Spark plasma sintering, mechanical and in-vitro behavior of a novel Sr- and Mg-containing bioactive glass for biomedical applications
| Autor: | Sebastiano Garroni, Antonio Iacomini, Damiano Angioni, Valeria Cannillo, Giacomo Cao, Devis Bellucci, Roberto Orru |
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| Rok vydání: | 2022 |
| Předmět: |
Materials science
Bioactive glasses Spark plasma sintering Nucleation Mechanical properties In-vitro tests Rietveld method Grain size Amorphous solid law.invention Chemical engineering law visual_art Bioactive glass Vickers hardness test Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Crystallization |
| Zdroj: | Journal of the European Ceramic Society. 42:1776-1783 |
| ISSN: | 0955-2219 |
| Popis: | The so-called BGMS10, a bioactive glass containing 10 mol.% SrO and 10 mol.% MgO, displays a low inclination to crystallize, as confirmed by its high activation energy (538.9 kJ/mol). Such peculiar aspect and the beneficial use of SPS allow for the obtainment of 99.7 % dense and fully amorphous products at 750 °C. The incipient crystallization in the glass is observed when temperature is increased to 850 °C, while 95 wt. % crystallized ceramics are produced at 950 °C. Main crystalline phases are α- and β-CaSiO3, with grain size of 89 and 97 nm, respectively. Glass crystallization is accompanied by Young’s modulus increase from 90.92 to 98.38 GPa. On the other hand, partially crystallized samples (850 °C) exhibit higher Vickers hardness (718.8) compared to fully crystallized ones (619.8), which show lower density (98.6%). In-vitro tests in SBF indicate that the silica-gel film preceding apatite nucleation is mostly formed on the amorphous substrate region. |
| Databáze: | OpenAIRE |
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