Use of nano-structured silanols on the solidification of aluminum-silicon based casting alloys

Andre Lee, Yang Lu, Allen Roche, Tsung Yu Pan

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Minor alloying elements had been used to modify the solidification process leading to improve mechanical performance of Aluminum casting alloys. However, difficulties in balancing strength, ductility and the subsequent precipitation strengthening heat treatment remain. In this study, use of nano-structured silanols based on partially-condensed polyhedral oligomeric silsequioxanes (POSS-silanol) was examined. The silanols react with active aluminum surface to form stable Si-O-Al bonds, while cage-like POSS core enables control of subsequent solidification process leading desired mechanical performance. Specifically, trisilanol phenyl POSS modifier was added to the casting alloy A4047. Using standard casting approach, a highly refined fine fibrous of eutectic Al-Si formed instead of the irregular flakes, which lead to a significant improvement in its ductility while improve the tensile strength as compared to the unmodified A4047. This newly developed approach was expanded to other heat-treatable casting aluminum alloys with specific interest on changes in the eutectic Al-Si microstructure.

    Original languageEnglish (US)
    Title of host publicationLight Metals 2015 - At the TMS 2015 Annual Meeting and Exhibition
    PublisherMinerals, Metals and Materials Society
    Pages375-377
    Number of pages3
    Volume2015-January
    ISBN (Electronic)9781119082446
    StatePublished - 2015
    EventLight Metals 2015 - TMS 2015 Annual Meeting and Exhibition - Orlando, United States

    Other

    OtherLight Metals 2015 - TMS 2015 Annual Meeting and Exhibition
    CountryUnited States
    CityOrlando
    Period3/15/153/19/15

    Profile

    Casting
    Solidification
    Cortical Synchronization
    Fingersucking
    solidification
    aluminum
    Eutectics
    Ductility
    Aluminum
    Cardanolides
    ductility
    eutectics
    Aluminum castings
    Strengthening (metal)
    Alloying elements
    Aluminum alloys
    Tensile strength
    Heat treatment
    Silicon
    Microstructure

    Keywords

    • Cast Aluminum alloy
    • Nanostructured silanols
    • Solidification

    ASJC Scopus subject areas

    • Metals and Alloys
    • Materials Chemistry
    • Condensed Matter Physics

    Cite this

    Lee, A., Lu, Y., Roche, A., & Pan, T. Y. (2015). Use of nano-structured silanols on the solidification of aluminum-silicon based casting alloys. In Light Metals 2015 - At the TMS 2015 Annual Meeting and Exhibition (Vol. 2015-January, pp. 375-377). Minerals, Metals and Materials Society.

    Use of nano-structured silanols on the solidification of aluminum-silicon based casting alloys. / Lee, Andre; Lu, Yang; Roche, Allen; Pan, Tsung Yu.

    Light Metals 2015 - At the TMS 2015 Annual Meeting and Exhibition. Vol. 2015-January Minerals, Metals and Materials Society, 2015. p. 375-377.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Lee, A, Lu, Y, Roche, A & Pan, TY 2015, Use of nano-structured silanols on the solidification of aluminum-silicon based casting alloys. in Light Metals 2015 - At the TMS 2015 Annual Meeting and Exhibition. vol. 2015-January, Minerals, Metals and Materials Society, pp. 375-377, Light Metals 2015 - TMS 2015 Annual Meeting and Exhibition, Orlando, United States, 15-19 March.
    Lee A, Lu Y, Roche A, Pan TY. Use of nano-structured silanols on the solidification of aluminum-silicon based casting alloys. In Light Metals 2015 - At the TMS 2015 Annual Meeting and Exhibition. Vol. 2015-January. Minerals, Metals and Materials Society. 2015. p. 375-377.

    Lee, Andre; Lu, Yang; Roche, Allen; Pan, Tsung Yu / Use of nano-structured silanols on the solidification of aluminum-silicon based casting alloys.

    Light Metals 2015 - At the TMS 2015 Annual Meeting and Exhibition. Vol. 2015-January Minerals, Metals and Materials Society, 2015. p. 375-377.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

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