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为克服钛合金生物膜层单一相的缺陷,以Ti6Al4V合金为基体,用微弧氧化法制得具有双相钙磷复合陶瓷膜层(BCP)的钛合金器件。通过控制工作液成分制得由不同比例的β-磷酸三钙(β-TCP)和羟基磷灰石(HA)组成的多孔性复合膜层。研究了电源占空比对BCP膜孔隙率和孔径大小的影响。采用能谱仪和X射线衍射仪分析了BCP膜层的组成与构相。通过模拟体液浸泡(SBF)和生物体植入试验,研究了BCP膜的生物相容性。结果表明,提高BCP膜层中的HA含量,有利于类骨物质的生成;而提高β-TCP含量,能使膜层中类骨物质的形成速率加快。当n(HA)/n(β-TCP)=6:4时,BCP膜的生物相容性最佳。
In order to overcome the defects of the single phase of the titanium alloy biofilm layer, Ti6Al4V alloy was used as the substrate, and the titanium alloy with biphasic calcium phosphate composite ceramic coating (BCP) was prepared by micro-arc oxidation. By controlling the composition of the working fluid, a porous composite membrane layer composed of β-tricalcium phosphate (β-TCP) and hydroxyapatite (HA) in different ratios was prepared. The effect of power duty cycle on the porosity and pore size of BCP films was investigated. The composition and phase structure of BCP film were analyzed by EDS and XRD. The biocompatibility of BCP membranes was studied by simulated somatic immersion (SBF) and in vivo implantation experiments. The results showed that increasing the content of HA in the BCP film was beneficial to the formation of bone-like substances, while increasing the content of β-TCP accelerated the formation of bone-like substances in the film. The biocompatibility of BCP films is the best when n (HA) / n (β-TCP) = 6: 4.