Manufacturing of biomedical Ti alloys with controlled oxygen content by blended elemental powder metallurgy

0569761 - ÚT 2023 RIV NL eng J - Journal Article
Kozlík, J. - Preisler, D. - Stráský, J. - Kosutová, T. - Correa, C.A. - Veselý, J. - Bodnárová, Lucie - Lukáč, František - Chráska, Tomáš - Janeček, M.
Manufacturing of biomedical Ti alloys with controlled oxygen content by blended elemental powder metallurgy.
Journal of Alloys and Compounds. Roč. 905, June (2022), č. článku 164259. ISSN 0925-8388. E-ISSN 1873-4669
R&D Projects: GA ČR(CZ) GA19-11275S
Institutional support: RVO:61388998 ; RVO:61389021
Keywords : biocompatible * titanium * blended elemental powder metallurgy * field-assisted sintering technique (FAST)
OECD category: Materials engineering; Materials engineering (UFP-V)
Impact factor: 6.2, year: 2022
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0925838822006508

Biomedical Ti-xNb-7Zr-0.7O (wt%) alloys were manufactured from elemental powders and controlled ad-dition of TiO2 using field assisted sintering technique (FAST). First, sintering parameters were optimized on the benchmark Ti-29Nb-7Zr-0.7O alloy. Second, alloys with various content of Nb (20, 23, 26 and 29 wt%) were manufactured. FAST is capable to produce homogeneous material with controlled amount of oxygen. In addition, FAST is a valuable method for fast sampling of alloys with different compositions. Detailed XRD and SEM study proved that oxygen prevents formation of alpha martensite phase. Presence of alpha phase, alpha' phase and especially omega phase causes an increase of elastic modulus and microhardness. Single phase beta Ti-29Nb-7Zr-0.7O alloy can be manufactured by FAST from elemental powders and subsequent solution treatment. The alloy is proposed for biomedical use due to its low elastic modulus.
Permanent Link: https://hdl.handle.net/11104/0341121