TY - JOUR
T1 - Growth mechanism of hydroxyapatite-coatings formed on pure magnesium and corrosion behavior of the coated magnesium
AU - Tomozawa, Masanari
AU - Hiromoto, Sachiko
N1 - Funding Information:
The authors are grateful to Ms. Sugita for the preparation of the specimens. This work was partially supported by a Grant-in-Aid for Young Scientists (B) ( 22760568 ) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan .
PY - 2011/7/15
Y1 - 2011/7/15
N2 - Hydroxyapatite (HAp) coatings were uniformly formed on pure Mg by a hydrothermal treatment using a C 10 H 12 N 2 O 8 Na 2 Ca (Ca-EDTA) solution. The growth mechanism of the HAp coating was investigated with XRD, SEM and TEM. At the initial stage, dome-shape HAp precipitates were formed on the Mg. Subsequently, the precipitates grew and the coating became a dual-layer consisting of an inner dense HAp layer and outer course layer consisting of rod-like HAp crystals. The protectiveness of the coatings with different treatment times was investigated by a polarization test in a 3.5 wt.% NaCl solution. The corrosion current density decreased with the growth of the HAp coating.
AB - Hydroxyapatite (HAp) coatings were uniformly formed on pure Mg by a hydrothermal treatment using a C 10 H 12 N 2 O 8 Na 2 Ca (Ca-EDTA) solution. The growth mechanism of the HAp coating was investigated with XRD, SEM and TEM. At the initial stage, dome-shape HAp precipitates were formed on the Mg. Subsequently, the precipitates grew and the coating became a dual-layer consisting of an inner dense HAp layer and outer course layer consisting of rod-like HAp crystals. The protectiveness of the coatings with different treatment times was investigated by a polarization test in a 3.5 wt.% NaCl solution. The corrosion current density decreased with the growth of the HAp coating.
KW - Bioabsorbable metals
KW - Corrosion resistant coatings
KW - Hydrothermal treatment
KW - Hydroxyapatite
KW - Magnesium
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U2 - 10.1016/j.apsusc.2011.04.087
DO - 10.1016/j.apsusc.2011.04.087
M3 - Article
AN - SCOPUS:79958806202
SN - 0169-4332
VL - 257
SP - 8253
EP - 8257
JO - Applied Surface Science
JF - Applied Surface Science
IS - 19
ER -