Microstructural characterization and thermodynamic analysis of MoZn produced by mechanical alloying

In this work, the microstructural evolution of MoZn during mechanical alloying (MA) was studied. The phases and morphology at each stage of milling were studied by X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy. The experimental results showed t...

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Bibliographic Details
Published in:Journal of alloys and compounds 2017-03, Vol.696, p.329-337
Main Authors: Rivera Olvera, Jesús Noé, Acevedo Martínez, Janete, Herrera Hernández, H., García Orozco, I., Díaz Barriga Arceo, L.
Format: Article
Language:English
Subjects:
High resolution
Mechanical alloying
Microstructure
Molybdenum
MoZn
Nanostructured materials
Thermodynamic analysis
Thermodynamics
Transmission electron microscopy
X-ray diffraction
Zinc
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Summary:In this work, the microstructural evolution of MoZn during mechanical alloying (MA) was studied. The phases and morphology at each stage of milling were studied by X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy. The experimental results showed that a MoZn solid solution was produced from a mixture of Mo and Zn powders with crystallite size of 36.2 nm after 100 h of milling. A thermodynamic analysis of the Mo-Zn system was performed using the Miedema model to study the stability of the MA product. The calculations revealed no thermodynamic driving force in the Mo-Zn binary to form a solid solution phase in all compositions, suggesting that external energy has to be provided to produce the Mo-Zn phase. [Display omitted] •Thermodynamics analysis of MoZn system was carried out.•A nanopowder MoZn solid solution was obtained by mechanical alloying.•After 100 h of MA, MoZn phase was produced with a crystallite size of 36.2 nm.•Microhardness properties was obtained for the MA powders.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2016.10.052