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

Authors

• Surada Nisaimun
• Phitsanu Poolcharuansin
• Patama Visuttipitukul
• Pitichon Klomjit

Publication Date

2021

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.

DOI

10.55713/jmmm.v31i2.1096

First Page

137

Last Page

146

Recommended Citation

Nisaimun, Surada; Poolcharuansin, Phitsanu; Visuttipitukul, Patama; and Klomjit, Pitichon (2021) "Improving corrosion resistance of 3D printed Ti-6Al-4V by TiN coating," Journal of Metals, Materials and Minerals: Vol. 31: No. 2, Article 19.
DOI: 10.55713/jmmm.v31i2.1096
Available at: https://digital.car.chula.ac.th/jmmm/vol31/iss2/19