Production and bio-corrosion resistance of porous magnesium with hydroxyapatite coating for biomedical applications

Min Ho Kang, Hyun Do Jung, Sung Won Kim, Sung Mi Lee, Hyoun Ee Kim, Yuri Estrin, Young Hag Koh

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

Biodegradable porous magnesium (Mg) with hydroxyapatite (HA) coating suitable for biomedical applications was fabricated. A blend of Mg and NaCl particles was sintered by spark plasma sintering (SPS), and then the NaCl was dissolved to obtain a porous structure. Different levels of porosity (50%, 60% and 70%) were achieved by adjusting the volume fraction of NaCl, while preserving high pore interconnectivity with a large pore size of~240 μm. In addition, a dense HA coating layer comprised of needle-shaped HA crystals was formed on the surface of the porous Mg by treatment in an aqueous solution. Both bare and HA-coated porous Mg specimens with a porosity of 60% exhibited ductile behavior under compressive loading and similar levels of ultimate compressive strength (~15 MPa). However, HA coating significantly enhanced the corrosion resistance of porous Mg.

Original languageEnglish
Pages (from-to)122-124
Number of pages3
JournalMaterials Letters
Volume108
DOIs
Publication statusPublished - 2013

Keywords

  • Biodegradable
  • Hydroxyapatite coating
  • Magnesium
  • Porous
  • Spark plasma sintering

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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