Aluminium precipitates in the primary silicon of as-spray-formed hypereutectic aluminium-silicon alloys
Precipitates have been observed in the primary silicon of as-spray-formed hypereutectic aluminium-silicon alloys with and without various alloy additions. The precipitates have been investigated using transmission electron microscopy and high-resolution transmission electron microscopy. They are alu...
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| Veröffentlicht in: | Philosophical magazine letters 2000-07, Vol.80 (7), p.477-482 |
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| creator | HOGG, S. C HETHERINGTON, C. J. D ATKINSON, H. V |
| description | Precipitates have been observed in the primary silicon of as-spray-formed hypereutectic aluminium-silicon alloys with and without various alloy additions. The precipitates have been investigated using transmission electron microscopy and high-resolution transmission electron microscopy. They are aluminium based and generally adopt a spheroidal morphology, with diameters in the range of approximately 5-10 nm, unless located on a stacking fault or grain boundary. Spray forming is a rapid solidification process and precipitation occurs because of the low solid solubility of aluminium in silicon (maximum of 0.016 plus or minus 0.003 at.% at 1190 degree C). The morphology of the precipitates suggests that they form from aluminium or aluminium-rich liquid. The orientation relationships of several precipitates in one of the primary silicon grains have been determined. |
| doi_str_mv | 10.1080/09500830050057170 |
| format | Article |
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C ; HETHERINGTON, C. J. D ; ATKINSON, H. V</creator><creatorcontrib>HOGG, S. C ; HETHERINGTON, C. J. D ; ATKINSON, H. V</creatorcontrib><description>Precipitates have been observed in the primary silicon of as-spray-formed hypereutectic aluminium-silicon alloys with and without various alloy additions. The precipitates have been investigated using transmission electron microscopy and high-resolution transmission electron microscopy. They are aluminium based and generally adopt a spheroidal morphology, with diameters in the range of approximately 5-10 nm, unless located on a stacking fault or grain boundary. Spray forming is a rapid solidification process and precipitation occurs because of the low solid solubility of aluminium in silicon (maximum of 0.016 plus or minus 0.003 at.% at 1190 degree C). The morphology of the precipitates suggests that they form from aluminium or aluminium-rich liquid. The orientation relationships of several precipitates in one of the primary silicon grains have been determined.</description><identifier>ISSN: 0950-0839</identifier><identifier>EISSN: 1362-3036</identifier><identifier>DOI: 10.1080/09500830050057170</identifier><identifier>CODEN: PMLEEG</identifier><language>eng</language><publisher>London: Taylor & Francis</publisher><subject>Applied sciences ; Cross-disciplinary physics: materials science; rheology ; Exact sciences and technology ; Materials science ; Metals. 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C</au><au>HETHERINGTON, C. J. D</au><au>ATKINSON, H. V</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Aluminium precipitates in the primary silicon of as-spray-formed hypereutectic aluminium-silicon alloys</atitle><jtitle>Philosophical magazine letters</jtitle><date>2000-07-01</date><risdate>2000</risdate><volume>80</volume><issue>7</issue><spage>477</spage><epage>482</epage><pages>477-482</pages><issn>0950-0839</issn><eissn>1362-3036</eissn><coden>PMLEEG</coden><abstract>Precipitates have been observed in the primary silicon of as-spray-formed hypereutectic aluminium-silicon alloys with and without various alloy additions. The precipitates have been investigated using transmission electron microscopy and high-resolution transmission electron microscopy. They are aluminium based and generally adopt a spheroidal morphology, with diameters in the range of approximately 5-10 nm, unless located on a stacking fault or grain boundary. Spray forming is a rapid solidification process and precipitation occurs because of the low solid solubility of aluminium in silicon (maximum of 0.016 plus or minus 0.003 at.% at 1190 degree C). The morphology of the precipitates suggests that they form from aluminium or aluminium-rich liquid. The orientation relationships of several precipitates in one of the primary silicon grains have been determined.</abstract><cop>London</cop><pub>Taylor & Francis</pub><doi>10.1080/09500830050057170</doi><tpages>6</tpages></addata></record> |
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| ispartof | Philosophical magazine letters, 2000-07, Vol.80 (7), p.477-482 |
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| source | Taylor & Francis Journals Complete; Periodicals Index Online |
| subjects | Applied sciences Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Metals. Metallurgy Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Physics Precipitation Solid-phase precipitation |
| title | Aluminium precipitates in the primary silicon of as-spray-formed hypereutectic aluminium-silicon alloys |
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