Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/52386

TitleTribocorrosion behavior of veneering biomedical PEEK to Ti6Al4V structures
Author(s)Sampaio, Miguel Ângelo Guimarães
Buciumeanu, Mihaela
Henriques, Bruno
Silva, Filipe Samuel
Souza, J. C. M.
Gomes, J. R.
KeywordsBiotribology
Tribocorrosion
Ti6Al4V
PEEK
Sliding wear
Issue date2016
PublisherElsevier
JournalJournal of the Mechanical Behavior of Biomedical Materials
Abstract(s)In dentistry, prosthetic structures must be able to support masticatory loads combined with a high biocompatibility and wear resistance in the presence of a corrosive environment. In order to improve the simultaneous wear and corrosion response of highly biocompatible prosthetic structures, a veneering poly-ether-ether-ketone (PEEK) to Ti6Al4V substrate was assessed by tribocorrosion analyses under conditions mimicking the oral environment. Samples were synthesized by hot pressing the PEEK veneer onto Ti6Al4V cylinders. The tribocorrosion tests on Ti6Al4V or PEEK/Ti6Al4V samples were performed on a reciprocating ball-on-plate tribometer at 30 N normal load, 1 Hz and stroke length of 3 mm. The tests were carried out in artificial saliva at 37 ºC. Open circuit potential (OCP) was measured before, during and after reciprocating sliding tests. The worn surfaces were characterized by scanning electron microscopy. The results revealed a lower wear rate on PEEK combined with a lower coefficient of friction (COF), when compared to Ti6Al4V. In fact, PEEK protected Ti6Al4V substrate against the corrosive environment and wear avoiding the release of metallic ions to the surrounding environment.
TypeArticle
URIhttp://hdl.handle.net/1822/52386
DOI10.1016/j.jmbbm.2015.09.010
ISSN1751-6161
e-ISSN1878-0180
Publisher versionhttps://www.sciencedirect.com/science/article/pii/S175161611500346X
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:DEM - Artigos em revistas de circulação internacional com arbitragem científica

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