Paper Title:
Effect of Mechanical Activation on Ti-50Ni Powder Blends Reactivity
  Abstract

In the present study, equiatomic powder blends of Ni and Ti were mechanically activated for a short period of time in a planetary ball mill using different levels of energy input. The characterization of the mechanically activated materials was achieved by scanning electron microscopy, X-ray diffraction, differential thermal analysis and chemical analysis (oxygen and nitrogen measurements). During mechanical activation no phase transformation was induced and the high temperature reaction between Ni and Ti elemental powders was shifted to lower temperatures. Moreover, the temperature and the intensity of the exothermic reaction, i.e. the reactivity observed in the powder blends, decreased with the increase in the level of milling energy input. A maximum oxygen content of 0.39 wt% was measured after mechanical activation.

  Info
Periodical
Materials Science Forum (Volumes 636-637)
Edited by
Luís Guerra ROSA and Fernanda MARGARIDO
Pages
544-549
DOI
10.4028/www.scientific.net/MSF.636-637.544
Citation
F. Neves, F. M. Braz Fernandes, J. B. Correia, "Effect of Mechanical Activation on Ti-50Ni Powder Blends Reactivity", Materials Science Forum, Vols. 636-637, pp. 544-549, 2010
Online since
January 2010
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Price
$32.00
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