Tribological behavior of bioactive multi-material structures targeting orthopedic applications

Costa, M.M.; Bartolomeu, F.; Alves, N.; Silva, F.S.; Miranda, G.

http://hdl.handle.net/10400.8/8550

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Abstract(s)

The following study proposes a multi-material solution in which Ti6Al4V cellular structures produced by Selective Laser Melting are impregnated with bioactive materials (hydroxyapatite or β-tricalcium phosphate) using press and sintering technique. To assess the tribological response of these structures, an alumina plate was used as a counterpart in a flat-on-flat reciprocating sliding test. Ti6Al4V cellular structures impregnated with bioactive materials displayed the highest wear resistance when compared with the unreinforced structures. Among the bioactive structures, Ti6Al4V cellular structures impregnated with βTCP were the ones with higher wear resistance, having the lowest weight loss. Hence, these structures are promising multifunctional solutions for load-bearing applications by gathering suitable mechanical properties (strength and stiffness); bioactive properties and in addition an improved wear performance.

Description

Acknowledgments This work was supported by Fundação para a Ciência e Tecnologia (FCT), Portugal through the grants SFRH/BD/140191/2018, SFRH/BD/ 128657/2017 and SFRH/BPD/112111/2015, the project PTDC/EMSTEC/ 5422/2014 and also by project NORTE 01-0145_FEDER-000018. Additionally, this work is supported by FCT with the reference project UID/EEA/04436/2019.

Keywords

Multi-material structures Ti6Al4V Hydroxyapatite β-tricalcium phosphate Selective Laser Melting Press and sintering

URI

http://hdl.handle.net/10400.8/8550

Citation

M.M. Costa, F. Bartolomeu, N. Alves, F.S. Silva, G. Miranda, Tribological behavior of bioactive multi-material structures targeting orthopedic applications, Journal of the Mechanical Behavior of Biomedical Materials, Volume 94, 2019, Pages 193-200, ISSN 1751-6161, https://doi.org/10.1016/j.jmbbm.2019.02.028.