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目的研究改良热分解法制备的钛金属表面钛酸钙复合涂层材料的特性。方法应用改良热分解法在钛金属表面制备钛酸钙复合涂层材料,该涂层由含有无定形碳的钛酸钙(CaTiO3-αC)与羟基磷灰石(HA)组成。实验中通过控制钙磷比(Ca/P)、钙钛比(Ca/Ti)、烧结温度和烧结速率,使CaTiO3颗粒的晶体结构中含有摩尔分数为4%的无定形碳。结果通过对HA中碳的检测,证实了存在碳酸磷灰石的结构。钛表面的黏附-分离实验显示,CaTiO3-αC/HA涂层的黏附强度是单纯HA涂层的2.5倍。结论改良热分解法制备的CaTiO3-αC层(0.6μm厚)和含有碳酸磷灰石的HA层(2.4μm厚)组成的双层生物活性材料能够作为钛表面理想的涂层材料。
Aim To study the characteristics of modified calcium titanate composite coating prepared by modified pyrolysis method. Methods A modified titanate (CaTiO3-αC) and hydroxyapatite (HA) containing amorphous carbon were prepared on the surface of titanium by modified thermal decomposition method. In the experiment, the crystalline structure of CaTiO3 particles contains 4% mole fraction of amorphous carbon by controlling Ca / P ratio, Ca / Ti ratio, sintering temperature and sintering rate. Results The detection of carbon in HA confirmed the presence of carbonic acid apatite. Adhesion-detachment experiments on the surface of titanium show that the adhesion strength of CaTiO3-αC / HA coating is 2.5 times that of pure HA coating. Conclusion The bilayer bioactive material consisting of CaTiO3-αC layer (0.6 μm thick) and HA layer (2.4 μm thick) containing apatite prepared by the improved pyrolysis method can be used as the ideal coating material for titanium surface.