© 2015, Universidade Federal do Rio de Janeiro. All rights reserved. Research by this working group's takes as a principal aim the study and manufacture of bulk metal glass based copper (Cu-Ni-Zr) by mechanical alloying. First, the characterization of the milled pure copper, Cu-Ni and Cu-Zr binary alloys and Cu-Ni-Zr ternary alloys in the same conditions of high energy millings. In this work, the microstructural change of Nickel to be subjected to high energy milling is presented. For this purpose a SPEX 8000D mill with the following conditions of milling: argon, stearic acid, BPR = 10:1, with milling time from 1 to 60 hours, 1 h of effective milling followed by a rest period of 0,5 h. Subsequent to the milling samples were analyzed by ray-X diffraction, transmission electron microscopy and atomic absorption spectroscopy, obtaining the crystallite size, lattice parameters and Fe contamination. The results show that nickel when subjected to mechanical milling reaches a crystallite size of about 10 nm which is asymptotic from 5 h; the lattice parameter increases with increasing milling time, possibly due to increased interfacial component together with the incorporation of Fe, due to the high percentage contamination at 60 h.
Martínez, C., Rojas, P., Aguilar, C., Guzmán, D., & Zelaya, E. (2015). Study of Ni microstructural changes when subjected to high energy milling. Revista Materia, 621-626. https://doi.org/10.1590/S1517-707620150003.0063