Synthesis of porous Ti–50Ta alloy by powder metallurgy

Journal Article · Wed Aug 15 04:00:00 EDT 2018 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2018.05.033· OSTI ID:22805076

Dercz, Grzegorz; Izabela, Matula; Zubko, Maciej ^[1]; Alicja, Kazek-Kesik ^[2]; Maszybrocka, Joanna ^[1]; Simka, Wojciech ^[2]; Dercz, Jolanta ^[3]; Paweł, Swiec ^[1]; Jendrzejewska, Izabela

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1. Institute of Materials Science, University of Silesia in Katowice, 75 Pułku Piechoty Street 1 A, 41-500 Chorzów (Poland)
2. Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego Street 6, 44-100 Gliwice (Poland)
3. Institute of Technology and Mechatronics, University of Silesia, Śnieżna 2, 41-200 Sosnowiec (Poland)

Highlights: • The proposed preview milling with the next sintering enables the homogeneous porous Ti50Ta (wt).% alloy to be obtained • The α and β nanocrystalline phases were prepared by ball milling. • For the longest sintering time there is complete diffusion of preview milled initial powders • The press and sinter route is proved to be a promising alternative for melted Ti-based biomaterials. - Abstract: The aim of the present study was to assess the possibility of producing porous Ti50Ta (wt%) alloys using powder metallurgy by characterizing the material properties. The influence of the sintering time on the microstructure, mechanical properties, and corrosion behaviour of the produced alloy was investigated. The samples were examined using scanning electron microscopy (SEM), transmission electron microscopy (TEM), optic microscopy, X-ray diffraction (XRD) and nanoindentation methods. The XRD results confirmed that nanocrystalline α and β phases were formed during high-energy ball milling. A longer sintering time of 72 h allowed complete interdiffusion of the elements in the pre-milled initial powders. The sintering time significantly influenced the microstructure and porosity. Additionally, the corrosion resistance of the Ti-Ta samples in Ringer's solution was characterized and differences were observed between the samples sintered at different temperatures. The open-circuit potential (E{sub OCP}) and the corrosion potential (E{sub CORR}) of all samples were similar. The sintered Ti50Ta (wt%) alloy showed better corrosion resistance than equivalent Ti or Ta reference samples. We concluded that these alloys had suitable properties for medical implant applications in the future.

• OSTI ID: 22805076
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Vol. 142; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
BINARY ALLOY SYSTEMS
CORROSION RESISTANCE
CRYSTALS
DIFFUSION
IMPLANTS
MICROSTRUCTURE
NANOSTRUCTURES
POROSITY
POROUS MATERIALS
POWDER METALLURGY
PRESSES
SCANNING ELECTRON MICROSCOPY
SINTERING
TANTALUM COMPOUNDS
TITANIUM COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION