Abstract
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.
Highlights
INTRODUCCIÓNEl proceso de molienda mecánica produce notables cambios microestructurales y morfológicos, debido a la
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
The microstructural change of Nickel to be subjected to high energy milling is presented
Summary
El proceso de molienda mecánica produce notables cambios microestructurales y morfológicos, debido a la. Existen distintos métodos de fabricación de Níquel nanoestructurado que consisten en electrodeposición [6], métodos químicos [7], molienda de alta energía [8], etc. Mediante el proceso de molienda de alta energía se pueden obtener metales, intermetálicos [9, 10], compósitos y cerámicos con un tamaño de grano del orden de los nanómetros [11]. Que en este trabajo se estudian los cambios microestructurales del Ni bajo molienda mecánica de alta energía, considerando las múltiples aplicaciones del Ni a escala nanométrica, y que, el conocer las transformaciones de no-equilibrio que le ocurren a los polvos elementales cuando son sometidos a molienda mecánica es una valiosa herramienta para comprender los mecanismos de formación de aleaciones binarias (Cu-Ni) y aleaciones ternarias de Cu-Ni-Zr
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