Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7992756 | Journal of Alloys and Compounds | 2018 | 37 Pages |
Abstract
This work studies the structural evolution of TiNbxMn alloys (x: 0-12â¯wt%) synthetized by mechanical alloying in a planetary ball mill with different milling times between 1â¯h and 120â¯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 4â¯nm and 400â¯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.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
E. Chicardi, C. Aguilar, M.J. Sayagués, C. GarcÃa-Garrido,