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Phase composition and microstructure of new Ti–Ta–Nb–Zr biomedical alloys prepared by mechanical alloying method

Published online by Cambridge University Press:  08 February 2017

G. Dercz ,
I. Matuła ,
M. Zubko  and
J. Dercz
G. Dercz*
Affiliation:
Institute of Materials Science, University of Silesia, 75 Pułku Piechoty Street 1 A, 41-500 Chorzów, Poland
I. Matuła
Affiliation:
Institute of Materials Science, University of Silesia, 75 Pułku Piechoty Street 1 A, 41-500 Chorzów, Poland
M. Zubko
Affiliation:
Institute of Materials Science, University of Silesia, 75 Pułku Piechoty Street 1 A, 41-500 Chorzów, Poland
J. Dercz
Affiliation:
Institute of Technology and Mechatronics, University of Silesia, Śnieżna 2, 41-200 Sosnowiec, Poland
*
a)Author to whom correspondence should be addressed. Electronic mail: [email protected]
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Abstract

The study presents the results of the influence of high-energy ball-milling time on the structure of the new β-type Ti–Ta–Nb–Zr alloys for biomedical applications. Initial elemental powders were mechanically alloyed in a planetary high-energy ball mill at different milling times (from 10 to 90 h). Observation of the powder morphology after various stages of milling leads to the conclusion that with the increase of the milling time the size of the powder particles as well as the degree of aggregation change. Clear tendency of crystalline size reduction at every stage of the grinding process is clearly observed. The X-ray diffraction results confirmed the formation of β phase during high-energy ball milling of the precursor mixture of Ti, Ta, Nb, and Zr. The Rietveld refinement method has shown that both the production method and the atomic radii of the elements used in the mechanical synthesis have influence on the structure. Furthermore, it was found that a broadening of the diffraction peaks with increase of the milling time results from an increase in the crystallites dispersion and an enlargement in the lattice distortion. The results indicate that this technique is a powerful and high productive process for preparing new β-titanium alloys with nanocrystalline structure and appropriate morphology.

Keywords

Rietveld methodnanocrystalline materialsTi–Ta–Nb–Zr alloysmechanical synthesis
Type
Technical Articles
Information
Powder Diffraction , Volume 32 , Supplement S1 , September 2017 , pp. S186 - S192
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Copyright
Copyright © International Centre for Diffraction Data 2017 

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