Phase transformations and microstructural evolution of nanocrystalline Ti-18Zr-5Nb-3Sn-4Ta powders through mechanical alloying

摘要

The aims of the present study are to determine the possibility of obtaining a new, nanocrystalline Ti-18Zr-5Nb-3Sn-4Ta at.-% alloy by a ball milling method, and to observe the influence of various milling times on phase composition and structure of the obtained material. The X-ray diffraction results confirmed the alloy synthesis and revealed the presence of a- and β-Ti phases. The Rietveld refinement showed that the production method and the atomic radii of the elements used in the mechanical synthesis have influence on the structure. Scanning electron microscopy observation leads to the conclusion that the powder particles and the degree of aggregation change with increasing milling time.