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.com
Volume 9
Journal of Biotechnology & Biomaterials
ISSN: 2155-952X
Biomaterials 2019
February 25-26, 2019
February 25-26, 2019 | London, UK
4
th
Annual Conference and Expo on
Biomaterials
Tribocorrosion behavior of Ti-10Nb alloy for biomaterial applications
Aline R Luz
1
, Carlos M Lepienski
2
, Carlos R Grandini
3
and
Neide K Kuromoto
1
1
Universidade Federal do Paraná, Brazil
2
Universidade Tecnológica Federal do Paraná, Brazil
3
Universidade Estadual Paulista, Campus de Bauru, Brazil
T
i and Ti6Al4V alloy are widely used to replace hard tissues due to their higher biocompatibility, corrosion resistance and
suitable mechanical properties. There is a concernment about the long-term release of harmful ions, as aluminum and
vanadium by dissolution from the Ti6Al4V alloy. These metals have a poor wear performance, and higher coefficient of friction
that restrict to the applications in the biomedical area. Besides, wear debris can result in inflammatory reactions that cause pain
and the loss of implants by osteolysis. In order to replace these materials, new beta alloys composed by non-toxic elements,
as Nb, Ta, Mo, have been proposed, which are corrosion resistant and have mechanical properties suitable for biomaterials
applications. After implantation into bone, implants can be exposed to tribocorrosion conditions, i.e., process combined of
corrosion and wear. However, research about the tribocorrosion behavior of new beta Ti alloys is still very limited. In this study,
tribocorrosion properties pure Ti and Ti-10Nb alloy for biomedical applications in phosphate-buffered saline solution were
investigated. The tests were done by reciprocating tribometer against Al2O3 ball, electrochemical tests and scanning electron
microscope images. The results, during the sliding, of open circuit potential demonstrated that the Ti-10Nb alloy was more
resistance to corrosion than pure Ti.The coefficients of friction obtainedwere 0.48 and 0.57 to Ti-10Nb alloy and Ti, respectively.
These metals showed a similar wear rate (~0.66 10
-3
mm
3
/Nm). The images of worn tracks revealed abrasive, adhesive and
oxidative wear for all samples. The results disclosed that the coefficient of friction was influenced through microstructure of Ti-
10Nb alloy. Neither mechanics of wear nor wear rate were dependent on the material microstructure. Therefore, in comparing
to pure Ti, the addition of beta stabilizer element in the Ti-10Nb alloy improves the corrosion resistance and the coefficient of
friction.
arossettoluz@gmail.comJ Biotechnol Biomater 2019, Volume 9
DOI: 10.4172/2155-952X-C1-113