钽涂层多孔钛合金支架的制备与表征

钽金属是一种理想的医用金属材料,能够与人体软/硬组织发生整合。利用化学气相沉积方法,在可控多孔结构的Ti6Al4V合金支架表面沉积涂覆钽金属涂层,使其同时具备理想的三维孔隙结构和力学相容性,以及钽金属优异的生物学性能。研究结果显示,多孔钛合金支架表面涂层前后色泽发生明显变化,涂层后支架呈现钽金属色泽。扫描电镜和XRD分析进一步证明了多孔钛合金支架表面沉积物为钽金属。与美国Zimmer公司生产的多孔钽小梁金属相比,钽涂层多孔钛合金支架具备与人体皮质骨更相似的弹性模量和抗压强度,是一种理想的骨修复替代物。

Preparation and Characterization of Porous Titanium Alloy Scaffold Coated with Tantalum

Tantalum is an ideal medical metal material, which can integrate with human soft/hard tissue. Chemical vapor deposition method was used to deposit tantalum film on the surface of Ti6Al4V scaffolds with controlled porous structure. The Ti6Al4V scaffolds could have ideal three-dimensional pore structure and mechanical compatibility, but also have excellent biological properties of tantalum. The investigation results show that the surface color changes of porous scaffolds before and after coating are obvious. After coating, the scaffolds show Ta metal color. The scanning electron microscopy (SEM) and X-ray diffraction (XRD) tests demonstrate that the deposition on the surface of porous titanium alloy scaffolds is the tantalum metal. Compared to the Zimmer trabecular metal, the elastic modulus and compressive strength of the porous titanium alloy scaffold coated with tantalum are more similar to that of human cortical bone, which could be an ideal substitute for bone repair.