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用纯镁做基体,以化学沉淀法制备的类球状纳米羟基磷灰石(HA)粉体为增强体,采用粉末冶金法制备了含HA40%的HA/Mg复合材料。对所制备复合材料的组织、物相以及在模拟体液(simulated body fluid,简称SBF)中的生物活性进行了研究。结果表明:HA相均匀分布于镁基体中,形成理想的网状组织结构;复合材料在烧结后内部相组成以HA和Mg为主,烧结过程中没有发生化学反应;随着浸泡时间的延长,表面沉积物质增多,对其进行能谱分析发现沉积物质富含Ca、P和C元素,分析认为生成物为含碳酸根的羟基磷灰石,说明复合材料具有较好的生物活性。
Using pure magnesium as substrate, the spherical hydroxamic apatite (HA) powder prepared by chemical precipitation was used as reinforcement to prepare HA / Mg composites containing HA40% by powder metallurgy method. The structure and phase of the prepared composite material and the biological activity in simulated body fluid (SBF) were studied. The results show that the HA phase is uniformly distributed in the magnesium matrix to form the ideal network structure. The internal phase composition of the composite is mainly composed of HA and Mg after sintering, and no chemical reaction takes place during the sintering process. With the extension of immersion time, The surface sediment increased, its energy spectrum analysis found that the sediment is rich in Ca, P and C elements, the analysis that the product is hydroxyapatite carbonate, indicating that the composite has good biological activity.