Processing and in vitro corrosion analysis of sustainable and economical eggshell reinforced Mg and Mg-Zr matrix composite for biomedical applications

M. A. Hussein*, M. A. Azeem, A. Madhan Kumar, Noha M. Emara

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Although magnesium and magnesium alloys have low elasticity and biodegradable capabilities, the rapid rate of degradation of pure Mg in the body affects the mechanical and corrosion properties. In the current work, the Mg and Mg-1Zr matrix composite reinforced with Eggshell (ES) were synthesized using powder metallurgy. The elemental powders were blended using a milling machine, then compacted at 550 MPa and sintered in an inert atmosphere at 450° C for 2 hr. The synthesized composites were characterized in terms of structure, microstructure, densification, and microhardness. In vitro corrosion, performance was studied in Hank's medium. The results showed that the sintered samples of Mg-1Zr, Mg-2.5ES, and Mg-1Zr-2.5ES had a relatively homogeneous distribution of reinforcement, with densifications of 99.65%, 98.9%, and 99.2%, respectively. The sintered Mg-1Zr and Mg-1Zr-2.5ES samples showed enhanced microhardness by 13% and 6% respectively compared to pure Mg. The biocorrosion study revealed the beneficial role of reinforcing Mg with Zr and ES particles and their synergetic effect by showing the higher polarization resistance and lower corrosion rate values in Hank's medium. The finding demonstrates the potential of ES to be used as effective green reinforcement particles in the synthesis of Mg and Mg-Zr-based composite with improved in vitro corrosion properties for biomedical applications.

Original languageEnglish
Article number103944
JournalMaterials Today Communications
Volume32
DOIs
StatePublished - Aug 2022

Bibliographical note

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

  • Biomedical
  • Corrosion
  • Eggshell
  • Magnesium metal matrix composite
  • Mg

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Materials Chemistry

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