| 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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Hokkanen, Ari
VTT Technical Research Centre of Finland
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2024Material engineering and application of hybrid biomimetic-de novo designed elastin-like polypeptidescitations
- 2024Respiratory rate monitoring with cellulose optical fiber
- 2022Optical properties of an organic-inorganic hybrid film made of regenerated cellulose doped with light-scattering TiO2 particlescitations
- 2022Hybrid films from cellulose nanomaterials—properties and defined optical patternscitations
- 2021Cellulose optical fiber
- 2021Cellulose optical fiber
- 2020Elastic and fracture properties of free-standing amorphous ALD Al2O3 thin films measured with bulge testcitations
- 2018Elastic and fracture properties of free-standing amorphous ALD Al2O3 thin films measured with bulge testcitations
- 2008Real-time analysis of PCR inhibition on microfluidic materialscitations
- 2007Use of brazing technique for manufacturing of high temperature fibre optical temperature and displacement transducercitations
- 2007Coating integrated optical fibres for monitoring of boiler heat transfer surfacescitations
- 2006Design and fabrication of integrated solid-phase extraction-zone electrophoresis microchipcitations
- 2006Tunable hydrophilicity on a hydrophobic fluorocarbon polymer coating on siliconcitations
Places of action
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article
Use of brazing technique for manufacturing of high temperature fibre optical temperature and displacement transducer
Abstract
In contrast to the case of embedding sensing fibres in composites, very little has been published on embedding fibres in high melting point metallic alloys. In the present work a methodology is presented for manufacturing a fibre optical displacement transducer for high temperature applications. The transducer is based on in fibre Bragg gratings that are metal embedded in a transducer body made of Inconel 600 (a refractory alloy). The fibre embedding is carried out by vacuum brazing at a temperature of 900°C using a silver based brazing alloy. This technique solves many problems in constructing the transducer. During the brazing process the brazing alloy fuses with the metallic coating on the fibre. Because of this and as a consequence of the low thermal expansion of the silica the fibre will end up in axial and radial compression when the alloy around the fibre solidifies and cools down. In the present work cross-sections of embedded fibres are presented and the distribution of elements and phases in the joint is investigated in order to identify the reactions between the brazing alloy and the Ni coating on the optical fibre. Finally, the performance of the joint is illustrated by presenting some in situ optical measurement of Bragg wavelength shifts of the embedded in fibre Bragg gratings. The stress state in a two embedded fibre gratings is also estimated from the measured wavelength shifts.