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Sintering behaviour of 45S5 bioactive glass

Abstract : In this study, we report on the effect of Bioglass® structural transformations on its sintering behaviour. In a previous paper, we showed that while heating up to 1000°C, five successive transformations occur: glassy transition, phase separation, two crystallization processes and a second glassy transition. The sintering of the material exhibits two main shrinkage stages associated to the two glassy transitions at 550°C and 850°C. At 580°C, the glass-in-glass phase separation induces a decrease of the sintering rate immediately followed by the crystallisation of the major phase Na2CaSi2O6 between 600 and 700°C, from the surface to the bulk of the particles. A completed inhibition of sintering takes place followed by a minor shrinkage due to volume crystallization. A plateau is observed until the second glassy transition.
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https://hal-emse.ccsd.cnrs.fr/emse-00508418
Contributor : Andrée-Aimée Toucas <>
Submitted on : Tuesday, August 3, 2010 - 4:06:33 PM
Last modification on : Wednesday, August 5, 2020 - 3:48:44 AM

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  • HAL Id : emse-00508418, version 1

Citation

Leila Lefebvre, Laurent Gremillard, Jérome Chevalier, Didier Bernache-Assollant. Sintering behaviour of 45S5 bioactive glass. Key Engineering Materials, Trans Tech Publications, 2008, 361-363, pp.265-268. ⟨emse-00508418⟩

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