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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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Wokaun, A.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2012Relevance and formation mechanisms of negative ions upon ablation of Al 2O 3citations
- 2011Progress in in situ X-ray tomographic microscopy of liquid water in gas diffusion layers of PEFCcitations
- 2011Nanosecond and femtosecond ablation of La0.6Ca0.4CoO3: a comparison between plume dynamics and composition of the filmscitations
- 2011Pulsed laser deposition and characterisation of perovskite-type LaTiO 3− x N x thin filmscitations
- 2010Laser ablation characteristics of yttria-doped zirconia in the nanosecond and femtosecond regimescitations
- 2009Pulsed laser deposition and characterization of nitrogen-substituted SrTiO 3 thin filmscitations
- 2009Mechanisms of the laser plume expansion during the ablation of LiMn2O4citations
- 2009Mechanisms of the laser plume expansion during the ablation of LiMn 2 O 4citations
- 2008Influence of thermal diffusion on the laser ablation of thin polymer filmscitations
- 2008RF-plasma assisted pulsed laser deposition of nitrogen-doped SrTiO 3 thin filmscitations
- 2007Femtosecond and nanosecond laser damage thresholds of doped and undoped triazenepolymer thin filmscitations
- 2007Perovskite thin films deposited by pulsed laser ablation as model systems for electrochemical applicationscitations
- 2007Incubation behaviour in triazenepolymer thin films upon near-infrared femtosecond laser pulse irradiationcitations
- 2007Preparation of epitaxial La 0.6 Ca 0.4 Mn 1- x Fe x O 3 ( x = 0, 0.2) thin films: variation of the oxygen contentcitations
- 2007Preparation of epitaxial La0.6Ca0.4Mn1-xFexO3 (x=0, 0.2) thin films: Variation of the oxygen contentcitations
- 2006Structural characterization and magnetoresistance of manganates thin films and Fe-doped manganates thin filmscitations
- 2006Excimer laser forward transfer of mammalian cells using a novel triazene absorbing layercitations
- 2005Can thin perovskite film materials be applied as model systems for battery applications?citations
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article
Laser ablation characteristics of yttria-doped zirconia in the nanosecond and femtosecond regimes
Abstract
International audience ; The laser ablation characteristics of yttria-stabilized zirconia (YSZ) have been investigated as a function of the target microstructure and dopant level for different nanosecond- [ArF, KrF, and XeCl excimers; Nd:YAG (yttrium aluminum garnet) (fourth harmonic)] and femtosecond-laser sources [Ti:sapphire (fundamental and third harmonic)]. Particle ejection, which compromises the quality of coatings prepared by pulsed laser deposition (PLD), was analyzed in detail. Nanosecond-laser pulses cause a severe thermomechanical surface cracking and exfoliation of micron-sized fragments on a microsecond to millisecond time scale in the case of 8–9.5 mol % Y2O3-doped, fully stabilized zirconia (8YSZ and 9.5YSZ) targets. As a consequence of the intrinsic material brittleness, fully stabilized YSZ coatings deposited by PLD contained particles for all tested conditions. Lower doped partially stabilized zirconia (3YSZ) exhibits a superior fracture toughness attributed to a laser-induced partial transition to the monoclinic phase, detected by Raman spectroscopy, which enables the deposition of particle-free dense thin films by conventional PLD using nanosecond-UV laser radiation at moderate fluences of 1.2–1.5 J/cm2. The ablation dynamics of ultrashort laser pulses differ fundamentally from the nanosecond regime as evidenced, e.g., by time-resolved shadowgraphy and light scattering experiments. Femtosecond pulses prevent the exfoliation of micron-sized fragments but result invariably in a pronounced ejection of submicron particles. The resulting PLD coatings are porous and reveal a large surface roughness as they consist of an agglomeration of nanoparticles. Femtosecond-NIR pulses provide a factor of 2.5–10 higher material removal rates compared to nanosecond- and femtosecond-UV pulses. The ablation metrics, i.e., threshold fluence and effective absorptivity, mainly depend on the laser wavelength while the pulse duration, target microstructure, and dopant level are of minor importance. Evidence is ...