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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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Shukla, P. P.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2011Mathematical modelling of the fibre laser surface processing of a zirconia engineering ceramic by means of three-dimensional finite element analysiscitations
- 2011Characterization and compositional study of a ZrO2 engineering ceramic irradiated with a fibre laser beamcitations
- 2011Influence of laser beam brightness during surface treatment of a ZrO2 engineering ceramic
- 2011Distribution of temperature during fibre laser radiation and the effects on the phase transformation of ZrO2 engineering ceramiccitations
- 2011Modification of fracture toughness parameter K1c following CO2 laser surface treatment of Si3N4 engineering ceramiccitations
- 2011Evaluation of fracture toughness of ZrO2 and Si3N4 engineering ceramics following CO2 and fibre laser surface treatmentcitations
- 2011Examination of temperature distribution and the thermal effects on Si3N4 engineering ceramics during fibre laser surface treatmentcitations
- 2010Fracture toughness modification by using a fibre laser surface treatment of a silicon nitride engineering ceramiccitations
- 2010On the establishment of an appropriate method for evaluating the residual stresses after laser surface treatment of ZrO2 and Si3N4 engineering ceramics
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article
Characterization and compositional study of a ZrO2 engineering ceramic irradiated with a fibre laser beam
Abstract
Fibre laser surface treatment (FLST) of a cold isostatic pressed (CIP) ZrO<sub>2</sub> engineering ceramic (ZEC) was performed using various processing gas compositions. This is the first time that a surface treatment of ZEC has been employed hitherto by using the fibre laser (FL) radiation to observe the changes on and within the surface of the engineering ceramic; in particular, material removal, surface topography, chemical composition, changes in the surface hardness and distribution of the heat affected zone (HAZ). Bonding of the grain boundaries was found through surface melting with all FL irradiated samples to some extent, but the effect was more marked on the sample FL irradiated with an Ar assist gas and proved to be the most effective combination for modifying the surface morphology. The surface finish and the material removal were varied with the changes in the gas composition. Maximum material removal was observed when an O<sub>2</sub> assist gas was employed on account of the O<sub>2</sub> generating an exothermic reaction. This in turn, produced excessive heating. The compositional analysis revealed a chemical change occurring within the FL irradiated surfaces, regardless of the assist gas used, with the ZEC transforming to zirconia carbide (ZrC).