SiO2-MgO-3CaO center dot P2O5-K2O glasses and glass-ceramics: Effect of crystallisation on the adhesion of SBF apatite layers
authors Queiroz, CM; Frade, JR; Fernandes, MHV
editors Barbosa, MA; Monteiro, FJ; Correia, R; Leon, B
nationality International
journal BIOCERAMICS, VOL 16
author keywords glass-ceramics; crystallisation; adhesion; apatite layer; scratch test; bioactivity
keywords BIOCERAMICS
abstract In this work glasses with nominal molar compositions 0.45SiO(2)-(0.45-x)MgO-xK(2)O-0.1(3CaO.P2O5) (x=0 and 0.09) were heat-treated according to adequate time-temperature schedules to obtain glass-ceramics (GCs) with phosphate phases. The GCs were immersed for different periods of time in SBF at 37degreesC. The morphology, crystallinity, and adhesion of the apatite layers thus formed are compared and discussed for the glasses and the GCs. Adhesion measurements were performed for the GCs using the scratch test technique. Distinct adhesion behaviours of the newly formed apatite layers to the substrate were observed when the GCs composition is K-free or when it contains K. Adhesion parameters for the apatite coating on the K-containing GCs showed to be affected by the immersion time in SBF but were not time-dependent in the case of the K-free GCs.
publisher TRANS TECH PUBLICATIONS LTD
issn 1013-9826
isbn 0-87849-932-6
year published 2004
volume 254-2
beginning page 155
ending page 158
web of science category Engineering, Biomedical; Materials Science, Ceramics; Materials Science, Biomaterials; Materials Science, Composites
subject category Engineering; Materials Science
unique article identifier WOS:000189415000039
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