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Modification of Al-Si alloys by Ce or Ce with Sr
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De Giovanni, Mario, Kaduk, James and Srirangam, Prakash (2019) Modification of Al-Si alloys by Ce or Ce with Sr. JOM, 71 (1). pp. 426-434. doi:10.1007/s11837-018-3192-6
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Official URL: http://dx.doi.org/10.1007/s11837-018-3192-6
Abstract
Al-Si alloys were modified by addition of cerium (Ce) or Ce plus strontium (Sr) to study the effect on the eutectic silicon (Si) morphology. The modified alloys were characterized using scanning electron microscopy (SEM), x-ray diffraction (XRD) analysis, and thermal analysis to understand the effect of Ce and Sr on their microstructure. The results showed that addition of 1% Ce resulted in only partial modification of the Si phase, whereas addition of Ce with 0.04% Sr resulted in complete modification of the alloy. Addition of 1% Ce decreased the eutectic arrest temperature by about 10°C, compared with a 5°C drop with Sr addition only. SEM energy-dispersive spectroscopy (EDS) and XRD results revealed formation of Al2Si2Ce intermetallic in the Ce-modified Al-Si alloys. Differential scanning calorimetry (DSC) showed that the intermetallic formed just before the eutectic phase.
| Item Type: | Journal Article | ||||||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||||
| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
| Library of Congress Subject Headings (LCSH): | Aluminum-silicon alloys, Cerium, Strontium, Eutectic alloys, Aluminum-silicon alloys -- Microstructure | ||||||||
| Journal or Publication Title: | JOM | ||||||||
| Publisher: | Springer New York LLC | ||||||||
| ISSN: | 1047-4838 | ||||||||
| Official Date: | January 2019 | ||||||||
| Dates: |
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| Volume: | 71 | ||||||||
| Number: | 1 | ||||||||
| Page Range: | pp. 426-434 | ||||||||
| DOI: | 10.1007/s11837-018-3192-6 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access |
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