摘要
对AZ31镁合金表面进行了钛离子注入试验,研究了钛离子注入对于镁合金表面改性层的影响。通过XRD、XPS研究了改性层的相结构和元素分布,通过硬度和摩擦磨损试验研究了改性层的力学性能。结果表明,经过钛离子注入之后,改性层中并无新相生成;当注入剂量为2.5×1017ion/cm2时,改性层深度可以达到160 nm,改性层中Ti呈高斯分布,存在形式从外到内为TiO2向Ti过渡。经过钛离子注入之后,镁合金表面硬度大大提高;改性层的摩擦因数并没有降低,但是耐磨性有所提高。随钛离子注入剂量的增加,改性层的耐腐蚀性能呈先上升后下降趋势。
Titanium ions are implanted into the surface of AZ31 magnesium alloy by metal vapor vacuum arc（MEVVA） technique.The titanium implanting effect on modification of magnesium alloy surface-layers has been investigated.The structure of modified surface-layer has been analyzed by X-ray diffraction（XRD） and X-ray photoelectron spectroscopy（XPS） to detect the phase compositions and distribution of elements in the layer.The hardness and friction-wear test of the films have been tested in order to investigate the mechanical property of the modified layer.The results show that there is no new phase forming after titanium ion implanting;while titanium implanting dosage reach to 2.5×1017 ion/cm2 the modified layer thickness gets to 160 nm;the titanium ions in the layer accord with Gaussian distribution;the titanium exists as TiO2 and the content transits from TiO2 at the outer to Ti at the inner layer.It was found that the surface micro-hardness of the magnesium alloy was significantly increased after titanium implanting.Although the friction coefficient of the modified layer has no been decreased,but the wear resistance has been increased.With the increasing of titanium implanting dosage the corrosion resistance raises and then declines.
出处
《轻合金加工技术》
CAS
北大核心
2011年第8期45-49,共5页
Light Alloy Fabrication Technology
基金
滨州学院"青年人才创新工程"科研基金(BZXYQNLG200817)
关键词
镁合金
离子注入
力学性能
耐蚀性
magnesium alloy
ion implantation
mechanical property
corrosion resistance
