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中文摘要：
采用大气等离子喷涂在镁合金AZ31B表面制备了可降解钙/磷涂层。利用XRD、SEM、EDS分析了涂层的相组成、结晶度及在人体模拟液（SBF）中浸泡前后的显微形貌和元素组成,根据pH值和降解速率研究了涂层的体外降解性能。研究表明：钙/磷涂层与镁合金基体紧密结合,致密度高,涂层由较难降解的HA相和较易降解的Ca3（PO4）2、Ca4P2O9和CaO组成,涂层中HA结晶度为49.3%。生物降解性能研究显示,钙/磷涂层材料在SBF溶液中的pH值和降解速率均小于镁合金基体,且较小的变化幅度使涂层材料的降解行为控制在稳定范围内。
英文摘要：
The biodegradable calcium/phosphate coating on the surface of the magnesium alloy AZ31B was prepared by atmospheric plasma spraying.The phase compositions and crystallinity of the coating were quantitative investigated by XRD,and the microscopic morphology and elemental composition of the coating before and after immersion in the simulated body fluid（SBF） were investigated by SEM and EDS.The degradability of magnesium alloy with calcium/phosphorus coating in SBF solution were studied according to the pH value and the degradation rate of the coating.The results show that the high density calcium/phosphate coating is closely integrated with the magnesium alloy substrate.The coating is composed of HA with difficult degradation and Ca3（PO4）2,Ca4P2O9 and CaO with easy degradation,and the crystallinity of HA in the coating is 49.3%.In addition,the study of biodegradation shows that the pH value and the degradation rate of the calcium/phosphorus coating in SBF are less than that of magnesium alloy,and the smaller change magnitude makes the coating material＇s degradation be controlled in a stable range.
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