为研究成骨细胞在Ti、Ti6Al4V和Ti6Al7Nb三种钛金属表面经喷砂酸蚀处理后的生物活性,通过Al2O3喷砂和盐酸、硫酸混合物酸蚀等表面改性处理技术,在Ti、Ti6Al4V和Ti6Al7Nb三种表面进行喷砂酸蚀处理,通过扫描电镜(scanning electron micros...为研究成骨细胞在Ti、Ti6Al4V和Ti6Al7Nb三种钛金属表面经喷砂酸蚀处理后的生物活性,通过Al2O3喷砂和盐酸、硫酸混合物酸蚀等表面改性处理技术,在Ti、Ti6Al4V和Ti6Al7Nb三种表面进行喷砂酸蚀处理,通过扫描电镜(scanning electron microscope,SEM)观察样品的表面形貌,用3D激光共聚焦显微镜测量样品表面的粗糙度和三维立体结构;将SD大鼠成骨细胞以1×105 cells/m L密度接种于Ti、Ti6Al4V和Ti6Al7Nb表面后通过MTT活性实验观察成骨细胞在样品表面的增殖,通过荧光显微镜观察成骨细胞在样品表面的黏附、生长与增殖。结果显示Ti、Ti6Al4V和Ti6Al7Nb在经过喷砂酸蚀处理后,表面均呈现出微米级多孔形貌,表面粗糙度增加;细胞在SLA处理后的Ti、Ti6Al4V和Ti6Al7Nb表面增殖良好,细胞伸展更为显著;其中又以Ti6Al7Nb表面的细胞数量最多。表明SLA的表面处理能够促进Ti、Ti6Al4V和Ti6Al7Nb的生物活性;经SLA处理的Ti6Al7Nb比Ti和Ti6Al4V表现出更好的生物学活性,成骨细胞在其表面呈现出更好的增殖及黏附能力。展开更多
The tribology behaviors of Ti6Al7Nb,its alloy with N-ion implantation,and its alloy with diamond-like carbon(DLC)coating were investigated in artificial saliva.Fretting wear tests of untreated,N-ion implanted and DLC ...The tribology behaviors of Ti6Al7Nb,its alloy with N-ion implantation,and its alloy with diamond-like carbon(DLC)coating were investigated in artificial saliva.Fretting wear tests of untreated,N-ion implanted and DLC coated Ti6Al7Nb alloys plate against a Si3N4ball were carried out on a reciprocating sliding fretting wear test rig.Based on the analysis of X-ray diffraction,Raman spectroscopy,3-D profiler,SEM morphologies and frictional kinetics behavior analysis,the damage behavior of surface modification layer was discussed in detail.The results indicated that the fretting wear behavior of Ti6Al7Nb alloy with N-ion implantation was increased with the dose increase of the implanted nitrogen ions.Moreover,the DLC-coated Ti6Al7Nb alloy with low ion implantation could improve the fretting wear behavior greatly.In addition,the Ti6Al7Nb with DLC coating had better ncorrosion resistance due to the special compact structure.All results suggested that the Ti6Al7Nb with DLC coating had better wear resistance than that with N-ion implantation in artificial saliva.展开更多
The work aims to characterize the structure and to evaluate in vitro the effect of different surface treatments on the bioactivity of medical grade Ti6Al7 Nb alloy implants manufactured by selective laser melting. In ...The work aims to characterize the structure and to evaluate in vitro the effect of different surface treatments on the bioactivity of medical grade Ti6Al7 Nb alloy implants manufactured by selective laser melting. In order to improve the bioactivity of these samples, they were subjected to heat treatment,chemical treatment, and impregnation with bioactive materials. To evaluate the apatite forming ability, the samples were immersed in simulated body fluid solution) and characterized before and after immersion by scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy.The composition and the texture of the surfaces after the applied treatments have a selective effect on apatite layer development on the surface of samples.展开更多
文摘为研究成骨细胞在Ti、Ti6Al4V和Ti6Al7Nb三种钛金属表面经喷砂酸蚀处理后的生物活性,通过Al2O3喷砂和盐酸、硫酸混合物酸蚀等表面改性处理技术,在Ti、Ti6Al4V和Ti6Al7Nb三种表面进行喷砂酸蚀处理,通过扫描电镜(scanning electron microscope,SEM)观察样品的表面形貌,用3D激光共聚焦显微镜测量样品表面的粗糙度和三维立体结构;将SD大鼠成骨细胞以1×105 cells/m L密度接种于Ti、Ti6Al4V和Ti6Al7Nb表面后通过MTT活性实验观察成骨细胞在样品表面的增殖,通过荧光显微镜观察成骨细胞在样品表面的黏附、生长与增殖。结果显示Ti、Ti6Al4V和Ti6Al7Nb在经过喷砂酸蚀处理后,表面均呈现出微米级多孔形貌,表面粗糙度增加;细胞在SLA处理后的Ti、Ti6Al4V和Ti6Al7Nb表面增殖良好,细胞伸展更为显著;其中又以Ti6Al7Nb表面的细胞数量最多。表明SLA的表面处理能够促进Ti、Ti6Al4V和Ti6Al7Nb的生物活性;经SLA处理的Ti6Al7Nb比Ti和Ti6Al4V表现出更好的生物学活性,成骨细胞在其表面呈现出更好的增殖及黏附能力。
文摘The tribology behaviors of Ti6Al7Nb,its alloy with N-ion implantation,and its alloy with diamond-like carbon(DLC)coating were investigated in artificial saliva.Fretting wear tests of untreated,N-ion implanted and DLC coated Ti6Al7Nb alloys plate against a Si3N4ball were carried out on a reciprocating sliding fretting wear test rig.Based on the analysis of X-ray diffraction,Raman spectroscopy,3-D profiler,SEM morphologies and frictional kinetics behavior analysis,the damage behavior of surface modification layer was discussed in detail.The results indicated that the fretting wear behavior of Ti6Al7Nb alloy with N-ion implantation was increased with the dose increase of the implanted nitrogen ions.Moreover,the DLC-coated Ti6Al7Nb alloy with low ion implantation could improve the fretting wear behavior greatly.In addition,the Ti6Al7Nb with DLC coating had better ncorrosion resistance due to the special compact structure.All results suggested that the Ti6Al7Nb with DLC coating had better wear resistance than that with N-ion implantation in artificial saliva.
文摘The work aims to characterize the structure and to evaluate in vitro the effect of different surface treatments on the bioactivity of medical grade Ti6Al7 Nb alloy implants manufactured by selective laser melting. In order to improve the bioactivity of these samples, they were subjected to heat treatment,chemical treatment, and impregnation with bioactive materials. To evaluate the apatite forming ability, the samples were immersed in simulated body fluid solution) and characterized before and after immersion by scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy.The composition and the texture of the surfaces after the applied treatments have a selective effect on apatite layer development on the surface of samples.
