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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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Torralba, José Manuel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2024Enhancement of γ/γ’ Microstructured Cobalt Superalloys Produced from Atomized Powder by Creating a Harmonic Structurecitations
- 2019Experimental and numerical analysis of effects of supercritical carbon dioxide debinding on Inconel 718 MIM componentscitations
- 2018Improving kinetics of MIM process by applying new methods of debinding and sintering
- 2017Unconventional methods of sintering Inconel 718 MIM samplescitations
- 2016Field assisted hot pressing of sintering Inconel 718 MIM samplescitations
- 2016Unconventional methods of sintering Inconel 718 MIM samplescitations
- 2014Mechanical and functional properties of Invar alloy for µ-MIM
- 2014Effect of processing conditions on microstructural features in Mn&-Si sintered steelscitations
- 2004Aluminium Matrix Composites Reinforced with Si3N4, AlN and ZrB2, Produced by Conventional Powder Metallurgy and Mechanical Alloying
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document
Aluminium Matrix Composites Reinforced with Si3N4, AlN and ZrB2, Produced by Conventional Powder Metallurgy and Mechanical Alloying
Abstract
The homogeneous distribution of the reinforcement phase is a prime requisite for a composite material to present its superior performance. Powder metallurgy can produce composite materials in the whole range of matrix reinforcement composition, without the segregation typical of the casting process, and mechanical alloying serves to optimise the particle mixing stage, enhancing the reinforcement distribution. This work investigates the use of mechanical alloying plus hot extrusion to obtain Al6061 matrix composites reinforced with Si3N4, AlN and ZrB2, and compares the result with the same composite materials obtained by more conventional powder metallurgy techniques. The incorporation of the reinforcement does not suffice to produce a significant improvement of the mechanical properties of the conventional powder metallurgy composites. Mechanical alloying breaks the reinforcement particle clusters, eliminates most of the defects present in these particles, decreases their size and enhances their distribution, which together with the metallurgical phenomena that change the metallic matrix, such as work hardening and oxide and carbide dispersion, produces an increase of about 150% in the hardness of the powder, when compared with the hardness of the as-received, non-reinforced aluminium powder alloy; and of 100% in the hardness and ultimate tensile strength of the consolidated materials, when compared with material of same composition processed by conventional powder metallurgy.