Open AccessEffect of TiN/TiO2 multilayer coatings on the properties of stainless steel for biomedical applications
Author(s) -
Todor Hikov,
Maria P. Nikolova,
Petеr Petrov
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1492/1/012029
Subject(s) - materials science , tin , corrosion , titanium nitride , biocompatibility , scanning electron microscope , coating , nanoindentation , titanium , metallurgy , nanoindenter , composite material , nitride , layer (electronics)
A large number of research studies have been focused recently on possible methods for surface modification of metals and alloys. Titanium nitride (TiN) and titanium dioxide (TiO 2 ) films deposited on different substrates have found many applications because of their good mechanical properties, resistance to corrosion, and biocompatibility. The substrates for coating can consist of various kinds of metals and alloys used for manufacturing implants, and endodontic or rotary dental instruments. In this study, stainless steel 304L substrates and endodontic files were coated by a DC-magnetron-sputtered TiN/TiO 2 multilayer; the mechanical and biocompatible properties of the newly deposited films were explored. The structure of the coatings was examined by X-ray diffraction (XRD), whereas the hardness was investigated by nanoindentation. The corrosion resistance was evaluated by potentiodynamic polarization tests in Ringer solution. Each endodontic file coated with TiN/TiO 2 was used for mechanical preparation of five root canals and, afterwards, their surface morphology was studied by scanning electron microscopy (SEM). Our results confirmed that the TiN/TiO 2 multilayer coatings prepared had good stoichiometry and corrosion resistance. Moreover, the pre-coated instruments had a smoother surface and less debris and defects after mechanical preparation of five root canals compared to the non-coated ones. This indicated the usefulness of the coating formed in dental applications.