A simple approach to design fluorapatite glass-ceramic coatings on the surface modified Ti6Al4V substrates for biomedical applications

Autor: Hudsa Majidian, Pariya Jalalian Haghighat, I. Mobasherpour, Sara Banijamali
Rok vydání: 2021
Předmět:
Zdroj: Journal of the Australian Ceramic Society. 57:673-685
ISSN: 2510-1579
2510-1560
DOI: 10.1007/s41779-021-00574-5
Popis: The present work aims to prepare fluorapatite glass-ceramic coatings being applicable on the Ti6Al4V titanium-based substrates through dip-coating and consequent heat treatment procedures. In this regard, physico-chemical surface modifications of titanium substrates were considered as the key variables to monitor the quality of the glass-ceramic coatings along with the required bioactivity. To this purpose, rough and polished substrates, whether subjected to the surface oxidation stage or not, were coated by a bioactive glass layer (in the system of SiO2-Al2O3-P2O5-K2O-CaO-ZnO-Li2O-F). Coated specimens were then heat treated at 750° and 800°C. Heat-treated specimens were characterized in terms of various analyses techniques including X-ray diffractometry, field emission scanning electron microscopy, and micro-hardness measurement. Among the examined specimens, the samples obtained after three times coating on the sandblasted substrate were considered as the optimized one. According to the obtained results, fluorapatite crystals with needle-like morphology were observable in this glass-ceramic matrix. The bioactivity of the optimized glass-ceramic coating was monitored after in vitro bioactivity assessment performed through SBF (simulated body fluid) immersion after different time intervals of 7, 14, 21, and 28 days. The results of scanning electron microscopy and X-ray diffraction confirmed the homogenous distribution of hydroxyapatite crystals.
Databáze: OpenAIRE
Externí odkaz: