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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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Majumdar, Sanjib
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2019Kinetics of oxide scale growth on a (Ti, Mo)<sub>5</sub>Si<sub>3</sub> based oxidation resistant Mo-Ti-Si alloy at 900-1300<sup>∘</sup>Ccitations
- 2018Microstructure, thermo-physical, mechanical and wear properties of in-situ formed boron carbide -Zirconium diboride compositecitations
- 2018Competition between densification and microstructure development during spark plasma sintering of B4C–Eu2O3citations
- 2017Development and tribological properties of SiC fibre reinforced CrB2 compositecitations
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article
Competition between densification and microstructure development during spark plasma sintering of B4C–Eu2O3
Abstract
<p>The densification of nonoxide ceramics has been a known challenge in the field of engineering ceramics. The amount and type of sinter-aid together with sintering conditions significantly influence the densification behavior and microstructure in nonoxide ceramics. In this perspective, the present work reports the use of Eu<sub>2</sub>O<sub>3</sub> sinter-aid and spark plasma sintering towards the densification of B<sub>4</sub>C. The densification is largely influenced by the solid-state sintering reactions during heating to 1900°C. Based on the careful analysis of the heat-treated powder mixture (B<sub>4</sub>C–Eu<sub>2</sub>O<sub>3</sub>) and sintered compacts, the competitive reaction pathways are proposed to rationalize the formation of EuB<sub>6</sub> as dominant microstructural phase. An array of distinctive morphological features, including intragranular and intergranular EuB<sub>6</sub> phase as well as characteristic defect structures (asymmetric twins, stacking faults and threaded dislocations) are observed within dense B<sub>4</sub>C matrix. An attempt has been made to explain the competition between microstructure development and densification.</p>