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Debinding and Sintering of an Injection-Moulded Hypereutectic Al–Si Alloy
Hypereutectic Al–Si (20 wt.%) alloy parts were fabricated by employing a powder injection moulding (PIM) technique with a developed multi-component binder system composed of high-density polyethylene (35 wt.%), carnauba wax (62 wt.%) and stearic acid (3 wt.%). The feedstocks contained 83 wt.% metal...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5978184/ https://www.ncbi.nlm.nih.gov/pubmed/29772669 http://dx.doi.org/10.3390/ma11050807 |
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author | Ni, Jiaqi Yu, Muhuo Han, Keqing |
author_facet | Ni, Jiaqi Yu, Muhuo Han, Keqing |
author_sort | Ni, Jiaqi |
collection | PubMed |
description | Hypereutectic Al–Si (20 wt.%) alloy parts were fabricated by employing a powder injection moulding (PIM) technique with a developed multi-component binder system composed of high-density polyethylene (35 wt.%), carnauba wax (62 wt.%) and stearic acid (3 wt.%). The feedstocks contained 83 wt.% metal powders. The debinding process was carried out by a combination of solvent extraction and thermal decomposition. The effects of solvent debinding variables such as kind of solvents, debinding temperatures and time, and the bulk surface area to volume ratios on the debinding process were investigated. Thermal debinding and the subsequent sintering process were carried out in a heating sequence under a nitrogen atmosphere. The influences of sintering temperature and sintering time on the mechanical properties and structure were considered. Under the optimal sintering condition, sintering at 550 °C for 3 h, the final sintering parts were free of distortion and exhibited good mechanical properties. Relative sintered density, Brinell hardness, and tensile strength were ~95.5%, 58 HBW and ~154, respectively. |
format | Online Article Text |
id | pubmed-5978184 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-59781842018-05-31 Debinding and Sintering of an Injection-Moulded Hypereutectic Al–Si Alloy Ni, Jiaqi Yu, Muhuo Han, Keqing Materials (Basel) Article Hypereutectic Al–Si (20 wt.%) alloy parts were fabricated by employing a powder injection moulding (PIM) technique with a developed multi-component binder system composed of high-density polyethylene (35 wt.%), carnauba wax (62 wt.%) and stearic acid (3 wt.%). The feedstocks contained 83 wt.% metal powders. The debinding process was carried out by a combination of solvent extraction and thermal decomposition. The effects of solvent debinding variables such as kind of solvents, debinding temperatures and time, and the bulk surface area to volume ratios on the debinding process were investigated. Thermal debinding and the subsequent sintering process were carried out in a heating sequence under a nitrogen atmosphere. The influences of sintering temperature and sintering time on the mechanical properties and structure were considered. Under the optimal sintering condition, sintering at 550 °C for 3 h, the final sintering parts were free of distortion and exhibited good mechanical properties. Relative sintered density, Brinell hardness, and tensile strength were ~95.5%, 58 HBW and ~154, respectively. MDPI 2018-05-16 /pmc/articles/PMC5978184/ /pubmed/29772669 http://dx.doi.org/10.3390/ma11050807 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Ni, Jiaqi Yu, Muhuo Han, Keqing Debinding and Sintering of an Injection-Moulded Hypereutectic Al–Si Alloy |
title | Debinding and Sintering of an Injection-Moulded Hypereutectic Al–Si Alloy |
title_full | Debinding and Sintering of an Injection-Moulded Hypereutectic Al–Si Alloy |
title_fullStr | Debinding and Sintering of an Injection-Moulded Hypereutectic Al–Si Alloy |
title_full_unstemmed | Debinding and Sintering of an Injection-Moulded Hypereutectic Al–Si Alloy |
title_short | Debinding and Sintering of an Injection-Moulded Hypereutectic Al–Si Alloy |
title_sort | debinding and sintering of an injection-moulded hypereutectic al–si alloy |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5978184/ https://www.ncbi.nlm.nih.gov/pubmed/29772669 http://dx.doi.org/10.3390/ma11050807 |
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