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Effects of anodization voltage on CaP/Al_2O_3-Ti nanometre biocomposites

机译：阳极氧化电压对CaP / Al_2O_3-Ti纳米生物复合材料的影响

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Nanometre CaP/Al_2O_3-Ti biocomposites for implant applications were successfully fabricated using a hybrid technique of anodization and hydrothermal treatment, in which CaP/Al_2O_3 formed a double-layer coating on titanium with porous CaP as the top layer and anodic Al_2O_3 film as the intermediate layer. Techniques, such as x-ray diffraction (XRD), electron scanning microscopy and energy disperse x-ray analysis (SEM + EDX), transmission electron microscopy (TEM) and atomic force microscopy (AFM), were used to investigate the composition, microstructure and morphology of the fabricated CaP/Al_2O_3 composite coating and the CaP/Al_2O_3-Ti biocomposites. XRD results showed that the fabricated composite coating contained Al_2O_3 and various calcium phosphate phases. SEM and TEM micrographs confirmed that CaP crystals were in nanometres, embedded in situ in the walls of the cylindrical structure of anodic alumina, and finally formed a thin and porous top layer on the anodic alumina intermediate layer. The nanometre and T-shape effects of the CaP top layer, and the porous and cylindrical microstructure of CaP/Al_2O_3 composite coating could produce an excellent combination of bioactivity and mechanical integrity of the CaP/Al_2O_3-Ti biocomposites. It was also found that the anodization voltage of the anodization process played an important role on the composition and microstructure of the fabricated CaP/Al_2O_3-Ti biocomposites. The contents of Ca and P incorporated in anodic alumina depended strongly on the anodization voltage. Their variations could result in different CaP phases, CaP crystal shapes and sizes, and topography of the CaP/Al_2O_3-Ti biocomposites. The optimal anodization voltage in this study was found to be in the range 40-60 V.
机译：利用阳极氧化和水热处理的混合技术成功地制备了用于植入物的纳米CaP / Al_2O_3-Ti生物复合材料，其中CaP / Al_2O_3在钛上形成双层涂层，多孔CaP为顶层，阳极Al_2O_3膜为中间层层。 X射线衍射（XRD），电子扫描显微镜和能量分散X射线分析（SEM + EDX），透射电子显微镜（TEM）和原子力显微镜（AFM）等技术用于研究成分，微观结构CaP / Al_2O_3复合涂层和CaP / Al_2O_3-Ti生物复合材料的形貌和形貌。 XRD结果表明，所制备的复合涂层含有Al_2O_3和各种磷酸钙相。 SEM和TEM显微照片证实CaP晶体为纳米级，原位嵌入阳极氧化铝圆柱结构的壁中，并最终在阳极氧化铝中间层上形成了一层薄而多孔的顶层。 CaP顶层的纳米和T形效应，以及CaP / Al_2O_3复合涂层的多孔和圆柱形微结构可以将CaP / Al_2O_3-Ti生物复合材料的生物活性和机械完整性完美地结合在一起。还发现，阳极氧化工艺的阳极氧化电压对所制备的CaP / Al_2O_3-Ti生物复合材料的组成和微观结构起着重要作用。掺入阳极氧化铝中的Ca和P的含量在很大程度上取决于阳极氧化电压。它们的变化可能导致不同的CaP相，CaP晶体形状和大小以及CaP / Al_2O_3-Ti生物复合材料的形貌。这项研究中的最佳阳极氧化电压为40-60V。

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