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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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Kain, Vivekanand
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Topics
Publications (6/6 displayed)
- 2018Microstructure, thermo-physical, mechanical and wear properties of in-situ formed boron carbide -Zirconium diboride compositecitations
- 2018Tribology study on TiB2+WSi2 composite against WCcitations
- 2017Wear behaviour of CrB2 + 5 wt.% MoSi2 composite against cemented tungsten carbide (WC-Co) under dry reciprocative sliding conditioncitations
- 2017Sintering and oxidation of GdB4 synthesized by B4C reduction methodcitations
- 2017Development and tribological properties of SiC fibre reinforced CrB2 compositecitations
- 2017Scratch Testing of Hot-Pressed Monolithic Chromium Diboride (CrB2) and CrB2 + MoSi2 Compositecitations
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article
Sintering and oxidation of GdB4 synthesized by B4C reduction method
Abstract
<p>Gadolinium tetraboride (GdB4) was synthesized by reduction of Gd2O3 using boron carbide in presence of carbon. Effect of temperature on product quality was investigated. Pure GdB4 powder was obtained in vacuum at 1500oC. Pressureless sintering experiments revealed that sintering takes place only above 1600oC. A maximum density of 77.1% of the theoretical value was obtained at 1800oC by pressureless sintering. Hot pressing resulted in 95.5% of theoretical density at the lower temperature of 1700oC under 35 MPa pressure. Hardness and fracture toughness of dense GdB4 were measured and found to be 21.4 GPa and 2.3 MPa·m1/2, respectively. After exposure to air at 900oC, the formation of a porous and non-protective oxide layer was observed.</p>