| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Gierlotka, S.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2020High Pressure Quenched Glasses: unique structures and propertiescitations
- 2019Nanocrystalline NiAl intermetallic alloy with high hardness produced by mechanical alloying and hot-pressing consolidationcitations
- 2019NiAl-B composites with nanocrystalline intermetallic matrix produced by mechanical alloying and consolidationcitations
- 2011Electrical properties and thermal stability of FePO4 glasses and nanomaterialscitations
- 2011Electrical properties vs. microstructure of nanocrystallized V2O5–P2O5 glasses — An extended temperature range studycitations
- 2011Electrical conductivity and phase transformations in the composite ionic conductors AgI : α-Al2O3 prepared via a high-pressure routecitations
- 2009Correlation between electrical properties and microstructure of nanocrystallized V2O5–P2O5 glassescitations
- 2008Electrical properties and microstructure of glassy-crystalline Ag+-ion conducting composites synthesized by a high-pressure methodcitations
- 2007Conductivity, thermal behavior and microstructure of new composites based on AgI–Ag2O–B2O3 glasses with Al2O3 matrixcitations
- 2006Conductivity and microstructure of silver borate glass/zirconia composites, prepared via a high pressure route
- 2006SiC-Zn nanocomposites obtained using the high-pressure infiltration technique
- 2006TiC Nanocrystal Formation from Carburization of Laser-Grown Ti/O/C Nanopowders for Nanostructured Ceramicscitations
- 2005Elaboration of SiC, TiC and ZrC nanopowders by laser pyrolysis : from nanoparticles to ceramic nanomaterialscitations
- 2004Chapter 13. Microwave-Driven Hydrothermal Synthesis of Oxide Nanopowders for Applications in Optoelectronicscitations
Places of action
| Organizations | Location | People |
|---|
article
NiAl-B composites with nanocrystalline intermetallic matrix produced by mechanical alloying and consolidation
Abstract
Powder mixtures with equiatomic Ni–Al stoichiometry and with the addition of 5, 10, 20 and 30 vol.% of boron were mechanically alloyed in a high-energy SPEX mill. Differential scanning calorimetry (DSC) was used for examination of the thermal behaviour of the milled powders. The mechanically alloyed powders and powders after DSC examinations were investigated by X-ray diffraction (XRD). For all the powder mixtures, a nanocrystalline NiAl intermetallic phase was formed during milling. With the increase of boron concentration in the mixtures, more intense refinement of the NiAl grain size during mechanical alloying was observed. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) examinations showed that the produced powders have composite structure, with boron particles uniformly distributed in the nanocrystalline NiAl intermetallic matrix. The density of the composite powders decreases with the increase of boron content, following the rule of mixture.The produced powders were subjected to consolidation by hot-pressing at 800 °C under the pressure of 7.7 GPa for 180 s. The produced bulk materials were investigated by XRD, SEM and EDS as well as characterised by hardness, density and open porosity measurements. It was found that during applied consolidation process the nanocrystalline structure of the NiAl matrix was maintained. The average hardness of the bulk composite samples is in the range of 10.58 – 12.6 GPa, depending on boron content, increases with the increase of boron content, and is higher than that of the NiAl intermetallic reference sample (9.53 GPa). The density of the bulk composite samples is the same as that of the corresponding powders after milling, decreases with the increase of boron content and is lower than that of the NiAl reference sample. To the best of our knowledge, the NiAl-B composites with nanocrystalline intermetallic matrix have been produced for the first time.