Sintering behaviour of 45S5 bioactive glass
Autor: | Laurent Gremillard, Jérôme Chevalier, L. Lefebvre, Rachid Zenati, D. Bernache-Assolant |
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Přispěvatelé: | Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Mateis, Laboratoire |
Jazyk: | angličtina |
Rok vydání: | 2008 |
Předmět: |
Ceramics
Materials science Surface Properties Kinetics Biomedical Engineering Sintering Biocompatible Materials 02 engineering and technology Porous glass [SPI.MAT] Engineering Sciences [physics]/Materials 01 natural sciences Biochemistry law.invention [SPI.MAT]Engineering Sciences [physics]/Materials Biomaterials X-Ray Diffraction law Phase (matter) 0103 physical sciences Materials Testing Crystallization Molecular Biology Shrinkage 010302 applied physics Models Statistical Metallurgy Temperature General Medicine Equipment Design 021001 nanoscience & nanotechnology Chemical engineering Bioactive glass Glass Powders 0210 nano-technology Glass transition Porosity Biotechnology |
Zdroj: | Acta Biomaterialia Acta Biomaterialia, Elsevier, 2008, pp.1894-1903 |
ISSN: | 1742-7061 |
Popis: | In this study, we report on the effect of Bioglass structural transformations on its sintering behaviour. While heating up to 1000 degrees C, five successive transformations occur: glass transition, glass-in-glass phase separation, two crystallization processes and a second glass transition. The sintering of the material exhibits two main shrinkage stages associated with the two glass transitions at 550 and 850 degrees C. At 580 degrees C, the glass-in-glass phase separation induces a decrease in the sintering rate immediately followed by the major crystalline phase crystallization (Na(2)CaSi(2)O(6)) between 600 and 700 degrees C, from the surface to the bulk of the particles. A complete inhibition of sintering takes place followed by a minor shrinkage effect due to crystallization. A plateau is then observed until the second glass transition temperature is reached. A modification of Frenkel's model allows the determination of the glass-in-glass phase separation kinetics and the identification of the structural transformations effects on sintering behaviour. |
Databáze: | OpenAIRE |
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