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Advances in Materials Science and Engineering
Volume 2017 (2017), Article ID 7967848, 12 pages
https://doi.org/10.1155/2017/7967848
Research Article

Synthesis and Characterization of Zn-Nix Advanced Alloys Prepared by Mechanical Milling and Sintering at Solid-State Process

1Universidad Autónoma del Estado de México, Centro Universitario UAEM Valle de México, Laboratorio de Investigación y Desarrollo de Materiales Industriales, 54500 Atizapán de Zaragoza, MEX, Mexico
2Tecnológico de Estudios Superiores de Ixtapaluca, 56580 Ixtapaluca, MEX, Mexico
3Centro de Investigación en Materiales Avanzados (CIMAV), Laboratorio Nacional de Nanotecnología, 31136 Chihuahua, CHIH, Mexico

Correspondence should be addressed to Héctor Herrera-Hernández

Received 2 July 2017; Revised 3 October 2017; Accepted 12 October 2017; Published 28 December 2017

Academic Editor: Andres Sotelo

Copyright © 2017 José G. Miranda-Hernández et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Mechanical ball milling assisted by sintering in the solid state was used in this research to produce the Zn-Nix system alloy. The derivative powder compositions of Zn-Nix (x = 0, 5, 10, 15, and 20 wt.%) were obtained to study the Ni effects on the microstructural and mechanical properties. It is worth remarking that conventional methods are not appropriate for the manufacture of the Zn-Nix system alloy. The morphological structure and phases were examined by optical microscopy, X-ray diffraction, and SEM/EDS elemental mapping, whereas the mechanical behavior was accomplished by means of a diamond indentation print (Hardness Vickers). The results showed that the intermetallic γ-ZnNi phase did not form during milling time (<4 h); it appears after the sintering process, which is associated with atomic diffusion mechanism through grain boundary at the minimum interfacial energy (ΔG256°C = −13.83 kJ·mol−1). The powder Zn-Ni10 was found to have better properties. Semispherical coarser particles were seen into the metal matrix (Zn δ-hcp structure) as segregates; however, each particle contains an intermetallic compound Zn-Ni that encloses the Ni (α-fcc structure) pure phase. The Ni-α phase was then transformed into a γ-ZnNi intermetallic compound which shifts to higher values of mechanical hardness from about 60 HV to 400 HV units.