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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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Stewart, M.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (26/26 displayed)
- 2021Young's modulus of thin SmS films measured by nanoindentation and laser acoustic wavecitations
- 2020Nanomechanical behaviour of individual phases in WC-Co cemented carbides, from ambient to high temperaturecitations
- 2015High temperature measurement and characterisation of piezoelectric propertiescitations
- 2015ZnO nanorod surface modification with PDDA/PSS Bi-layer assembly for performance improvement of ZnO piezoelectric energy harvesting devicescitations
- 2014Improved performance of p-n junction-based ZnO nanogenerators through CuSCN-passivation of ZnO nanorodscitations
- 2013Finite element analysis of the vertical levitation force in an electrostatic MEMS comb drive actuatorcitations
- 2013ZnO nanogenerators - Energy generation through scavenging vibration, advantages of using a diodecitations
- 2013ZnO nanostructured diodes - Enhancing energy generation through scavenging vibrationcitations
- 2013Vertical comb drive actuator for the measurement of piezoelectric coefficients in small-scale systemscitations
- 2013Measurement techniques for piezoelectric nanogeneratorscitations
- 2013Passivation of zinc oxide nanowires for improved piezoelectric energy harvesting devicescitations
- 2012Charge redistribution in piezoelectric energy harvesterscitations
- 2012The effects of porosity, electrode and barrier materials on the conductivity of piezoelectric ceramics in high humidity and dc electric fieldcitations
- 2012Nanostructured p-n junctions for kinetic-to-electrical energy conversioncitations
- 2012Nanostructured zinc oxide piezoelectric energy generators based on semiconductor P-N junctionscitations
- 2011Electromechanical coupling and temperature-dependent polarization reversal in piezoelectric ceramicscitations
- 2011Erratum: Small-scale piezoelectric devices: Pyroelectric contributions to the piezoelectric response (Journal of Applied Physics (2010) 107 (104118))
- 2011Voltage control of the magnetic coercive field: Multiferroic coupling or artifact?citations
- 2010Temperature dependence of strain-polarization coupling in ferroelectric ceramicscitations
- 2010Pyroelectric contributions to piezoelectric hydrostatic Berlincourt methodcitations
- 2010Small-scale piezoelectric devices: Pyroelectric contributions to the piezoelectric responsecitations
- 2010Temperature dependence of high field electromechanical coupling in ferroelectric ceramicscitations
- 2010Correlation of electron backscatter diffraction and piezoresponse force microscopy for the nanoscale characterization of ferroelectric domains in polycrystalline lead zirconate titanatecitations
- 2010Properties of morphotropic phase boundary Pb(Mg1/3Nb2/3)O3-PbTiO3 films with submicron range thickness on Si based substrates
- 2010Properties of morphotropic phase boundary Pb(Mg1/3Nb2/3)O3PbTiO3 films with submicrometre range thickness on Si-based substratescitations
- 2006Manufacture and characterization of high activity piezoelectric fibrescitations
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article
Nanomechanical behaviour of individual phases in WC-Co cemented carbides, from ambient to high temperature
Abstract
<p>The dependence of the mechanical behaviour of individual phases in WC-Co on microstructural parameters such as grain size and orientation were investigated by means of nanoindentation and electron microscopy. A broad range of WC grain dimensions, from about 1 to 1000 µm<sup>2</sup>, were selected and subsequently indented to investigate any size effect. A decrease in hardness as a function of grain dimensions was observed, due to an increase in dislocation mobility in larger grains. Whilst the binder phase only exhibits a hardness of about 11 GPa, the hardness of WC grains was measured about 29 and 53 GPa for the prismatic and basal orientations, respectively, in ambient conditions. All WC orientations exhibited a similar decrease in hardness with temperature, up to 700 ˚C. Damage mechanisms occurring in WC-Co during nanoindentation were investigated for the different grain orientations at various temperatures. The damage was visualised using electron microscopy near the residual indent coupled with Focused Ion Beam (FIB) sectioning across the indent. The three-dimensional distribution of plastic deformation across multiple grains in the vicinity of an indent was examined using Electron Channelling Contrast Imaging (ECCI). ECCI micrographs enabled the observation of crystal defects, especially dislocations, and slip lines as well as the entire plastic zone. The defect density and spatial distribution in the deformed WC grains were compared to that of an untested WC grain to identify the type of deformation originating from spherical indentation. The work provides important information on the relationship between WC-Co microstructure and performance at operating temperatures.</p>