TY - CHAP
T1 - Chemical solution deposition of hydroxyapatite and octacalcium phosphate coatings for magnesium and its alloys to improve biocompatibility
AU - Hiromoto, Sachiko
N1 - Funding Information:
I would like to express my gratitude to Dr. M. Tomozawa and Dr. N. Maruyama for their valuable contributions to this study. I also thank Ms. Sugita and Ms. Imaizumi for their sincere support of the experiments. This work was partially supported by a Grant-in-Aid for Young Scientists (B) (22760568) and a World Premier International Research Center Initiative (WPI) on Materials Nanoarchitectonics (MANA) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan.
Publisher Copyright:
© 2015 Elsevier Ltd. All rights reserved.
PY - 2015/2/5
Y1 - 2015/2/5
N2 - Well-crystallised hydroxyapatite (HAp) and octacalcium phosphate (OCP) were directly coated on Mg/Mg alloys with a novel chemical solution deposition method using a Ca-chelate compound to control corrosion resistance and to improve the biocompatibility of Mg/Mg alloys. Influence of coating treatment conditions (temperature, pH, etc.) on the coatings was examined. Microstructure and composition of the coatings were precisely analysed using X-ray diffraction, Field emission-secondary electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and Fourier transform-infrared spectroscopy. Long-term corrosion behaviour and short-term biocompatibility of the coated Mg alloy were examined with immersion and cell-culture tests, respectively. Adhesiveness of the HAp coating was investigated under static tensile and fatigue loadings. Fatigue behaviour of the HAp-coated Mg alloy was examined in air. The HAp and OCP coatings could control the corrosion rate of the Mg alloy. Fatigue strength of the Mg alloy was not remarkably influenced with the HAp coating. The HAp coating showed excellent adhesiveness under the fatigue loading. The chemical solution deposition method is introduced, and advantageous properties of the HAp- and OCP-coated Mg alloy are discussed.
AB - Well-crystallised hydroxyapatite (HAp) and octacalcium phosphate (OCP) were directly coated on Mg/Mg alloys with a novel chemical solution deposition method using a Ca-chelate compound to control corrosion resistance and to improve the biocompatibility of Mg/Mg alloys. Influence of coating treatment conditions (temperature, pH, etc.) on the coatings was examined. Microstructure and composition of the coatings were precisely analysed using X-ray diffraction, Field emission-secondary electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and Fourier transform-infrared spectroscopy. Long-term corrosion behaviour and short-term biocompatibility of the coated Mg alloy were examined with immersion and cell-culture tests, respectively. Adhesiveness of the HAp coating was investigated under static tensile and fatigue loadings. Fatigue behaviour of the HAp-coated Mg alloy was examined in air. The HAp and OCP coatings could control the corrosion rate of the Mg alloy. Fatigue strength of the Mg alloy was not remarkably influenced with the HAp coating. The HAp coating showed excellent adhesiveness under the fatigue loading. The chemical solution deposition method is introduced, and advantageous properties of the HAp- and OCP-coated Mg alloy are discussed.
KW - Adhesiveness
KW - Calcium phosphate coating
KW - Corrosion
KW - Fatigue
KW - Magnesium/magnesium alloys
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U2 - 10.1016/B978-1-78242-078-1.00003-7
DO - 10.1016/B978-1-78242-078-1.00003-7
M3 - Chapter
AN - SCOPUS:84940038455
SN - 9781782420781
VL - 2
SP - 60
EP - 80
BT - Modification and Coating Techniques
PB - Elsevier Inc.
ER -