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MM: Fachverband Metall- und Materialphysik

MM 22: Poster session I

MM 22.39: Poster

Montag, 20. März 2017, 19:00–20:00, P4

Mechanical alloying of Ti-25Ta for biomedical applications: Effect of milling parameters — •yanfei Sui¹, Mariana Calin¹, Sergio Scudino¹, Chunming Zou², Zunjie Wei², and Jürgen Eckert³ — ¹IFW Dresden, Institute for Complex Materials, 01171 Dresden, Germany — ²National Key Laboratory for Precision Heat Processing of Metal, Harbin Institute of Technology, Harbin 150001, China — ³Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, A-8700 Leoben, Austria

The influence of milling parameters, such as milling time (10h-80h), milling speed (200rpm, 250rpm, 300rpm), as well as the initial powder morphology, have been investigated. The microstructure of the milled powder has been characterized by scanning electron microscopy, coupled with X-ray diffraction. The results indicate that, the interval milling mode that carried out with a speed of 250rpm, shows optimized mechanical alloying effect. At the initial stages of ball milling a significant broadening of the diffraction peaks was observed, which can be linked to phason strain of the quasilattice. With increasing milling time, the diffraction signals belonging to β phase were no longer observed, indicating a complete transformation of β phase to α phase. The milled powder can be further used to synthesize compacts with a low elastic modulus for biomedical applications.