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.
|Title of host publication||ADVANCED MATERIALS FORUM V, PT 1 AND 2. Book Series: Materials Science Forum|
|Publication status||Published - 1 Jan 2010|
|Event||5th International Materials Symposium/14th Conference of the Sociedade Portuguesa de Materiais - Lisbon, Portugal|
Duration: 5 Apr 2009 → 8 Apr 2009
|Conference||5th International Materials Symposium/14th Conference of the Sociedade Portuguesa de Materiais|
|Period||5/04/09 → 8/04/09|