Biomineralization capability of adherent bio-glass films prepared by magnetron sputtering

abstract

Radiofrequency magnetron sputtering deposition at low temperature (150A degrees C) was used to deposit bioactive glass coatings onto titanium substrates. Three different working atmospheres were used: Ar 100%, Ar + 7%O(2), and Ar + 20%O(2). The preliminary adhesion tests (pull-out) produced excellent adhesion values (similar to 75 MPa) for the as-deposited bio-glass films. Bioactivity tests in simulated body fluid were carried out for 30 days. SEM-EDS, XRD and FTIR measurements were performed. The tests clearly showed strong bioactive features for all the prepared films. The best biomineralization capability, expressed by the thickest chemically grown carbonated hydroxyapatite layer, was obtained for the bio-glass coating sputtered in a reactive atmosphere with 7% O(2).

keywords

PULSED-LASER DEPOSITION; SIMULATED BODY-FLUID; BIOACTIVE GLASS; CAO-MGO-SIO2 SYSTEM; P2O5 ADDITIVES; THIN-FILMS; COATINGS; CERAMICS; IMPLANTS; BIOGLASS

subject category

Engineering; Materials Science

authors

Stan, GE; Pina, S; Tulyaganov, DU; Ferreira, JMF; Pasuk, I; Morosanu, CO

our authors

acknowledgements

Thanks are due to CICECO for the support and to the Portuguese Foundation for Science and Technology for the fellowship grants of S. Pina (SFRH/BD/21761/2005) and to Romanian Ministry of Education and Research for the scientific projects support: CEEX 307/2006 and PN II 71-110/2007. The financial support of

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