Anodized composite films containing Si C nanoparticles were synthesized on Ti6Al4 V alloy by anodic oxidation procedure in C4O6H4Na2 electrolyte. Scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS) ...Anodized composite films containing Si C nanoparticles were synthesized on Ti6Al4 V 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 Si C nanoparticles. Results show that Si C 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 Si C-containing oxide films register much lower wear rate than the oxide films without Si C under dry sliding condition. Si C particles are likely to melt and then are oxidized by frictional heat during sliding tests. Potentiodynamic polarization behavior reveals that the anodized alloy with Si C 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 Ti O2 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.展开更多
研究了硬质合金表面Ni P 纳米Ti(C,N)化学复合镀工艺以及热处理对复合镀层性能影响的规律。结果表-);2)较好的明:1)施镀工艺中各因素对镀速影响的显著性顺序是:温度→pH值→纳米Ti(C,N)加入量→χ(Ni2+ H2PO2施镀工艺为:28g L氯化镍、... 研究了硬质合金表面Ni P 纳米Ti(C,N)化学复合镀工艺以及热处理对复合镀层性能影响的规律。结果表-);2)较好的明:1)施镀工艺中各因素对镀速影响的显著性顺序是:温度→pH值→纳米Ti(C,N)加入量→χ(Ni2+ H2PO2施镀工艺为:28g L氯化镍、25.76g L次亚磷酸钠,50g L氯化铵、45g L柠檬酸钠,0.001g LPbCl2,6g L纳米Ti(C,N),pH=10,温度为80℃。3)Ni P 纳米Ti(C,N)复合镀层较优的热处理工艺为:在400℃保温150min。采用所推荐的施镀和热处理工艺,获得了硬度是硬质合金基体硬度的2.16倍的Ni P 纳米Ti(C,N)复合镀层。并对以上结果产生的原因进行了简单讨论。展开更多
基金Project(51271012)supported by the National Natural Science Foundation of China
文摘Anodized composite films containing Si C nanoparticles were synthesized on Ti6Al4 V 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 Si C nanoparticles. Results show that Si C 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 Si C-containing oxide films register much lower wear rate than the oxide films without Si C under dry sliding condition. Si C particles are likely to melt and then are oxidized by frictional heat during sliding tests. Potentiodynamic polarization behavior reveals that the anodized alloy with Si C 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 Ti O2 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.
文摘 研究了硬质合金表面Ni P 纳米Ti(C,N)化学复合镀工艺以及热处理对复合镀层性能影响的规律。结果表-);2)较好的明:1)施镀工艺中各因素对镀速影响的显著性顺序是:温度→pH值→纳米Ti(C,N)加入量→χ(Ni2+ H2PO2施镀工艺为:28g L氯化镍、25.76g L次亚磷酸钠,50g L氯化铵、45g L柠檬酸钠,0.001g LPbCl2,6g L纳米Ti(C,N),pH=10,温度为80℃。3)Ni P 纳米Ti(C,N)复合镀层较优的热处理工艺为:在400℃保温150min。采用所推荐的施镀和热处理工艺,获得了硬度是硬质合金基体硬度的2.16倍的Ni P 纳米Ti(C,N)复合镀层。并对以上结果产生的原因进行了简单讨论。
