| People | Locations | Statistics |
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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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Kulczyk, Mariusz
Institute of High Pressure Physics
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (36/36 displayed)
- 2023Effect of microstructure refinement of pure copper on improving the performance of electrodes in electro discharge machining (EDM)citations
- 2022Increasing the Mechanical Strength and Corrosion Resistance of Aluminum Alloy 7075 via Hydrostatic Extrusion and Agingcitations
- 2022The impact of severe plastic deformations obtained by hydrostatic extrusion on the machinability of ultrafine-grained Ti grade 2 intended for fastenerscitations
- 2022The Influence of Heat Treatment on the Mechanical Properties and Corrosion Resistance of the Ultrafine-Grained AA7075 Obtained by Hydrostatic Extrusioncitations
- 2022Influence of Strain Rates during Severe Plastic Strain Processes on Microstructural and Mechanical Evolution in Pure Zinccitations
- 2021Mechanical Reinforcement of Polyamide 6 by Cold Hydrostatic Extrusioncitations
- 2021Influence of Hydrostatic Extrusion on the Mechanical Properties of the Model Al-Mg Alloyscitations
- 2021Microstructural Investigation of a Friction-Welded 316L Stainless Steel with Ultrafine-Grained Structure Obtained by Hydrostatic Extrusioncitations
- 2020The analysis of microstructure and texture evolution in polycrystal and single crystals of nickel after hydrostatic extrusion processcitations
- 2019Microstructure and texture development in a polycrystal and different aluminium single crystals subjected to hydrostatic extrusioncitations
- 2019Anisotropy of mechanical and structural properties in AA 6060 aluminum alloy following hydrostatic extrusion processcitations
- 2019Texture, residual stresses and mechanical properties analysis in the commercial 1.4462 duplex stainless steel subjected to hydrostatic extrusioncitations
- 2019The influence of combined hydrostatic extrusion and rolling on the microstructure, texture and mechanical properties of Al-Li alloyscitations
- 2018Method Of Producing High-strength Rods Of Austenitic Steel And A Rod Produced By Such Method
- 2018Effect of Severe Plastic Deformation Realized by Hydrostatic Extrusion on Heat Transfer in CP Ti Grade 2 and 316L Austenitic Stainless Steelcitations
- 2018Precipitation and mechanical properties of UNS 2205 duplex steel subjected to hydrostatic extrusion after heat treatmentcitations
- 2018The effect of microstructure anisotropy on low temperature fracture of ultrafine-grained ironcitations
- 2018Fatigue behavior of 6xxx aluminum alloy processed by severe plastic deformation
- 2018Enhanced strength and electrical conductivity of ultrafine-grained Al-Mg-Si alloy processed by hydrostatic extrusioncitations
- 2018Low-Temperature Fracture of Ultrafine-Grained Iron
- 2017Method Of Producing High-strengh Rods Of Austenitic Steel And A Rod Produced By Such A Method
- 2017Mechanical properties and corrosion resistance of ultrafine grained austenitic stainless steel processed by hydrostatic extrusioncitations
- 2017Influence of hydrostatic extrusion process on the microstructure and texture of polycrystalline nickelcitations
- 2017Consolidation of Nanocrystalline Nd-Fe-B Powder by Hydrostatic Extrusion at High Temperaturecitations
- 2017The effect of deformation degree on the microstructure of the 6060 aluminium alloy
- 2016Method Of Producing High-strengh Rods Of Austenitic Steel And A Rod Produced By Such A Method
- 2016Microstructure evolution and texture development in a Cu-8.5%at. Al material subjected to hydrostatic extrusioncitations
- 2015Method Of Producing High-strength Rods Of Austenitic Steel And A Rod Produced By Such Method
- 2015Method Of Producing High-strengh Rods Of Austenitic Steel And A Rod Produced By Such A Method
- 2015Microstructure and Texture of Hydrostatic Extrusion Deformed Ni Single Crystals and Polycrystalcitations
- 2014Enhancement of mechanical properties of biocompatible Ti-45Nb alloy by hydrostatic extrusioncitations
- 2014Method Of Producing High-strengh Rods Of Austenitic Steel And A Rod Produced By Such A Method
- 2013The strength and ductility of 5483 aluminium alloy processed by various SPD methodscitations
- 2012Microstructure and mechanical properties of fine-grained iron processed by hydroextrusion
- 2006The influence of hydrostatic extrusion on the microstructure of 6082 aluminium alloy
- 2005Microstructure and mechanical properties of nickel deformed by hydrostatic extrusion
Places of action
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article
Consolidation of Nanocrystalline Nd-Fe-B Powder by Hydrostatic Extrusion at High Temperature
Abstract
Hydrostatic extrusion is a modern method of shaping material microstructure and properties. Hydrostatic extrusion can also be successfully used for consolidation of hard magnetic powders. The effect of extrusion temperature, within the range of 700-800°C, on the magnetic properties of the bulk, final product was studied. A commercial MQU-F42 powder, dedicated to hot pressing, was placed in copper capsules and initially cold compacted up to 60% of the theoretical density. Subsequently, the billet was heated in an oven to temperatures 700 and 800°C, respectively and subjected to hydrostatic extrusion. The extruded product had a form of a copper rod, with the Nd-Fe-B core, having 96% of theoretical density (true strain 1.85 after extrusion at 800°C). The extrusion process led to deterioration of the coercivity, for which coarsening of the Nd₂Fe₁₄B grains was blamed. In order to prove this hypothesis, the starting powder was annealed in a temperature range of 550-900°C for various times. The crystallite size, measured after annealing by the X-ray diffraction method, showed that with extension of time and elevation of the temperature the crystallite size increases, however the dominating parameter is the temperature. Correlation of the crystallite size with temperature indicates that when the crystallites are larger than 80 nm the magnetic properties dramatically decrease. Additionally, after HE at 800°C micrometric size Nd-rich phase appear in the microstructure. The Nd is squeezed from the grain boundary of the Nd₂Fe₁₄B phase leading to non-isolated grains, which also contributes to the deterioration of the coercivity.