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 journalArticle

30 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 Jul 24

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Keywords

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

ASJC Scopus subject areas

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

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