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Reinforced magnesium composites by metallic particles for biomedical applications

机译:用于生物医学应用的金属颗粒增强的镁复合材料

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摘要

Pure magnesium (Mg) implants have unsatisfactory mechanical properties, particularly in loadbearing applications. Particulate-reinforced Mg composites are known as promising materials to provide higher strength implants compared to unreinforced metals. In the current work biocompatible niobium (Nb) and tantalum (Ta) particles are selected as reinforcement, and Mg-Nb and Mg-Ta composites fabricated via a powder metallurgy process associated with the ball milling technique. The effect of Nb and Ta contents on the microstructure and mechanical properties of Mg matrix was investigated. There was a uniform distribution of reinforcements in the Mg matrix with reasonable integrity and no intermetallic formation. The compressive mechanical properties of composites vary with reinforcement contents. The optimal parameters to fabricate biocompatible Mg composites and the optimal composition with appropriate strength, hardness and ductility are recommended.
机译:纯镁(Mg)植入物的机械性能不理想,尤其是在承重应用中。颗粒增强的镁复合材料被公认为是有希望的材料,与未增强的金属相比,可以提供更高强度的植入物。在当前的工作中,选择生物相容的铌(Nb)和钽(Ta)颗粒作为增强材料,并通过与球磨技术相关的粉末冶金工艺制造Mg-Nb和Mg-Ta复合材料。研究了Nb和Ta含量对Mg基体组织和力学性能的影响。镁基体中钢筋分布均匀,具有合理的完整性,没有金属间形成。复合材料的压缩机械性能随增强材料含量的变化而变化。建议制造生物相容性镁复合材料的最佳参数以及具有适当强度,硬度和延展性的最佳组成。

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