钛合金表面铜铬合金层性能

Properties of Cu-Cr-Alloyed Layer on Titanium Alloy Surface

利用等离子表面合金化及辉光轰击热扩散复合处理技术在Ti-6Al-4V表面进行铜铬合金化处理。利用薄膜密贴法对合金层抗菌性能进行测试;同时检测其耐磨性。通过X射线衍射(XRD)仪、扫描电子显微镜(SEM)以及能谱仪(EDS)分析合金层的物相结构、表面形貌以及元素成分分布,并利用三维超景深显微镜检测磨痕深度。结果表明,渗层厚度约为12μm;合金层含铜量约为11%,铬含量则达13%;铜铬合金层对大肠杆菌(E.coli)和金黄色葡萄球菌(S.aureus)具有良好的抗菌性能;同时也提高了基材的耐磨性。

The duplex treatment of plasma surface alloying with copper followed by thermal diffusion under the bombardment of glow was carried out on Ti-6Al-4V.The antibacterial properties against Gram-negative E.coli ATCC10536 and Gram-positive S.aureus ATCC25923 of the untreated and duplex-treated alloy were investigated by a spread plate method.In addition,the wear resistance was also tested.X-day diffraction（XRD）,scanning electron microscope（SEM）and energy dispersive spectrometer（EDS）were employed to analyze the phase structure and the elementary composition of the coatings,and the optical microscopy with 3D function was used to detect the wear depth.The results show that the copper concentration of the alloyed surface is about 11 wt%,the chromium concentration is 13%,and the thickness of alloyed layer is about 12 μm.The alloyed surface exhibits excellent antibacterial properties against both E.coli and S.aureus.Meanwhile,the wear resistance is improved significantly.