TY - JOUR
T1 - Mechanical and chemical properties of Baghdadite coatings manufactured by atmospheric plasma spraying
AU - Pham, D. Q.
AU - Berndt, C. C.
AU - Gbureck, U.
AU - Zreiqat, H.
AU - Truong, V. K.
AU - Ang, A. S.M.
PY - 2019/11/25
Y1 - 2019/11/25
N2 - Baghdadite (Ca3ZrSi2O9) (BAG) is a calcium silicate (Ca–Si) based ceramic that demonstrates osteostimulatory function, biocompability and chemical stability. This work studies atmospheric plasma sprayed (APS) BAG and APS hydroxyapatite (HAp) coatings by evaluating their phase compositions, chemical properties, coating microstructure and mechanical properties. BAG coatings presents well-melted spherical splats without splashes or fragmentations, while HAp coatings reveal irregular splat shapes that exhibit large splashes and fragmentations. The surface of BAG coatings contains uniform features and less variants than the surface of HAp coatings. The BAG coatings present phases of BAG, calcium silicate and zirconium dioxide, while phases of HAp, tricalcium phosphate and calcium oxide can be found in the HAp coating. The BAG coatings show a more uniform microstructure and greater mechanical properties than the HAp coatings, although BAG coatings show lower level of crystallinity compared with the HAp coatings. Microhardness values of BAG coatings are significantly higher than those of HAp coatings. The distribution of mechanical properties including nanohardness and elastic moduli; which are more consistent and less variable in the BAG coating than those of the HAp coating. The presence of zirconium in BAG coatings increased the microhardness, as well as the hardness and elastic moduli derived from nanoindentation measurements, when contrasted with the properties of HAp coatings. The in vitro result indicated that the BAG coating can promote the healthy development of osteoblast-like MG-63.
AB - Baghdadite (Ca3ZrSi2O9) (BAG) is a calcium silicate (Ca–Si) based ceramic that demonstrates osteostimulatory function, biocompability and chemical stability. This work studies atmospheric plasma sprayed (APS) BAG and APS hydroxyapatite (HAp) coatings by evaluating their phase compositions, chemical properties, coating microstructure and mechanical properties. BAG coatings presents well-melted spherical splats without splashes or fragmentations, while HAp coatings reveal irregular splat shapes that exhibit large splashes and fragmentations. The surface of BAG coatings contains uniform features and less variants than the surface of HAp coatings. The BAG coatings present phases of BAG, calcium silicate and zirconium dioxide, while phases of HAp, tricalcium phosphate and calcium oxide can be found in the HAp coating. The BAG coatings show a more uniform microstructure and greater mechanical properties than the HAp coatings, although BAG coatings show lower level of crystallinity compared with the HAp coatings. Microhardness values of BAG coatings are significantly higher than those of HAp coatings. The distribution of mechanical properties including nanohardness and elastic moduli; which are more consistent and less variable in the BAG coating than those of the HAp coating. The presence of zirconium in BAG coatings increased the microhardness, as well as the hardness and elastic moduli derived from nanoindentation measurements, when contrasted with the properties of HAp coatings. The in vitro result indicated that the BAG coating can promote the healthy development of osteoblast-like MG-63.
KW - Atmospheric plasma spray
KW - Baghdadite
KW - Hydroxyapatite
KW - Nanoindentation
KW - Scanning probe microscopy
UR - http://www.scopus.com/inward/record.url?scp=85072219749&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/ARC/IC170100022
U2 - 10.1016/j.surfcoat.2019.124945
DO - 10.1016/j.surfcoat.2019.124945
M3 - Article
AN - SCOPUS:85072219749
SN - 0257-8972
VL - 378
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
M1 - 124945
ER -