| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Stamboulis, Artemis
Imperial College London
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (27/27 displayed)
- 2023A Novel Approach for Powder Bed Fusion of Ceramics Using Two Laser Systemscitations
- 2022Processing and interpretation of core‐electron XPS spectra of complex plasma‐treated polyethylene‐based surfaces using a theoretical peak model
- 2021Antimicrobial bioceramics for biomedical applicationscitations
- 2021An Overview of Sputtering Hydroxyapatite for BiomedicalApplicationcitations
- 2019Mechanical testing of antimicrobial biocomposite coating on metallic medical implants as drug delivery systemcitations
- 2017Types of ceramics: Material classcitations
- 2017Types of ceramics : material class
- 2015Nano-hydroxyapatite deposition on titanium using peptide aptamers
- 2015Functionalization of biomedical surfaces by peptide aptamers
- 2014Electrospun Fibres of Polyhydroxybutyrate Synthesized by Ralstonia eutropha from Different Carbon Sourcescitations
- 2014Electrospun Fibres of Polyhydroxybutyrate Synthesized by Ralstonia eutropha from Different Carbon Sourcescitations
- 2014Use of inter-fibril spaces among electrospun fibrils as ion-fixation and nano-crystallization
- 2014Nanoclay addition to a conventional glass ionomer cementscitations
- 2014Electrospun fibres of polyhydroxybutyrate synthesized by ralstonia eutropha from different carbon sourcescitations
- 2014Effect of nanoclay dispersion on the properties of a commercial glass ionomer cementcitations
- 2013Sol-Gel Preparation of Silica-Based Nano-Fibers for Biomédical Applications
- 2013Active screen plasma nitriding enhances cell attachment to polymer surfacescitations
- 2013Nitrogen plasma surface modification enhances cellular compatibility of aluminosilicate glasscitations
- 2012Durability and reliability of medical polymerscitations
- 2011An X-ray micro-fluorescence study to investigate the distribution of Al, Si, P and Ca ions in the surrounding soft tissue after implantation of a calcium phosphate-mullite ceramic composite in a rabbit animal modelcitations
- 2010Effect of active screen plasma nitriding on the biocompatibility of UHMWPE surfaces
- 2008Solid state MAS-NMR and FTIR study of barium containing alumino-silicate glasses
- 2007Real-time nucleation and crystallisation studies of a fluorapatite glass-ceramics using small-angle neutron scattering and neutron diffractioncitations
- 2007Structural characterization of ionomer glasses by multinuclear solid state MAS-NMR spectroscopycitations
- 2006The influence of montmorillonite clay reinforcement on the performance of a glass ionomer restorativecitations
- 2006Real Time Neutron Diffraction Studies of apatite glass ceramicscitations
- 2002Mechanical properties of biodegradable polymer sutures coated with bioactive glasscitations
Places of action
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article
Real-time nucleation and crystallisation studies of a fluorapatite glass-ceramics using small-angle neutron scattering and neutron diffraction
Abstract
Real-time small-angle neutron scattering (SANS) and neutron diffraction (ND) studies have been performed on a calcium fluorapatite (Ca-5(PO4)(3)F) (FAP) glass-ceramic composition. The cast glass exhibited scattering at low q and a peak in I(q) at higher q. The scattering at low q is thought to arise from a larger-scale nucleated structure, while the peak in I(q) is thought to arise from a finer spinodally decomposed structure. High temperature viscoelastic measurements show two reductions in the storage modulus (E') and two peaks in the damping factor (tan delta) consistent with a glass that has undergone amorphous phase separation (APS) during the casting process. On heating to 780 degrees C, the scattering at low q increased in intensity, while the peak in I(q) increased in intensity and moved to lower q, consistent with the coarsening of the finer scale phase separated structure. During isothermal experiments, the scattering at low q increased in intensity and the peak in I(q) moved to lower q, corresponding to a final spacing of about 35 nm. After about 30 min at 740 degrees C, and 12 min at 750 degrees C the coarsening process effectively stopped and is inhibited by the glass transition temperature (T-g) of the second glass phase. ND showed the glass to crystallize on heating to FAP and then mullite (2SiO(2).3Al(2)O(3)). At high temperatures, both the FAP and mullite crystal phases partially re-dissolved, but were found to re-crystallize rapidly on subsequent cooling. The results indicate that the proposed crystal growth hold is actually a crystal dissolution hold, with re-crystallization occurring rapidly on cooling. The results indicate that it is important to control not only the heat-treatment cycle but also the cooling cycle.