A bioactive glass topcoat was introduced to modify the surface morphology and in-vitro reactivity of hydroxyap- atite (HA) coatings for biomedical applications. With this aim, a CaO-rich bioactive glass, termed BG_Ca (wt.%: 4.7 Na2O, 42.3 CaO, 6.1 P2O5, and 46.9 SiO2), was selected due to its good bioactivity and low tendency to crystallize at high temperature. The standard HA coatings were sprayed through atmospheric plasma spray (APS) on steel sub- strates starting from commercial powders (“APS-HA” samples). The HA coatings, in turn, were subsequently coated with a thin layer of bioactive glass by suspension plasma spray (SPS), thus obtaining the duplex systems (“APS-HA/SPS-BG_Ca” samples). The samples with and without the BG_Ca layer were analysed by microstructur- al characterization and by in vitro tests in simulated body fluid (SBF). The analysis revealed an increased reactiv- ity of the APS-HA/SPS-BG_Ca samples compared to the glass-free APS-HA coatings.
Functional bioactive glass topcoats on hydroxyapatite coatings: analysis of microstructure and in-vitro bioactivity / Cattini, Andrea; Bellucci, Devis; Sola, Antonella; L., Pawłowski; Cannillo, Valeria. - In: SURFACE & COATINGS TECHNOLOGY. - ISSN 0257-8972. - STAMPA. - 240:(2014), pp. 110-117. [10.1016/j.surfcoat.2013.12.023]
Functional bioactive glass topcoats on hydroxyapatite coatings: analysis of microstructure and in-vitro bioactivity
CATTINI, ANDREA;BELLUCCI, Devis;SOLA, Antonella;CANNILLO, Valeria
2014
Abstract
A bioactive glass topcoat was introduced to modify the surface morphology and in-vitro reactivity of hydroxyap- atite (HA) coatings for biomedical applications. With this aim, a CaO-rich bioactive glass, termed BG_Ca (wt.%: 4.7 Na2O, 42.3 CaO, 6.1 P2O5, and 46.9 SiO2), was selected due to its good bioactivity and low tendency to crystallize at high temperature. The standard HA coatings were sprayed through atmospheric plasma spray (APS) on steel sub- strates starting from commercial powders (“APS-HA” samples). The HA coatings, in turn, were subsequently coated with a thin layer of bioactive glass by suspension plasma spray (SPS), thus obtaining the duplex systems (“APS-HA/SPS-BG_Ca” samples). The samples with and without the BG_Ca layer were analysed by microstructur- al characterization and by in vitro tests in simulated body fluid (SBF). The analysis revealed an increased reactiv- ity of the APS-HA/SPS-BG_Ca samples compared to the glass-free APS-HA coatings.
Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris
