physics, Faculty of Science, Palacky University, 17. listopadu 1192/12, 77 146 Olomouc, Czech Republic;2. Regional Centre of Advanced Technologies and Materials, Department of Experimental Physics, Faculty of Science, Palacky University, 17. listopadu 12, 77 146 Olomouc, Czech Republic |
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| Abstract: | Elemental equiatomic Fe-Ti powder mixture was mechanically alloyed in high energy ball mill. XRD, DTA and Mössbauer spectroscopy (at liquid nitrogen temperature) were utilized to monitor the kinetics as well as the accompanied structural and phase transformations through different stages of milling. Our experiments showed that formation of nanocrystalline FeTi compound proceeds via the formation of the supersaturated solid solutions β-Ti(Fe) and α-Fe(Ti) at the interface. After 36 hours of milling, the main part of powder mixture transformed not only to FeTi but also to Fe2Ti intermetallic compound. The transition of last part of super saturated solid solutions β-Ti(Fe) to those intermetallic phases was observed after annealing of this sample at 600 °C. |
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