Improving corrosion resistance of 3D printed Ti-6Al-4V by TiN coating

Abstract

TiN thin films were deposited on biomaterial 3D printed Ti-6Al-4V substrates using two methods including direct current magnetron sputtering (DCMS) and high-power impulse magnetron sputtering (HiPIMS). The coating times were compared between 5 min and 25 min. HiPIMS was developed based on DCMS by increasing degree of ionization in plasma and power densities in the order of kWcm-2 compared to Wcm-2 of DCMS. The film characteristics and mechanical properties were investigated by glancing incident x-ray diffractometer (GIXRD), field emission scanning electron microscope (FE-SEM), and atomic force microscope (AFM). Electrochemical behavior was analyzed by electrochemical impedance spectroscopy (EIS) in 1 M NaCl solution. The results showed that TiN films deposited by HiPIMS exhibited an equiaxed structure while those from DCMS had a columnar structure. As a consequence, corrosion resistance of HiPIMS films was better than the DCMS films. Furthermore, increasing coating time resulted in thicker TiN layer and therefore, promoted higher corrosion resistance.

Effect of annealing temperature on the TiO2 anodized films properties for dental implant application

“…The TiO2 films were used as biomaterials due to their non-toxicity and biocompatibility [1][2][3]. They are known for their wide range of applications, including surface self-cleaning [4], oil-water separation, and biomaterials [5][6][7][8]. The hydrophilicity of biomaterial surfaces plays a crucial role in protein adsorption and cellular adhesion.…”