| YAN Xin,ZHANG Jun,YU Ya-nan.Deposition Process and Properties of TiN and ZrN Films Coated on Stainless Steel Root Canal Files[J],48(4):294-301 |
| Deposition Process and Properties of TiN and ZrN Films Coated on Stainless Steel Root Canal Files |
| Received:October 03, 2018 Revised:April 20, 2019 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2019.04.041 |
| KeyWord:magnetron sputtering stainless steel root file TiN ZrN corrosion resistance cutting performance |
| Author | Institution |
| YAN Xin |
School of Mechanical Engineering, Shenyang University, Shenyang , China |
| ZHANG Jun |
School of Mechanical Engineering, Shenyang University, Shenyang , China |
| YU Ya-nan |
School of Mechanical Engineering, Shenyang University, Shenyang , China |
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| Abstract: |
| The work aims to improve cutting performance of stainless steel root files by coating TiN and ZrN films on the surface. TiN and ZrN thin films were deposited on stainless steel root canal files by magnetron sputtering with adjusting deposition time, substrate bias and duty cycle. The thickness, phase composition, hardness and adhesion of the TiN and ZrN films were examined by SEM, XRD and surface hardness and adhesion tests. The corrosion resistance and the cutting performance of the coated root canal files were analyzed by the electrochemical corrosion test and the simulated clinical cutting test. The thickness, phase structure and hardness of the TiN and ZrN films changed with the deposition process parameters. The corrosion current density of stainless steel root canal files coated with TiN and ZrN films decreased significantly compared with that of the uncoated ones. The optimized deposition processes of TiN and ZrN films were determined to be: deposition time of 1 h, negative bias of 100 V and duty cycle of 60% and 1 h, negative bias of 150 V and duty cycle of 60% respectively. The cutting quantity and efficiency of stainless steel root canal files coated with the optimized process were significantly improved. Compared with the uncoated ones, the stainless steel root canal files coated with TiN and ZrN films improve significantly the surface hardness and corrosion resistance. The stainless steel root canal files optimally coated with TiN and ZrN thin films exhibit the multiple advantages of cutting quantity, cutting efficiency and cutting stability. The cutting efficiency is increased by 60%~75%, and the number of the cut resin root canals is 1.7~2 times in comparison with the uncoated stainless steel root canal files. The remarkable improvements in cutting performance are achieved. |
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