TY - JOUR
T1 - Bio-corrosion behavior and mechanical characteristics of magnesium-titania-hydroxyapatite nanocomposites coated by magnesium-oxide flakes and silicon for use as resorbable bone fixation material
AU - Khalajabadi, Shahrouz Zamani
AU - Abu, Aminudin Bin Haji
AU - Ahmad, Norhayati
AU - Yajid, Muhammad Azizi Mat
AU - Hj Redzuan, Norizah Bt
AU - Nasiri, Rozita
AU - Haider, Waseem
AU - Noshadi, Iman
N1 - Funding Information:
The authors would like to acknowledge the Universiti Teknologi Malaysia (UTM) and financial support under FRGS Grant Numbers 4F608 , 09H80 , 4F648 and 4F808 .
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2018/1
Y1 - 2018/1
N2 - This study was aimed to improve of the corrosion resistance and mechanical properties of Mg/15TiO2/5HA nanocomposite by silicon and magnesium oxide coatings prepared using a powder metallurgy method. The phase evolution, chemical composition, microstructure and mechanical properties of uncoated and coated samples were characterized. Electrochemical and immersion tests used to investigate the in vitro corrosion behavior of the fabricated samples. The adhesion strength of ~36 MPa for MgO and ~32 MPa for Si/MgO coatings to substrate was measured by adhesion test. Fabrication a homogenous double layer coating with uniform thicknesses consisting micro-sized particles of Si as outer layer and flake-like particles of MgO as the inner layer on the surface of Mg/15TiO2/5HA nanocomposite caused the corrosion resistance and ductility increased whereas the ultimate compressive stress decreased. However, after immersion in SBF solution, Si/MgO-coated sample indicates the best mechanical properties compared to those of the uncoated and MgO-coated samples. The increase of cell viability percentage of the normal human osteoblast (NHOst) cells indicates the improvement in biocompatibility of Mg/15TiO2/5HA nanocomposite by Si/MgO coating.
AB - This study was aimed to improve of the corrosion resistance and mechanical properties of Mg/15TiO2/5HA nanocomposite by silicon and magnesium oxide coatings prepared using a powder metallurgy method. The phase evolution, chemical composition, microstructure and mechanical properties of uncoated and coated samples were characterized. Electrochemical and immersion tests used to investigate the in vitro corrosion behavior of the fabricated samples. The adhesion strength of ~36 MPa for MgO and ~32 MPa for Si/MgO coatings to substrate was measured by adhesion test. Fabrication a homogenous double layer coating with uniform thicknesses consisting micro-sized particles of Si as outer layer and flake-like particles of MgO as the inner layer on the surface of Mg/15TiO2/5HA nanocomposite caused the corrosion resistance and ductility increased whereas the ultimate compressive stress decreased. However, after immersion in SBF solution, Si/MgO-coated sample indicates the best mechanical properties compared to those of the uncoated and MgO-coated samples. The increase of cell viability percentage of the normal human osteoblast (NHOst) cells indicates the improvement in biocompatibility of Mg/15TiO2/5HA nanocomposite by Si/MgO coating.
KW - Adhesion strength
KW - Cell viability
KW - Immersion
KW - Mg/TiO-based nanocomposite
KW - Si/MgO coating
KW - UCS
UR - http://www.scopus.com/inward/record.url?scp=85030320887&partnerID=8YFLogxK
U2 - 10.1016/j.jmbbm.2017.09.032
DO - 10.1016/j.jmbbm.2017.09.032
M3 - Article
C2 - 28985616
AN - SCOPUS:85030320887
VL - 77
SP - 360
EP - 374
JO - Journal of the Mechanical Behavior of Biomedical Materials
JF - Journal of the Mechanical Behavior of Biomedical Materials
SN - 1751-6161
ER -