Journal
JOURNAL OF BIOMATERIALS APPLICATIONS
Volume 32, Issue 1, Pages 12-27Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0885328217712109
Keywords
Nitriding; titanium nitride; tribological properties; electrochemical resistance; biocompatibility
Funding
- Ministry of Science and Technology of Taiwan [MOST 104-2221-E270-006]
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AISI 316L specimens were nitrided using a low temperature (390?) plasma nitriding process and then coated with a thin layer of titanium nitride by closed field unbalanced magnetron sputtering. The microstructure, adhesion properties and hardness of the duplex-treated samples were examined using X-ray diffraction, scratch testing and nanoindentation, respectively. In addition, the tribological properties were investigated by means of reciprocating wear tests performed against 316L, Si3N4 and Ti6Al4V balls under a load of 10 N for 24min in 0.9% NaCl solution. The electrochemical resistance of the samples was evaluated by potentiodynamic polarisation tests. Finally, the biocompatibility of the samples was investigated by seeding purified mouse leukemic monocyte macrophage cells (Raw 264.7) on the sample surface for one, three and five days, respectively. In general, the results showed that the duplex nitriding and titanium nitride coating process significantly improved the tribological properties, electrochemical resistance and biocompatibility of the AISI 316L samples.
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