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采用粉末冶金方法制备了生物可降解的纯镁基体和不同百分含量的羟基磷灰石颗粒增强镁基复合材料。通过压缩试验和电化学测试对复合材料的机械性能和耐腐蚀性能进行了研究。结果表明,复合材料的压缩屈服强度明显高于纯镁基体,并且随着羟基磷灰石含量的增加而提高;电化学测试结果表明,复合材料在生物模拟体液中的腐蚀电位与纯镁基体相比明显提高,其中Mg-20%HA复合材料的腐蚀电位为-1.582 V,腐蚀电流密度为10.84μA/cm2。
The pure magnesium matrix composites with different content of hydroxyapatite particles were prepared by powder metallurgy method. The mechanical properties and corrosion resistance of the composites were studied by compression test and electrochemical test. The results show that the compressive yield strength of the composites is significantly higher than that of the pure magnesium matrix and increases with the content of hydroxyapatite. The electrochemical test results show that the corrosion potential of the composite in the biomimetic body fluid is similar to that of the pure magnesium matrix The corrosion potential of Mg-20% HA composites was -1.582 V and the corrosion current density was 10.84 μA / cm2.