Influence of the Mn content on the TiNbxMn alloys with a novel fcc structure

E. Chicardi, C. Aguilar, M. J. Sayagués, C. García-Garrido

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© 2018 Elsevier B.V. This work studies the structural evolution of TiNbxMn alloys (x: 0–12 wt%) synthetized by mechanical alloying in a planetary ball mill with different milling times between 1 h and 120 h. The specimens were characterized by X-ray diffraction patterns, scanning and transmission electron microscopies and Energy-dispersive X-ray spectroscopy. It was observed an evolution of the alloys developed from the raw Ti, Nb and Mn elements to bcc-TiNbxMn alloys and, finally, novel fcc-TiNbxMn alloys, with Fm3m space group symmetry, not previously observed. The presence of Mn promotes other interesting effects: a) the decreasing of the crystallite and the particle sizes, reaching values close to 4 nm and 400 nm, respectively, b) the partial amorphization of the fcc-TiNbxMn alloys due to the combined effect of the Mechanical Alloying and the difference of Mn atomic size in comparison with Ti and Nb and c) the presence of Mn that decreases the Fe amount (from milling media) in the as-milled powders.
Original languageEnglish
Pages (from-to)601-610
Number of pages10
JournalJournal of Alloys and Compounds
Publication statusPublished - 25 May 2018

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