Tribocorrosion behavior of bio-functionalized highly porous titanium

• Tipo: Artigo em Revista Científica Internacional
• Data: 2017

Autores

Toptan, F (Autor) Outra; Alves, AC (Autor) Outra; Pinto, AMP (Autor) Outra; Ponthiaux, P (Autor) Outra

Revista

Título: Journal of the Mechanical Behavior of Biomedical Materials

Vol. 69

Páginas: 144-152

ISSN: 1751-6161

Editora: Elsevier

Indexação

ISI Web of Knowledge - 9 Citações

Scopus - 43 Citações

Outras Informações

ID Authenticus: P-00M-SCP

DOI: 10.1016/j.jmbbm.2017.01.006

Abstract (EN): Titanium and its alloys are widely used in orthopedic and dental implants, however, some major clinical concerns such as poor wear resistance, lack of bioactivity, and bone resorption due to stress shielding are yet to be overcome. In order to improve these drawbacks, highly porous Ti samples having functionalized surfaces were developed by powder metallurgy with space holder technique followed by anodic treatment. Tribocorrosion tests were performed in 9 g/L NaCl solution using a unidirectional pin-on-disc tribometer under 3 N normal load, 1 Hz frequency and 4 mm track diameter. Open circuit potential (OCP) was measured before, during and after sliding. Worn surfaces investigated by field emission gun scanning electron microscope (FEG-SEM) equipped with energy dispersive X-ray spectroscopy (EDS). Results suggested bio-functionalized highly porous samples presented lower tendency to corrosion under sliding against zirconia pin, mainly due to the load carrying effect given by the hard protruded oxide surfaces formed by the anodic treatment.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9