Effects of La and Ce Addition on the Modification of Al-Si Based Alloys
This study focuses on the effects of the addition of rare earth metals (mainly lanthanum and cerium) on the eutectic Si characteristics in Al-Si based alloys. Based on the solidification curves and microstructural examination of the corresponding alloys, it was found that addition of La or Ce increa...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/5027243 |
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| author | Emad M. Elgallad Herbert W. Doty Saleh A. Alkahtani Fawzy H. Samuel |
| author_facet | Emad M. Elgallad Herbert W. Doty Saleh A. Alkahtani Fawzy H. Samuel |
| author_sort | Emad M. Elgallad |
| collection | DOAJ |
| description | This study focuses on the effects of the addition of rare earth metals (mainly lanthanum and cerium) on the eutectic Si characteristics in Al-Si based alloys. Based on the solidification curves and microstructural examination of the corresponding alloys, it was found that addition of La or Ce increases the alloy melting temperature and the Al-Si eutectic temperature, with an Al-Si recalescence of 2-3°C, and the appearance of post-α-Al peaks attributed to precipitation of rare earth intermetallics. Addition of La or Ce to Al-(7–13)% Si causes only partial modification of the eutectic Si particles. Lanthanum has a high affinity to react with Sr, which weakens the modification efficiency of the latter. Cerium, however, has a high affinity for Ti, forming a large amount of sludge. Due to the large difference in the length of the eutectic Si particles in the same sample, the normal use of standard deviation in this case is meaningless. |
| format | Article |
| id | doaj-art-af09b8cbf5b14196bba745c33ef140ee |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-af09b8cbf5b14196bba745c33ef140ee2025-08-20T03:39:04ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422016-01-01201610.1155/2016/50272435027243Effects of La and Ce Addition on the Modification of Al-Si Based AlloysEmad M. Elgallad0Herbert W. Doty1Saleh A. Alkahtani2Fawzy H. Samuel3Université du Québec à Chicoutimi, Chicoutimi, QC, G7H 2B1, CanadaGeneral Motors Materials Engineering, Pontiac, MI, USAIndustrial Engineering Program, Mechanical Engineering Department, College of Engineering, Sattam Bin Abdulaziz University, Al Kharj, Saudi ArabiaUniversité du Québec à Chicoutimi, Chicoutimi, QC, G7H 2B1, CanadaThis study focuses on the effects of the addition of rare earth metals (mainly lanthanum and cerium) on the eutectic Si characteristics in Al-Si based alloys. Based on the solidification curves and microstructural examination of the corresponding alloys, it was found that addition of La or Ce increases the alloy melting temperature and the Al-Si eutectic temperature, with an Al-Si recalescence of 2-3°C, and the appearance of post-α-Al peaks attributed to precipitation of rare earth intermetallics. Addition of La or Ce to Al-(7–13)% Si causes only partial modification of the eutectic Si particles. Lanthanum has a high affinity to react with Sr, which weakens the modification efficiency of the latter. Cerium, however, has a high affinity for Ti, forming a large amount of sludge. Due to the large difference in the length of the eutectic Si particles in the same sample, the normal use of standard deviation in this case is meaningless.http://dx.doi.org/10.1155/2016/5027243 |
| spellingShingle | Emad M. Elgallad Herbert W. Doty Saleh A. Alkahtani Fawzy H. Samuel Effects of La and Ce Addition on the Modification of Al-Si Based Alloys Advances in Materials Science and Engineering |
| title | Effects of La and Ce Addition on the Modification of Al-Si Based Alloys |
| title_full | Effects of La and Ce Addition on the Modification of Al-Si Based Alloys |
| title_fullStr | Effects of La and Ce Addition on the Modification of Al-Si Based Alloys |
| title_full_unstemmed | Effects of La and Ce Addition on the Modification of Al-Si Based Alloys |
| title_short | Effects of La and Ce Addition on the Modification of Al-Si Based Alloys |
| title_sort | effects of la and ce addition on the modification of al si based alloys |
| url | http://dx.doi.org/10.1155/2016/5027243 |
| work_keys_str_mv | AT emadmelgallad effectsoflaandceadditiononthemodificationofalsibasedalloys AT herbertwdoty effectsoflaandceadditiononthemodificationofalsibasedalloys AT salehaalkahtani effectsoflaandceadditiononthemodificationofalsibasedalloys AT fawzyhsamuel effectsoflaandceadditiononthemodificationofalsibasedalloys |