Pressure-Less Liquid-Phase Sintering of Aluminum-Based Materials
Rapid technological advancements and the growing focus on sustainable practices have significantly expanded the potential applications of aluminum (Al) and its alloys, leading to a steady increase in demand over the years. This study investigated the densification of Al and Al-based materials using...
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2024-12-01
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| author | Ana Teresa Sucgang Laurent Cuzacq Jean-Louis Bobet Yongfeng Lu Jean-François Silvain |
| author_facet | Ana Teresa Sucgang Laurent Cuzacq Jean-Louis Bobet Yongfeng Lu Jean-François Silvain |
| author_sort | Ana Teresa Sucgang |
| collection | DOAJ |
| description | Rapid technological advancements and the growing focus on sustainable practices have significantly expanded the potential applications of aluminum (Al) and its alloys, leading to a steady increase in demand over the years. This study investigated the densification of Al and Al-based materials using pressure-less liquid-phase sintering. Samples with 4–20 vol.% AlSi<sub>12</sub> sintered at 640 °C for 1 h achieved the highest relative density (RD) and the lowest global porosity (GP) without exhibiting any shape deformation. In general, increasing the amount of sintering aid improves the density of the samples. This was confirmed by microstructural analysis using SEM, which revealed the progression of density—from initial particle coalescence at 4 vol.% AlSi<sub>12</sub> to the development of microstructures with filled pores and well-defined grain boundaries at 20 vol.% AlSi<sub>12</sub>. X-ray diffraction (XRD) analysis also revealed an expanded lattice parameter, with minimal microstrain and a crystallite size closely resembling those of the initial Al powder. Samples with a relative density greater than 90% demonstrated thermal conductivities ranging from 170 to 200 W/mK and an average hardness of 29 HV5. Densification was further enhanced by increasing the compaction pressure from 50 MPa to 100–200 MPa for samples containing 12–20 vol.% AlSi<sub>12</sub>. The Al-based material compacted at 200 MPa and with 15 vol.% AlSi<sub>12</sub> achieved the highest RD of approximately 99%. It exhibited a thermal conductivity of 195 W/mK at 30 °C and 190 W/mK at 70 °C, along with a hardness of 30 HV5. |
| format | Article |
| id | doaj-art-427fb131e3094be7a8362a881d389dc6 |
| institution | Kabale University |
| issn | 2504-4494 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Manufacturing and Materials Processing |
| spelling | doaj-art-427fb131e3094be7a8362a881d389dc62025-01-24T13:36:24ZengMDPI AGJournal of Manufacturing and Materials Processing2504-44942024-12-0191410.3390/jmmp9010004Pressure-Less Liquid-Phase Sintering of Aluminum-Based MaterialsAna Teresa Sucgang0Laurent Cuzacq1Jean-Louis Bobet2Yongfeng Lu3Jean-François Silvain4Department of Chemistry, University of Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, 33600 Pessac, FranceDepartment of Chemistry, University of Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, 33600 Pessac, FranceDepartment of Chemistry, University of Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, 33600 Pessac, FranceDepartment of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588-0511, USADepartment of Chemistry, University of Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, 33600 Pessac, FranceRapid technological advancements and the growing focus on sustainable practices have significantly expanded the potential applications of aluminum (Al) and its alloys, leading to a steady increase in demand over the years. This study investigated the densification of Al and Al-based materials using pressure-less liquid-phase sintering. Samples with 4–20 vol.% AlSi<sub>12</sub> sintered at 640 °C for 1 h achieved the highest relative density (RD) and the lowest global porosity (GP) without exhibiting any shape deformation. In general, increasing the amount of sintering aid improves the density of the samples. This was confirmed by microstructural analysis using SEM, which revealed the progression of density—from initial particle coalescence at 4 vol.% AlSi<sub>12</sub> to the development of microstructures with filled pores and well-defined grain boundaries at 20 vol.% AlSi<sub>12</sub>. X-ray diffraction (XRD) analysis also revealed an expanded lattice parameter, with minimal microstrain and a crystallite size closely resembling those of the initial Al powder. Samples with a relative density greater than 90% demonstrated thermal conductivities ranging from 170 to 200 W/mK and an average hardness of 29 HV5. Densification was further enhanced by increasing the compaction pressure from 50 MPa to 100–200 MPa for samples containing 12–20 vol.% AlSi<sub>12</sub>. The Al-based material compacted at 200 MPa and with 15 vol.% AlSi<sub>12</sub> achieved the highest RD of approximately 99%. It exhibited a thermal conductivity of 195 W/mK at 30 °C and 190 W/mK at 70 °C, along with a hardness of 30 HV5.https://www.mdpi.com/2504-4494/9/1/4pressure-less liquid phase sintering (LPS)relative density (RD)global porosity (GP)thermal conductivity and hardnessAl and Al-based materials |
| spellingShingle | Ana Teresa Sucgang Laurent Cuzacq Jean-Louis Bobet Yongfeng Lu Jean-François Silvain Pressure-Less Liquid-Phase Sintering of Aluminum-Based Materials Journal of Manufacturing and Materials Processing pressure-less liquid phase sintering (LPS) relative density (RD) global porosity (GP) thermal conductivity and hardness Al and Al-based materials |
| title | Pressure-Less Liquid-Phase Sintering of Aluminum-Based Materials |
| title_full | Pressure-Less Liquid-Phase Sintering of Aluminum-Based Materials |
| title_fullStr | Pressure-Less Liquid-Phase Sintering of Aluminum-Based Materials |
| title_full_unstemmed | Pressure-Less Liquid-Phase Sintering of Aluminum-Based Materials |
| title_short | Pressure-Less Liquid-Phase Sintering of Aluminum-Based Materials |
| title_sort | pressure less liquid phase sintering of aluminum based materials |
| topic | pressure-less liquid phase sintering (LPS) relative density (RD) global porosity (GP) thermal conductivity and hardness Al and Al-based materials |
| url | https://www.mdpi.com/2504-4494/9/1/4 |
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