Interpenetrated Magnesium-Tricalcium Phosphate Composite:Manufacture, Characterization and In Vitro Degradation Test

• 来源期刊: 金属学报（英文版）
• 年，卷（期）: 2017,（4）
• 页码范围: 319-325
• 页数: 7页
• 语种: 英文
• DOI: 10.1007/s40195-017-0560-0

摘要

Magnesium and calcium phosphates composites are promising biomaterials to create biodegradable load-bearing implants for bone regeneration.The present investigation is focused on the design of an interpenetrated magnesiumtricalcium phosphate (Mg-TCP) composite and its evaluation under immersion test.In the study,TCP porous preforms were fabricated by robocasting to have a prefect control of porosity and pore size and later infiltrated with pure commercial Mg through current-assisted metal infiltration (CAMI) technique.The microstructure,composition,distribution of phases and degradation of the composite under physiological simulated conditions were analysed by scanning electron microscopy,elemental chemical analysis and X-ray diffraction.The results revealed that robocast TCP preforms were full infiltrated by magnesium through CAMI,even small pores below 2 μm have been filled with Mg,giving to the composite a good interpenetration.The degradation rate of the Mg-TCP composite displays lower value compared to the one of pure Mg during the first 24 h of immersion test.