Corrosion and mechanical properties of a novel biomedical WN43 magnesium alloy prepared by spark plasma sintering

0543967 - ÚJF 2022 RIV CN eng J - Článek v odborném periodiku
Knapek, Michal - Zemková, M. - Greš, A. - Jablonská, E. - Lukáč, František - Král, R. - Bohlen, J. - Minárik, P.
Corrosion and mechanical properties of a novel biomedical WN43 magnesium alloy prepared by spark plasma sintering.
Journal of Magnesium and Alloys. Roč. 9, č. 3 (2021), s. 853-865. ISSN 2213-9567. E-ISSN 2213-9567
Grant CEP: GA MŠMT EF16_013/0001794
Institucionální podpora: RVO:61389021 ; RVO:61389005
Klíčová slova: Magnesium * Biocompatibility * Powder * Sintering * Corrosion * Rare Earth element
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.); Materials engineering (UFP-V)
Impakt faktor: 11.862, rok: 2021
Způsob publikování: Open access
https://doi.org/10.1016/j.jma.2020.12.017

Alloying of Mg with rare-earth (RE) elements proved to be beneficial for their in-vitro and in-vivo performance. In this work, a novel WN43 (Mg-4 wt%Y-3 wt%Nd) alloy with a well-defined composition was prepared, where, unlike in the commercial WE43 alloy, the possibly harmful RE mischmetal was substituted by less toxic Nd. A modern spark plasma sintering (SPS) technique was used to effectively produce WN43 samples from atomized powders. Sintering temperatures of 400 degrees C - 550 degrees C and holding times of 3 or 10 min were used and well-compacted final materials were successfully prepared. It was shown that a superior combination of corrosion and mechanical properties was attained in the samples sintered at 500 degrees C and 550 degrees C, while the effect of sintering time was rather negligible. The performance of this material was exceptional within the group of Mg alloys prepared by powder metallurgy and comparable with conventionally prepared alloys. Moreover, it was shown that a great variety of mechanical and corrosion characteristics can be obtained by altering the SPS parameters so as to fulfill case-specific requirements typical of biomedical materials. Consequently, the novel WN43 alloy prepared by SPS seems to be a particularly suitable material for biomedical use.
Trvalý link: http://hdl.handle.net/11104/0321054