Chao Tan
Effects of Fe2O3 addition and annealing on the mechanical and dissolution properties of MgO- and CaO-containing phosphate glass fibres for bio-applications
Tan, Chao; Ahmed, Ifty; Parsons, Andrew J.; Zhu, Chenkai; Betanzos, Fernando B.; Liu, Xiaoling
Authors
Associate Professor IFTY AHMED ifty.ahmed@nottingham.ac.uk
Associate Professor
ANDREW PARSONS ANDREW.PARSONS@NOTTINGHAM.AC.UK
Senior Research Fellow
Chenkai Zhu
Fernando B. Betanzos
Xiaoling Liu
Abstract
This paper investigated the preparation of phosphate glass fibres (PGFs) in the following systems: i) 45P2O5-5B2O3-5Na2O-(29-x)CaO-16MgO-(x)Fe2O3and ii) 45P2O5-5B2O3-5Na2O-24CaO-(21-x)MgO-(x)Fe2O3(where x = 5, 8 and 11 mol%) for biomedical applications. Continuous fibres of 23 ± 1 μm diameter were prepared via a melt-draw spinning process. Compositions with higher Fe2O3content and higher MgO/CaO ratio required higher melting temperature and longer heating time to achieve glass melts for fibre pulling. The effects of Fe2O3 addition and annealing treatment on mechanical properties and degradation behaviours were also investigated. Adding Fe2O3 was found to increase the tensile strength from 523 ± 63 (Ca-Fe5) to 680 ± 75 MPa (Ca-Fe11), improve the tensile modulus from 72 ± 4 (Ca-Fe5) to 78 ± 3 GPa (Ca-Fe11) and decrease the degradation rate from 4.0 (Mg-Fe5) to 1.9 × 10-6kg m-2s-1(Mg-Fe11). The annealing process reduced the fibre tensile strength by 46% (Ca-Fe5), increased the modulus by 19.6% (Ca-Fe8) and decreased the degradation rate by 89.5% (Mg-Fe11) in comparison to the corresponding as-drawn fibres. Additionally, the annealing process also impeded the formation of precipitate shells and revealed coexistence of the precipitation and the pitting corrosion as fibre degradation behaviours.
Citation
Tan, C., Ahmed, I., Parsons, A. J., Zhu, C., Betanzos, F. B., & Liu, X. (2018). Effects of Fe2O3 addition and annealing on the mechanical and dissolution properties of MgO- and CaO-containing phosphate glass fibres for bio-applications. Biomedical Glasses, 4(1), https://doi.org/10.1515/bglass-2018-0006
Journal Article Type | Article |
---|---|
Acceptance Date | Apr 21, 2018 |
Publication Date | Jul 5, 2018 |
Deposit Date | Apr 24, 2018 |
Publicly Available Date | Jul 5, 2018 |
Journal | Biomedical Glasses |
Electronic ISSN | 2299-3932 |
Peer Reviewed | Peer Reviewed |
Volume | 4 |
Issue | 1 |
DOI | https://doi.org/10.1515/bglass-2018-0006 |
Keywords | Phosphate glass fibres, iron, mechanical properties, annealing, degradation |
Public URL | https://nottingham-repository.worktribe.com/output/945020 |
Publisher URL | https://www.degruyter.com/view/j/bglass.2018.4.issue-1/bglass-2018-0006/bglass-2018-0006.xml |
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0
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