Preparation of Porous Stainless Steel Hollow-Fibers through Multi-Modal Particle Size Sintering towards Pore Engineering
The sintering of metal powders is an efficient and versatile technique to fabricate porous metal elements such as filters, diffusers, and membranes. Neck formation between particles is, however, critical to tune the porosity and optimize mass transfer in order to minimize the densification process....
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-08-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/7/3/40 |
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| author | Francois-Marie Allioux Oana David Miren Etxeberria Benavides Lingxue Kong David Alfredo Pacheco Tanaka Ludovic F. Dumée |
| author_facet | Francois-Marie Allioux Oana David Miren Etxeberria Benavides Lingxue Kong David Alfredo Pacheco Tanaka Ludovic F. Dumée |
| author_sort | Francois-Marie Allioux |
| collection | DOAJ |
| description | The sintering of metal powders is an efficient and versatile technique to fabricate porous metal elements such as filters, diffusers, and membranes. Neck formation between particles is, however, critical to tune the porosity and optimize mass transfer in order to minimize the densification process. In this work, macro-porous stainless steel (SS) hollow-fibers (HFs) were fabricated by the extrusion and sintering of a dope comprised, for the first time, of a bimodal mixture of SS powders. The SS particles of different sizes and shapes were mixed to increase the neck formation between the particles and control the densification process of the structure during sintering. The sintered HFs from particles of two different sizes were shown to be more mechanically stable at lower sintering temperature due to the increased neck area of the small particles sintered to the large ones. In addition, the sintered HFs made from particles of 10 and 44 μm showed a smaller average pore size (<1 μm) as compared to the micron-size pores of sintered HFs made from particles of 10 μm only and those of 10 and 20 μm. The novel HFs could be used in a range of applications, from filtration modules to electrochemical membrane reactors. |
| first_indexed | 2024-03-12T07:41:46Z |
| format | Article |
| id | doaj.art-994d2b8078054451ae1291be5d8f458f |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-12T07:41:46Z |
| publishDate | 2017-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-994d2b8078054451ae1291be5d8f458f2023-09-02T21:18:43ZengMDPI AGMembranes2077-03752017-08-01734010.3390/membranes7030040membranes7030040Preparation of Porous Stainless Steel Hollow-Fibers through Multi-Modal Particle Size Sintering towards Pore EngineeringFrancois-Marie Allioux0Oana David1Miren Etxeberria Benavides2Lingxue Kong3David Alfredo Pacheco Tanaka4Ludovic F. Dumée5Deakin University, Institute for Frontier Materials, Geelong, VIC 3216, AustraliaTecnalia, Energy and Environment Division, Mikeletegi Pasealekua 2, 20009 San Sebastian-Donostia, SpainTecnalia, Energy and Environment Division, Mikeletegi Pasealekua 2, 20009 San Sebastian-Donostia, SpainDeakin University, Institute for Frontier Materials, Geelong, VIC 3216, AustraliaTecnalia, Energy and Environment Division, Mikeletegi Pasealekua 2, 20009 San Sebastian-Donostia, SpainDeakin University, Institute for Frontier Materials, Geelong, VIC 3216, AustraliaThe sintering of metal powders is an efficient and versatile technique to fabricate porous metal elements such as filters, diffusers, and membranes. Neck formation between particles is, however, critical to tune the porosity and optimize mass transfer in order to minimize the densification process. In this work, macro-porous stainless steel (SS) hollow-fibers (HFs) were fabricated by the extrusion and sintering of a dope comprised, for the first time, of a bimodal mixture of SS powders. The SS particles of different sizes and shapes were mixed to increase the neck formation between the particles and control the densification process of the structure during sintering. The sintered HFs from particles of two different sizes were shown to be more mechanically stable at lower sintering temperature due to the increased neck area of the small particles sintered to the large ones. In addition, the sintered HFs made from particles of 10 and 44 μm showed a smaller average pore size (<1 μm) as compared to the micron-size pores of sintered HFs made from particles of 10 μm only and those of 10 and 20 μm. The novel HFs could be used in a range of applications, from filtration modules to electrochemical membrane reactors.https://www.mdpi.com/2077-0375/7/3/40porous stainless steel hollow-fibermetal membranemulti-modal distributionscoalescenceneck formation |
| spellingShingle | Francois-Marie Allioux Oana David Miren Etxeberria Benavides Lingxue Kong David Alfredo Pacheco Tanaka Ludovic F. Dumée Preparation of Porous Stainless Steel Hollow-Fibers through Multi-Modal Particle Size Sintering towards Pore Engineering Membranes porous stainless steel hollow-fiber metal membrane multi-modal distributions coalescence neck formation |
| title | Preparation of Porous Stainless Steel Hollow-Fibers through Multi-Modal Particle Size Sintering towards Pore Engineering |
| title_full | Preparation of Porous Stainless Steel Hollow-Fibers through Multi-Modal Particle Size Sintering towards Pore Engineering |
| title_fullStr | Preparation of Porous Stainless Steel Hollow-Fibers through Multi-Modal Particle Size Sintering towards Pore Engineering |
| title_full_unstemmed | Preparation of Porous Stainless Steel Hollow-Fibers through Multi-Modal Particle Size Sintering towards Pore Engineering |
| title_short | Preparation of Porous Stainless Steel Hollow-Fibers through Multi-Modal Particle Size Sintering towards Pore Engineering |
| title_sort | preparation of porous stainless steel hollow fibers through multi modal particle size sintering towards pore engineering |
| topic | porous stainless steel hollow-fiber metal membrane multi-modal distributions coalescence neck formation |
| url | https://www.mdpi.com/2077-0375/7/3/40 |
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