2016
Volume 16, Number 3, pp. 126–130
Properties of magnetron hydroxyapatite coatings deposited on oxidized substrates
V.V. Starikov,1, * A.V. Kostuchenko,2 S.L. Starikova,3 A.G. Mamalis4 and S.N. Lavrynenko1
1National Technical University “Kh.P.I.”, Kharkov, Ukraine
2Voronezh State University, Voronezh, Russia
3Kharkov Medical Academy of Post-Graduate Education, Kharkov, Ukraine
4Project Centre for Nanotechnology and Advanced Engineering, NCSR “Demokritos”, Athens, Greece
Hydroxyapatite (HA) coating were formed on oxidized niobium surfaces by the high-frequency magnetron sputtering method using hydroxyapatite and tricalcium phosphate targets. The structure, substructure and mechanical properties of the Nb–Nb2O5–HA system were investigated by X-ray diffraction, atomic force microscopy and nanoindentation and the stress state was assessed. The synthesized hydroxyapatite film had the following characteristics: thermal expansion coefficient 10–5 K–1; modulus of elasticity 120 GPa; adhesive strength not less than 0.45 kg/mm2; density 2900 kg/m3. The stress magnitude in the metal oxide substrate was from 11 to 14 MPa after hydroxyapatite film deposition.
Keywords:elasticity modulus, hydroxyapatite, magnetron sputtering, nanohardness, macrostresses, oxide