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 language | English |
|---|---|
| Pages (from-to) | 122-124 |
| Number of pages | 3 |
| Journal | Materials Letters |
| Volume | 108 |
| DOIs | |
| State | Published - 2013 |
Bibliographical note
Funding Information:This research was supported by the International Collaborative R&D Program(No. 2010-BS-101007-001) funded by the Ministry of Knowledge & Economy, Republic of Korea and Korea Healthcare technology R&D Project ( No. A121035 ) funded by Ministry for Health, Welfare & Family Affairs, Republic of Korea .
Keywords
- Biodegradable
- Hydroxyapatite coating
- Magnesium
- Porous
- Spark plasma sintering
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