Tribocorrosion Dependence on Porosity of TiNi Alloys in Phosphate-Buffered Saline Solution

Degradations of implants during their service life lead to rejection because of corrosion and wear-related problems, i.e., toxic ions and wear particles released into the human body. In this case, tribocorrosion tests are appropriate ways to investigate the synergistic effect of the corrosion and we...

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Bibliographic Details
Published in:Journal of bio- and tribo-corrosion 2022-09, Vol.8 (3), Article 67
Main Authors: Kahloul, Latifa, Meddah, Soumaya, Eddine Beliardouh, Nasser, Montagne, Alex, Bououdina, Mohamed, Boudebane, Said
Format: Article
Language:English
Subjects:
Alloy powders
Alloying elements
Alloys
Aluminum oxide
Biomaterials
Biomedical materials
Body fluids
Buffers
Chemistry and Materials Science
Coefficient of friction
Cold pressing
Composition
Corrosion
Corrosion and Coatings
Corrosion effects
Corrosive wear
Intermetallic compounds
Materials Science
Nickel base alloys
Nickel compounds
Particulate matter
Porosity
Powder metallurgy
Saline solutions
Service life
Shape memory alloys
Solid Mechanics
Synergistic effect
Titanium compounds
Transplants & implants
Tribology
Wear particles
Wear rate
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Summary:Degradations of implants during their service life lead to rejection because of corrosion and wear-related problems, i.e., toxic ions and wear particles released into the human body. In this case, tribocorrosion tests are appropriate ways to investigate the synergistic effect of the corrosion and wear phenomena, on the material implant in simulated body fluids. This study aims to analyze the bio-tribology as well as the tribocorrosion performances of porous TiNi alloys, fabricated from elemental powder mixture (Ti, Ni) by powder metallurgy. The effect of the level in porosity, resulting from four (04) different cold pressing, was investigated against alumina ball in phosphate-buffered saline solution (PBS) at 37 °C. SEM/EDS microstructural analyses revealed the presence of various phases with TiNi as the predominant phase. Obtained results showed that the lowest friction coefficient was recorded for the sample with 33% in porosity rate when sliding against an alumina ball in dry conditions. A high tribocorrosion resistance for all the studied TiNi compositions was also observed. Based on the corrosion parameters and the wear rate, the composition with the highest porosity exhibited the optimum performance. Graphical Abstract Influence of the porosity rate on the specific wear rate.
ISSN:2198-4220
2198-4239
DOI:10.1007/s40735-022-00667-z