Effects of sintering schedule on the characteristics of fe-based powder compacts formed through warm compaction route
This paper presents the sintering characteristics of Fe-based powder compacts formed through the warm compaction method. Iron powder ASC100.29 (73 wt%), chromium powder (22 wt%), and aluminium powder (5 wt%) were mixed mechanically for 60 mins in preparing the feedstock. The powder mixture was subse...
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my.uniten.dspace-75292018-01-11T09:52:14Z Effects of sintering schedule on the characteristics of fe-based powder compacts formed through warm compaction route Rahman, M.M. Rosli, M.H. Namasivayam, D. This paper presents the sintering characteristics of Fe-based powder compacts formed through the warm compaction method. Iron powder ASC100.29 (73 wt%), chromium powder (22 wt%), and aluminium powder (5 wt%) were mixed mechanically for 60 mins in preparing the feedstock. The powder mixture was subsequently compacted at 200°C through simultaneous loading of 325 MPa from upper and lower punches. The defectfree green compacts were then sintered in an argon gas fired furnace at a rate of 10°C/min by varying the sintering time (30, 60, and 90 mins) and temperature (600, 750, and 900°C), respectively. The sintered samples were characterized through physical and mechanical properties and their microstructures were analysed through scanning electron microscopy. The results revealed that sintering at 900°C for 90 mins contributed to the highest volumetric expansion and relative density change, which are not expected in the powder metallurgy industries. A moderate sintering temperature of 750°C for a holding time of 60 mins was found to produce a sintered sample with higher bending strength. In these sintering conditions, better dispersion of the alloyed elements is also observed. © Universiti Malaysia Pahang Publishing. 2018-01-11T09:52:14Z 2018-01-11T09:52:14Z 2016 http://dspace.uniten.edu.my/jspui/handle/123456789/7529 |
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This paper presents the sintering characteristics of Fe-based powder compacts formed through the warm compaction method. Iron powder ASC100.29 (73 wt%), chromium powder (22 wt%), and aluminium powder (5 wt%) were mixed mechanically for 60 mins in preparing the feedstock. The powder mixture was subsequently compacted at 200°C through simultaneous loading of 325 MPa from upper and lower punches. The defectfree green compacts were then sintered in an argon gas fired furnace at a rate of 10°C/min by varying the sintering time (30, 60, and 90 mins) and temperature (600, 750, and 900°C), respectively. The sintered samples were characterized through physical and mechanical properties and their microstructures were analysed through scanning electron microscopy. The results revealed that sintering at 900°C for 90 mins contributed to the highest volumetric expansion and relative density change, which are not expected in the powder metallurgy industries. A moderate sintering temperature of 750°C for a holding time of 60 mins was found to produce a sintered sample with higher bending strength. In these sintering conditions, better dispersion of the alloyed elements is also observed. © Universiti Malaysia Pahang Publishing. |
format |
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author |
Rahman, M.M. Rosli, M.H. Namasivayam, D. |
spellingShingle |
Rahman, M.M. Rosli, M.H. Namasivayam, D. Effects of sintering schedule on the characteristics of fe-based powder compacts formed through warm compaction route |
author_facet |
Rahman, M.M. Rosli, M.H. Namasivayam, D. |
author_sort |
Rahman, M.M. |
title |
Effects of sintering schedule on the characteristics of fe-based powder compacts formed through warm compaction route |
title_short |
Effects of sintering schedule on the characteristics of fe-based powder compacts formed through warm compaction route |
title_full |
Effects of sintering schedule on the characteristics of fe-based powder compacts formed through warm compaction route |
title_fullStr |
Effects of sintering schedule on the characteristics of fe-based powder compacts formed through warm compaction route |
title_full_unstemmed |
Effects of sintering schedule on the characteristics of fe-based powder compacts formed through warm compaction route |
title_sort |
effects of sintering schedule on the characteristics of fe-based powder compacts formed through warm compaction route |
publishDate |
2018 |
url |
http://dspace.uniten.edu.my/jspui/handle/123456789/7529 |
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1644494222477230080 |
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13.164666 |