Speedy bioceramics: Rapid densification of tricalcium phosphate by ultrafast high-temperature sintering
Autor: | Milad Kermani, Antonella Motta, Vaclav Tyrpekl, Monika Vilémová, Salvatore Grasso, Anna Galotta, Vincenzo M. Sglavo, Jiřina Vontorová, Mattia Biesuz |
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Rok vydání: | 2021 |
Předmět: |
Calcium Phosphates
Ceramics Materials science Hot Temperature chemistry.chemical_element Sintering Bioengineering Biocompatible Materials 02 engineering and technology Calcium 010402 general chemistry 01 natural sciences Biomaterials chemistry.chemical_compound Electrical current Materials Testing Ceramic Graphite Pressing Temperature 021001 nanoscience & nanotechnology 0104 chemical sciences Calcium carbonate chemistry Chemical engineering Mechanics of Materials visual_art visual_art.visual_art_medium 0210 nano-technology Ultrashort pulse |
Zdroj: | Materials scienceengineering. C, Materials for biological applications. 127 |
ISSN: | 1873-0191 |
Popis: | Due to unique osteogenic properties, tricalcium phosphate (TCP) has gained relevance in the field of bone repair. The development of novel and rapid sintering routes is of particular interest since TCP undergoes to high-temperature phase transitions and is widely employed in osteoconductive coatings on thermally-sensitive metal substrates. In the present work, TCP bioceramics was innovatively obtained by Ultrafast High-temperature Sintering (UHS). Ca-deficient hydroxyapatite nano-powder produced by mechanochemical synthesis of mussel shell-derived calcium carbonate was used to prepare the green samples by uniaxial pressing. These were introduced within a graphite felt which was rapidly heated by an electrical current flow, reaching heating rates exceeding 1200 °C min−1. Dense (> 93%) ceramics were manufactured in less than 3 min using currents between 25 and 30 A. Both β and α-TCP were detected in the sintered components with proportions depending on the applied current. Preliminary tests confirmed that the artifacts do not possess cytotoxic effects and possess mechanical properties similar to conventionally sintered materials. The overall results prove the applicability of UHS to bioceramics paving the way to new rapid processing routes for biomedical components. |
Databáze: | OpenAIRE |
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