镁及其合金由于具有良好的生物学特性,成为潜在的可生物降解的植入材料；但是其低的抗腐蚀能力会导致植入失败.在镁基体表面获得羟基磷灰石(HA)涂层用以改善镁及其合金的抗腐蚀能力.以硝酸钙和五氧化二磷为前躯体,使用溶胶-凝胶法制备出羟基磷灰石,并使用旋涂法在工业纯镁表面合成羟基磷灰石(HA)涂层.样品利用X射线衍射仪(XRD)、扫描电镜(SEM)进行了表征,并探讨了热处理温度对涂层的影响以及涂层的生成机理.%Magnesium and its alloys are potential biodegradable implant materials due to their attractive biological property. But their poor corrosion resistance may result in the sudden failure of the implants. The hydroxyapatite ( HA) coating was derived on magnesium surface to improve its corrosion resistance. The calcium nitrate and phosphorus pentoxide were used as precursor to prepare hydroxyapatite layer by sol-gel method, followed by a spin-coating method to coat hydroxyapatite layer onto commercial pure Mg. The samples were characterized by X-ray diffraction (XRD) , scanning electron microscopy (SEM). The effect of heat temperature on the coatings and water-solution mechanism are discussed.
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