Effect of the milling time on thermal stability of mechanically alloyed Mg50Ni50 amorphous alloy

Authors

  • D. Guzmán Departamento de Metalurgia, Facultad Ingeniería, Universidad de Atacama y Centro Regional de Investigación y Desarrollo Sustentable de Atacama
  • S. Ordoñez Departamento de Ingeniería Metalúrgica, Facultad de Ingeniería, Universidad de Santiago de Chile
  • D. Serafini Departamento de Física, Facultad de Ciencias, Universidad de Santiago de Chile and Center for Interdisciplinary Research in Materials
  • P. Rojas Escuela de Ingeniería Mecánica, Facultad de Ingeniería
  • C. Aguilar Instituto de Materiales y Procesos Termomecánicos, Facultad de Ciencias de la Ingeniería, Universidad Austral de Chile
  • M. Santander Departamento de Metalurgia, Facultad Ingeniería, Universidad de Atacama y Centro Regional de Investigación y Desarrollo Sustentable de Atacama
  • L. Navea Departamento de Metalurgia, Facultad Ingeniería, Universidad de Atacama y Centro Regional de Investigación y Desarrollo Sustentable de Atacama

DOI:

https://doi.org/10.3989/revmetalm.0853

Keywords:

Amorphous, Mechanical alloying, Thermal stability, Hydrogen storage materials, X-ray diffraction

Abstract


In order to study the relationship between the milling time used in the production of Mg50Ni50 amorphous alloy and its thermal stability, seven amorphous alloys were produced by milling for 20, 25, 30, 35, 40, 50 and 60 h each sample. The obtained powders were morphological and structurally characterized by scanning electron microscopy (SEM), Xray diffraction (XRD) and transmission electron microscopy (TEM), respectively. The thermal stability of amorphous alloys was study by differential scanning calorimetry (DSC). Based on the obtained results, it can be concluded that the increase in the added energy when milling for longer time causes the homogenization of the microstructure with an increase in amorphous phase, which dissolves a larger amount of nickel in its structure. Therefore, the simultaneous crystallization of the Mg2Ni and MgNi2 intermetallic compounds at 345 °C can be explained.

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Published

2009-10-30

How to Cite

Guzmán, D., Ordoñez, S., Serafini, D., Rojas, P., Aguilar, C., Santander, M., & Navea, L. (2009). Effect of the milling time on thermal stability of mechanically alloyed Mg50Ni50 amorphous alloy. Revista De Metalurgia, 45(5), 375–383. https://doi.org/10.3989/revmetalm.0853

Issue

Vol. 45 No. 5 (2009)

Section

Articles

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