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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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Shahzad, Khuram
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Exchange bias behaviour in cobalt ferrite-cobalt oxide CoFe<sub>2</sub>O<sub>4</sub>/CoO nanocomposites for data storage applicationscitations
- 2016Shaping ceramics through indirect selective laser sinteringcitations
- 2014Indirect selective laser sintering of alumina
- 2014Comparison of different powder metallurgy processes to produce alumina parts through indirect Selective Laser Sintering
- 2014Additive manufacturing of zirconia parts by indirect selective laser sinteringcitations
- 2013Additive manufacturing of alumina parts by indirect selective laser sintering and post processingcitations
- 2013Polystyrene-coated alumina powder via dispersion polymerization for indirect selective laser sintering applicationscitations
- 2013Densification and Geometrical Assessments of Alumina Parts Produced Through Indirect Selective Laser Sintering of Alumina-Polystyrene Composite Powdercitations
- 2012Preparation and indirect selective laser sintering of alumina/PA microspherescitations
- 2012Isostatic pressing assisted indirect selective laser sintering of alumina componentscitations
- 2012Density improvement of alumina parts produced through selective laser sintering of alumina-polyamide composite powdercitations
- 2012Fabrication of high density alumina parts by indirect selective laser sintering
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article
Isostatic pressing assisted indirect selective laser sintering of alumina components
Abstract
Purpose – The purpose of this paper is to assess a new powder metallurgy process to make alumina parts through indirect Selective Laser Sintering (SLS). Density measurements, some geometrical assessments and scanning electron microscopy (SEM) microstructural analyses are performed after each stage of the process, allowing to provide an objective overview of the challenges and possibilities for the processing of high density technical ceramic parts through SLS of ball milled alumina/polyamide powder agglomerates. Design/methodology/approach –The powder production by ball milling, SLS, cold isostatic pressing (CIP) or quasi isostatic pressing (QIP), debinding and sintering (FS) stages of the powder metallurgy process were sequentially investigated. Findings – Alumina parts with a density up to 94.1% could be produced by a powder metallurgy process containing an SLS step. Microstructural investigation of the sintered samples reveals an alumina matrix with a grain size of ~5 µm and two different kind of pore morphologies, i.e. long elongated pores, which stem from the intergranular spacings during SLS, and intermediate pores, which likely originate from larger polyamide agglomerates in the ball milled powder. Besides, QIPing at elevated temperatures is found to be a promising alternative for CIPing at room temperature to increase the final part density. Research limitations/implications – Cracks, long elongated pores and intermediate pores remained in the sintered parts. Homogenizing the microstructure of the parts through optimizing the composite starting powder, the deposition during SLS, the SLS parameters and QIPing parameters is essential to overcome these limitations. Practical implications – Homogenizing the starting powder mixture and the microstructure of the SLS material is the key issue for producing ceramic parts through indirect SLS. Originality/value – Indirect SLS of ceramics has hardly been reported and the combined use of SLS and QIPing is innovative in the field of indirect SLS of ceramics. ...