TY - JOUR AU - NISAIMUN, Surada AU - POOLCHARUANSIN, Phitsanu AU - VISUTTIPITUKUL, Patama AU - KLOMJIT, Pitichon PY - 2021/06/27 Y2 - 2024/03/29 TI - Improving corrosion resistance of 3D printed Ti-6Al-4V by TiN coating JF - Journal of Metals, Materials and Minerals JA - J Met Mater Miner VL - 31 IS - 2 SE - Original Research Articles DO - 10.55713/jmmm.v31i2.1096 UR - https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/1096 SP - 137-146 AB - <p class="western" align="left"><span style="font-family: Calibri, serif;"><span style="font-size: small;"><span style="font-family: Times New Roman, serif;">TiN thin films were deposited on biomaterial 3D printed Ti-6Al-4V substrates using two methods </span><span style="font-family: Times New Roman, serif;">including direct current magnetron sputtering (DCMS) and high-power impulse magnetron sputtering</span><span style="font-family: Times New Roman, serif;"> (</span><span style="font-family: Times New Roman, serif;">HiPIMS). The coating times were compared between 5 min and 25 min. HiPIMS was developed</span> <span style="font-family: Times New Roman, serif;">based on DCMS by increasing degree of ionization in plasma and power densities in the order</span><span style="font-family: Times New Roman, serif;"> of </span><span style="font-family: Times New Roman, serif;">kW</span><span style="font-family: Symbol, serif;"></span><span style="font-family: Times New Roman, serif;">cm</span><sup><span style="font-family: Times New Roman, serif;">-2</span></sup><span style="font-family: Times New Roman, serif;"> compared to W</span><span style="font-family: Symbol, serif;"></span><span style="font-family: Times New Roman, serif;">cm</span><sup><span style="font-family: Times New Roman, serif;">-2</span></sup><span style="font-family: Times New Roman, serif;"> of DCMS. The film characteristics and mechanical properties were</span><span style="font-family: Times New Roman, serif;"> investigated</span><span style="font-family: Times New Roman, serif;"> 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. </span></span></span></p> ER -