Microstructure and abrasive wear behaviour of anodizing composite films containing SiC nanoparticles on Ti6Al4V alloy
来源期刊：中南大学学报(英文版)2014年第12期
论文作者：LI Song-mei(李松梅) YU Xiu-mei(郁秀梅) 刘建华 于美 WU Liang(吴量) YANG Kang(杨康)
文章页码：4415 - 4423
Key words：Ti6Al4V alloy; anodic oxidation; SiC nanoparticle; composite film
Abstract: Anodized composite films containing SiC nanoparticles were synthesized on Ti6Al4V alloy by anodic oxidation procedure in C4O6H4Na2 electrolyte. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) were employed to characterize the morphology and composition of the films fabricated in the electrolytes with and without addition of SiC nanoparticles. Results show that SiC particles can be successfully incorporated into the oxide film during the anodizing process and preferentially concentrate within internal cavities and micro-cracks. The ball-on-disk sliding tests indicate that SiC-containing oxide films register much lower wear rate than the oxide films without SiC under dry sliding condition. SiC particles are likely to melt and then are oxidized by frictional heat during sliding tests. Potentiodynamic polarization behavior reveals that the anodized alloy with SiC nanoparticles results in a reduction in passive current density to about 1.54×10-8 A/cm2, which is more than two times lower than that of the TiO2 film (3.73×10-8 A/cm2). The synthesized composite film has good anti-wear and anti-corrosion properties and the growth mechanism of nanocomposite film is also discussed.
LI Song-mei(李松梅), YU Xiu-mei(郁秀梅), LIU Jian-hua(刘建华), YU Mei(于美), WU Liang(吴量), YANG Kang(杨康)
(School of Materials Science and Engineering, Beihang University, Beijing 100191, China)
Abstract:Anodized composite films containing SiC nanoparticles were synthesized on Ti6Al4V alloy by anodic oxidation procedure in C4O6H4Na2 electrolyte. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) were employed to characterize the morphology and composition of the films fabricated in the electrolytes with and without addition of SiC nanoparticles. Results show that SiC particles can be successfully incorporated into the oxide film during the anodizing process and preferentially concentrate within internal cavities and micro-cracks. The ball-on-disk sliding tests indicate that SiC-containing oxide films register much lower wear rate than the oxide films without SiC under dry sliding condition. SiC particles are likely to melt and then are oxidized by frictional heat during sliding tests. Potentiodynamic polarization behavior reveals that the anodized alloy with SiC nanoparticles results in a reduction in passive current density to about 1.54×10-8 A/cm2, which is more than two times lower than that of the TiO2 film (3.73×10-8 A/cm2). The synthesized composite film has good anti-wear and anti-corrosion properties and the growth mechanism of nanocomposite film is also discussed.
Key words:Ti6Al4V alloy; anodic oxidation; SiC nanoparticle; composite film
