2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 4: Recycling & Secondary Battery
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 498 pages |
| ISBN: | 978-1-987820-06-5 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Recycling of hot extruded P/M aluminium alloy 6061-SiC particle composite - interaction between SiC reinforcement particles and matrix
Jozef Kasala1;1ALEXANDER DUBCEK UNIVERSITY OF TRENCIN IN TRENCIN, Trencin, Slovakia (Slovak Republic);
Type of Paper: Regular
Id Paper: 48
Topic: 5
Abstract:
The interfacial characteristics of SiC particulate aluminium alloy matrix composites play an important role in determining the resultant composite microstructure and properties after remelting/recycling. According to the various theoretical and experimental studies, silicon carbide reacts with aluminium to form Al4C3and Si. The reaction product aluminium carbide is hygroscopic and this has detrimental effects on the properties of the composites. The objective of this paper is to study the interaction between SiC particulate and EN AW6061 aluminium alloy matrix during remelting. MMC extruded bars produced by a powder metallurgy process were mixed during remelting together with Al-Si alloys containing different amounts of silicon to increase contents of Si in aluminium alloy matrices. MMCs and Al-Si alloys were remelted in induction furnace under protective atmosphere or vacuum to guarantee homogenization of the melt. The interfacial characterizations of resultant composites after remelting were performed using scanning electron microscopy with energy dispersive spectroscopy (EDS) and wavelength dispersive spectroscopy (WDS). The distribution of the reaction product is reported. Particular attention is given to the backscattered electron images showing various phases segregated at the grain boundary regions with EDS and WDS spectra corresponding to these regions. The implications of the observed microstructural and structural details are discussed.