Tribocorrosion-Resistant Ti40Nb-TiN Composites Having TiO 2 -Based Nanotubular Surfaces

• Published in: ACS biomaterials science & engineering Vol. 8; no. 5; pp. 1816 - 1828
• Main Authors: Çaha, Ihsan, Alves, Alexandra C, Chirico, Caterina, Pinto, Ana Maria, Tsipas, Sophia, Gordo, Elena, Toptan, Fatih
• Format: Journal Article
• Language: English
• Published: United States 09-05-2022
• Subjects: Alloys; Corrosion; Tin; Titanium; β-type Ti alloys; nanotubes; corrosion; tribocorrosion; metal matrix composites
• ISSN: 2373-9878; 2373-9878
• DOI: 10.1021/acsbiomaterials.1c01446

A novel multifunctional material was developed by hard TiN particle reinforcement addition to a β-type Ti40Nb alloy, followed by surface functionalization, yielding the formation of a nanotubular layer. Corrosion and tribocorrosion behaviors were investigated in a phosphate-buffered saline solution at body temperature. The results revealed that the Ti40Nb-TiN composites presented similar
and
values together with relatively similar
and
. However, its tribocorrosion resistance drastically improved (wear volume is almost 15 times lower than an unreinforced alloy) as a consequence of the load-carrying effect given by the reinforcement phases. The corrosion and tribocorrosion behaviors were further improved through surface functionalization as observed by significantly lower
and higher
values and almost undetectable wear volume loss from tribocorrosion tests due to the formation of a well-adhered anatase-rutile TiO
-based nanotubular layer.