摘要
在不同阳极电压下对Ti-6Al-4V合金进行了微弧氧化处理。考察了阳极电压对氧化膜生长速率、表面形貌、相组成及硬度的影响,并对其摩擦学性能进行了表征。研究结果表明,随着阳极电压的升高,氧化膜表面微孔数量减少,表面微孔孔径、粗糙度、氧化膜生长速率均增大,表面硬度先增大后减小。微弧氧化膜主要由Al2TiO5相和金红石TiO2相组成,随着阳极电压的升高,两者相对比例逐渐增大。阳极电压对微弧氧化膜与钢球的摩擦系数影响不大,但对磨损率影响较大,磨损率随阳极电压的升高先减小后增大,氧化膜均具有较好的耐磨性。
Ti-6Al-4V alloy was treated by micro-arc oxidation at different anodic voltages. The surface morphology, growth rate, surface roughness, phase composition and surface hardness of the oxide film were examined. The tribological properties of oxide film were also analyzed. The experimental results show that with the increase in anodic voltage, the number of micro-pore on the oxide film surface is decreased; but the size of the micro-pore, growth rate and surface roughness of the oxide film are increased. The oxide film is composed mainly by Al_2TiO_5 and TiO_2 phases. The relative ratio of Al_2TiO_5 phase to rutile TiO_2 phase is increased with the increase in anodic voltage. The anodic voltage has little influence on the friction coefficient between oxide film and GCr15 steel ball. On the contrary, the wear rate of the oxide film is related to surface hardness of the oxide film and the wear rate of the oxide film is decreased first and then increased with the increase in anodic voltage. Oxide films have good anti-wear performance.
出处
《电镀与精饰》
CAS
2005年第3期1-4,共4页
Plating & Finishing
基金
国家自然科学基金项目(50172052)(50271080)
国家863项目(2003AA305670)
中科院百人计划
