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采用电沉积的方法在钛表面制备含氟磷灰石涂层,通过改变电解液中引氟剂氟化钠(NaF)的浓度,研究不同引氟量对所获得涂层晶体结构的影响。分别采用SEM和XRD对涂层的表面形貌和晶体参数进行分析。结果表明,通过该方法可以在钛表面制备纳米含氟磷灰石(FHA)涂层;随着引氟量的增加,磷灰石特征衍射峰强度增强,峰型更尖锐;晶体择优取向逐渐发生改变,晶粒沿c轴方向垂直于电极表面择优生长的,表现为针状和短棒状外观;晶格a轴常数减少,c轴常数保持不变。钛表面电沉积FHA涂层的晶体结构与电解液中加入NaF的浓度有关。随引氟量增加,所得涂层的晶体直径减小,结晶度增加。
Electrodeposition method was used to prepare fluorinated apatite coating on titanium surface. The effect of different amount of fluoridation on the crystal structure of the obtained coating was studied by changing the concentration of sodium fluoride (NaF) in the electrolyte. The surface morphology and crystal parameters of the coatings were analyzed by SEM and XRD respectively. The results show that nano-fluorinated apatite (FHA) coating can be prepared on titanium surface by this method. With the increase of fluoridation amount, the characteristic peak intensity of apatite is enhanced and the peak shape is more acute. The preferred orientation of crystal gradually occurs Change, the c-axis along the c-axis perpendicular to the surface of the electrode preferentially grow, showing acicular and short rod-like appearance; lattice a-axis constant decreases, c-axis constant remains unchanged. The crystal structure of the electrodeposited FHA coating on titanium is related to the concentration of NaF added to the electrolyte. As the amount of fluorine increases, the resulting coating has a reduced crystal diameter and increased crystallinity.