【摘要】 室温下利用溶胶-凝胶法在多孔钛表面制备TiO₂薄膜,并分别于不同温度热处理。利用电化学工作站测试不同温度煅烧后的TiO₂薄膜在0.9%NaCl生理盐水中的耐腐蚀特性;利用XRD、SEM测试技术研究样品在模拟体液（SBF）内浸泡不同时间后的生物活性和显微结构。结果表明,600℃退火的TiO₂薄膜的生物活性最强,只在SBF中浸泡10天就形成表面致密的磷灰石涂层,并且涂层的结晶细小而薄,没有破坏多孔钛的孔隙结构;800℃退火的TiO₂薄膜因其最为致密,在生理盐水中的耐腐蚀性最好。更多还原

【Abstract】 The study used sol-gel method to prepare TiO₂ film on the porous titanium substrate which is made by the powder metallurgy process.The coating samples are annealed at different temperatures.In vitro experiments, the electrochemistry instrument is used to test the corrosion resistance of the TiO₂ coatings annealed at different temperatures in 0.9%NaCl solution.The bioactivity assessments in vitro are performed by soaking the TiO₂ coated substrates into the simulated body fluid（SBF） for various periods.X-ray diffraction and scanning electron microscopy results show that the bioactivity of the TiO₂ coating sample annealed at 600℃is the best,spherules apatite layer covered thoroughly on the sample surface after soaking in SBF for only 10 days and doesn’t destroy the substrate’s porous structure.It is found that the corrosion resistance of the TiO₂ coatings annealed at 800℃in 0.9%NaCl solution is the best,because of its compact structure.更多还原