材料科学
阴极保护
真空电弧
阴极电弧沉积
类金刚石碳
粘附
腐蚀
沉积(地质)
钻石
兴奋剂
弧(几何)
碳纤维
化学工程
冶金
电化学
纳米技术
复合材料
薄膜
电极
阴极
光电子学
复合数
物理化学
化学
工程类
数学
生物
古生物学
几何学
沉积物
作者
Pornwasa Wongpanya,Praphaphon Silawong,Pat Photongkam
标识
DOI:10.1016/j.ceramint.2022.04.055
摘要
Diamond-like carbon (DLC) films (thickness: ∼118 nm) doped with Al and N on AISI 4140 steel were synthesized using a filtered cathodic vacuum arc technique. The adhesion and corrosion of the ta-C, ta-C:N, ta-C:Al, and ta-C:Al:N films were examined in terms of structure and bonding. X-ray reflectivity, X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy revealed that the Al-doped and Al and N co-doped films had lower densities and internal stresses than the other films, as indicated by their higher I D /I G ratios and graphite cluster size ( L a ) and lower sp 3 relative fractions. All DLC films exhibited improved corrosion resistance as compared to AISI 4140, as indicated by their decreased corrosion rate and increased corrosion potential and polarization resistance. The corrosion resistances of ta-C:Al:N and ta-C:Al films were high owing to the combined effect of sp 3 C–N and Al 2 O 3 , as confirmed by near-edge X-ray absorption fine structure spectroscopy and XPS. All doped DLC films exhibited improved adhesion performance compared to the ta-C film owing to their improved lubrication performance (increased sp 3 -hybridized C–N bonds) and improved toughness (formation of Al 2 O 3 ). • Dopants reduced the sp 3 fraction and density of DLC films. • DLC films improved the corrosion resistance of AISI 4140 in 3.5 wt% NaCl. • Al-N co-doping improved the crack propagation resistance of ta-C. • The ta-C:Al:N film exhibited corrosion resistance and adhesion strength. • Al 2 O 3 and sp 3 C –N bonding improved the corrosion and adhesion performances of ta-C.
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