Bioceramics; Coprecipitation synthesis; Doping; Magnesium; Microwave sintering; Strontium; β-TCP; Electronic, Optical and Magnetic Materials; Ceramics and Composites; Biomaterials; Materials Chemistry
Abstract :
[en] In this work, β-tricalcium phosphate (β-TCP) is doped with Mg2+ and Sr2+ in order to postpone the problematic β-TCP → α-TCP transition occurring from 1125 °C. Indeed, this phase transition occurs with a large lattice expansion during sintering causing microcracks and a reduced shrinkage leading to poor mechanical properties of ceramic parts. The substitution of calcium by cations like Mg2+ and Sr2+ allows to increase the temperature corresponding to β→α-TCP transition and therefore to increase the sintering temperature and achieve higher densification level. Three doping rates for each dopant individually (2.25, 4.50 and 9.00 mol%) and two co-doped compositions (2.00 mol% and 4.00 mol% of Mg2+ and Sr2+ simultaneously) were tested. Thermal and dilatometric analyses were used to evaluate the effects of Mg2+ and Sr2+ doping on the thermal stability of β-TCP. It has been shown that all doping, except the 2.25 mol% Sr-TCP, postpone the β→α transition. These results were confirmed after conventional and microwave sintering. Indeed, X-ray diffraction analyses of sintered pellets showed that the only phase present is β-TCP up to 1300 °C in all compositions except for the 2.25 mol% Sr-TCP with both sintering ways. Moreover, a higher densification rate is observed with the presence of dopants compared to undoped β-TCP according to the microstructures and relative densities close to 100%. Finally, the duration of microwave sintering is almost sixteen times shorter compared to conventional sintering allowing rapid densification with similar final relative densities and microstructures with finer grains.
Disciplines :
Chemistry
Author, co-author :
Somers, Nicolas ; Université de Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM) ; Univ. Polytechnique Hauts-de-France, EA 2443 - LMCPA - Laboratoire des Matériaux Céramiques et Procédés Associés, Valenciennes, France ; GIS TECHCERA – Groupement Intérêt Scientifique Transfrontalier sur Les Céramiques (BE -FR), France
Jean, Florian ; Univ. Polytechnique Hauts-de-France, EA 2443 - LMCPA - Laboratoire des Matériaux Céramiques et Procédés Associés, Valenciennes, France ; GIS TECHCERA – Groupement Intérêt Scientifique Transfrontalier sur Les Céramiques (BE -FR), France
Lasgorceix, Marie; Univ. Polytechnique Hauts-de-France, EA 2443 - LMCPA - Laboratoire des Matériaux Céramiques et Procédés Associés, Valenciennes, France ; GIS TECHCERA – Groupement Intérêt Scientifique Transfrontalier sur Les Céramiques (BE -FR), France ; INSA Hauts-de-France, Campus Mont Houy, Valenciennes, France
Curto, Hugo ; Univ. Polytechnique Hauts-de-France, EA 2443 - LMCPA - Laboratoire des Matériaux Céramiques et Procédés Associés, Valenciennes, France ; GIS TECHCERA – Groupement Intérêt Scientifique Transfrontalier sur Les Céramiques (BE -FR), France ; Sairem SAS, Décines-Charpieu, France
Urruth, Giovanni ; Marion Technologies, Parc Technologique Delta Sud, Verniolle, France
Thuault, Anthony ; Univ. Polytechnique Hauts-de-France, EA 2443 - LMCPA - Laboratoire des Matériaux Céramiques et Procédés Associés, Valenciennes, France ; GIS TECHCERA – Groupement Intérêt Scientifique Transfrontalier sur Les Céramiques (BE -FR), France
Petit, Fabrice; Belgian Ceramic Research Centre – Member of EMRA, Mons B, Belgium ; GIS TECHCERA – Groupement Intérêt Scientifique Transfrontalier sur Les Céramiques (BE -FR), France
Leriche, Anne; Univ. Polytechnique Hauts-de-France, EA 2443 - LMCPA - Laboratoire des Matériaux Céramiques et Procédés Associés, Valenciennes, France ; GIS TECHCERA – Groupement Intérêt Scientifique Transfrontalier sur Les Céramiques (BE -FR), France
Language :
English
Title :
Influence of dopants on thermal stability and densification of β-tricalcium phosphate powders
The authors are grateful to the “DOC 3D Printing ” project for financial support. This project has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No 764935 .The authors are also grateful to the JECS Trust for funding the visit of Nicolas Somers to the Winter Workshop organized by The American Ceramic Society from 24th to 28th January 2020 at Daytona Beach, Florida (USA) (Contract 2018 186–16).
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