Thermal analysis and morphology of the ball-milled Ti-Ni powder

Thermal analysis and morphology of the ball-milled Ti-Ni powder

The initially spherical titanium (Ti) powder particles were flattened to ‘pan-cake” shape during Ball milling (BM) of the Ti-Ni powder mixture. Ultrafine Ni particles coated the pancakes of Ti particles after the final milling process of 8 h (h). The XRD patterns of the milled TiNi powders did not s...

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Bibliographic Details
Published in:Materials today : proceedings Vol. 38; pp. 503 - 507
Main Authors: Bolokang, A.S., Mathabathe, M.N., Mathebula, C., Machio, C.N.
Format: Journal Article
Language:English
Published: Elsevier Ltd 2021
Subjects:
Ball milling
Phase transformation
Thermal analysis
TiNi
Ball milling
Phase transformation
Thermal analysis
TiNi
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Summary:The initially spherical titanium (Ti) powder particles were flattened to ‘pan-cake” shape during Ball milling (BM) of the Ti-Ni powder mixture. Ultrafine Ni particles coated the pancakes of Ti particles after the final milling process of 8 h (h). The XRD patterns of the milled TiNi powders did not show obvious alloying. However, analysis of the (1 1 1) planes revealed a slight shifting on peak positioning which is attributable to powder deformation. Thermal analysis of unmilled Ti50Ni powder exposed the Ni Curie point at ∼353 °C. The normal α → β phase transformation in CP Ti was suppressed due to the presence of Ni powder. Differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to characterize the milled and annealed powders.
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2020.02.351