title: Multilayered TiAlN films on Ti6Al4V alloy for biomedical applications by closed field unbalanced magnetron sputter ion plating process.
abstract: Ti6Al4V alloy has been widely used as a suitable material for surgical implants such as artificial hip joints. In this study, a series of multilayered gradient TiAlN coatings were deposited on Ti6Al4V substrate using closed field unbalanced magnetron sputter ion plating (CFUBMSIP) process. Taguchi design of experiment approach was used to reveal the influence of depositing parameters to the film composition and performance of TiAlN coatings. The phase structure and chemical composition of the TiAlN films were characterized by X-ray diffractometry (XRD) and X-ray photoelectron spectroscopy (XPS). Mechanical properties, including hardness, Young's modulus, friction coefficient, wear rate and adhesion strength were systematically evaluated. Potentiodynamic tests were conducted to evaluate the corrosion resistance of the coated samples in Ringer's solution at 37°C to simulate human body environment. Comprehensive performance of TiAlN films was evaluated by assigning different weight according to the application environment. S8, deposited by Ti target current of 8A, Al target current of 6A, bias voltage of -60V and nitrogen content with OEM (optical emission monitor) value of 45%, was found to achieve best performance in orthogonal experiments. Depositing parameters of S8 might be practically applied for commercialization of surgical implants.
authors.affiliation: State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, P.R. China; Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, Shanghai Jiao Tong University, Shanghai 200240, P.R. China.
authors.forename: Peiyun
authors.initials: P
authors.lastname: Yi
authors.affiliation: State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, P.R. China; Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, Shanghai Jiao Tong University, Shanghai 200240, P.R. China. Electronic address: penglinfa@sjtu.edu.cn.
authors.forename: Linfa
authors.initials: L
authors.lastname: Peng
authors.affiliation: State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, P.R. China.
authors.forename: Jiaqiang
authors.initials: J
authors.lastname: Huang
mesh_terms: D000497:Alloys; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D003343:Corrosion; D055119:Elastic Modulus; D006801:Humans; D060526:Magnetic Fields; D008422:Materials Testing; D008954:Models, Biological; D019736:Prostheses and Implants; D014025:Titanium / Q000737:chemistry*; D014618:Vacuum
chemical_list: D000497:Alloys; D020099:Coated Materials, Biocompatible; C031462:titanium alloy (TiAl6V4); D014025:Titanium
keywords: Biomedical applications; Closed field unbalanced magnetron sputter ion plating; Taguchi method; Ti6Al4V alloy; TiAlN coating