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Exceptional Improvement in the Wear Resistance of Biomedical Β-Type Titanium Alloy With the Use of a Biocompatible Multilayer Si/Dlc Nanocomposite Coating Publisher



Kheradmandfard M1, 2 ; Penkov OV3 ; Kashanibozorg SF4 ; Lee JS5, 6 ; Kim CL7 ; Khadem M1 ; Cho SW5 ; Hanzaki AZ4 ; Kim DE1
Authors
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Authors Affiliations
  1. 1. Department of Mechanical Engineering, Yonsei University, Seoul, 03722, South Korea
  2. 2. Dental Materials Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. ZJU-UIUC Institute, Zhejiang University, International Campus, Haining, 314400, China
  4. 4. School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran
  5. 5. Department of Biotechnology, Yonsei University, Seoul, 03722, South Korea
  6. 6. Department of Intelligent Precision Healthcare Convergence, SKKU Institute of Convergence, Sungkyunkwan University (SKKU), Suwon, 16419, South Korea
  7. 7. Department of Mechanical Engineering, Chosun University, South Korea

Source: Ceramics International Published:2022


Abstract

A silicon/diamond-like carbon (Si/DLC) multilayer nanocomposite coating (MNC) was applied to the Ti–29Nb–13Ta‒4.6Zr (TNTZ) alloy to improve its wear resistance and durability. The Si/DLC MNC on the TNTZ alloy demonstrated an extremely low wear rate of 6.2 × 10−10 mm3N−1mm−1. Moreover, the wear track depth after one million wear cycles was found to be only 220 nm, while the thickness of the entire coating was 370 nm. Furthermore, cell culture tests demonstrated that the Si/DLC MNC samples exhibited better biocompatibility than the TNTZ alloy samples. A quantitative comparison of the cell adhesion behavior of the TNTZ and Si/DLC MNC samples indicated that 60% of the surface of the Si/DLC MNC sample was covered with cells, which was approximately twice the surface of the TNTZ alloy sample covered with cells. In addition, no dead cells were observed on the Si/DLC MNC samples, indicating that the Si/DLC MNC samples exhibited no toxic effects against the MC3T3 cells. These results indicate that the Si/DLC MNC enhances the wear resistance of the TNTZ alloy and improves its biofunctionality, thus making it a potential candidate for use in long-term implant applications. © 2022 Elsevier Ltd and Techna Group S.r.l.
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