Acta Metallurgica Sinica (English Letters) ›› 2017, Vol. 30 ›› Issue (4): 319-325.DOI: 10.1007/s40195-017-0560-0

Special Issue: 2017复合材料专辑 2017腐蚀虚拟专辑

• Orginal Article • Previous Articles     Next Articles

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

Mariano Casas-Luna1, Serhii Tkachenko1, Miroslava Horynová1, Lenka Klakurková1, Pavel Gejdos1, Sebastian Diaz-de-la-Torre2, Ladislav Celko1, Jozef Kaiser1, Edgar B. Montufar1()   

  1. 1.CEITEC - Central European Institute of TechnologyBrno University of TechnologyBrnoCzech Republic
    2.CIITEC - Centro de Investigación e Innovación TecnológicaInstituto Politécnico NacionalMexico CityMexico
  • Received:2017-03-09 Revised:2017-03-09 Online:2017-03-09 Published:2017-05-17

Abstract:

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 magnesium-tricalcium 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.

Key words: Calcium phosphate, Magnesium, Liquid metal infiltration, Spark plasma sintering, Corrosion