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 proceedingChapter

    Abstract

    Mnor 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
    PublisherWiley Blackwell
    Pages373-377
    Number of pages5
    ISBN (Electronic)9781119093435
    ISBN (Print)9781119082446
    DOIs
    StatePublished - Feb 20 2015

    Profile

    Casting
    Solidification
    Cortical Synchronization
    Fingersucking
    Eutectics
    Ductility
    Aluminum
    Cardanolides
    Aluminum castings
    Strengthening (metal)
    Alloying elements
    Aluminum alloys
    Tensile strength
    Heat treatment
    Silicon
    Microstructure
    Edema Disease of Swine
    Aprindine
    Helsinki Declaration
    Cote d'Ivoire

    Keywords

    • Cast Aluminum alloy
    • Nanostructured Silanols
    • Solidification

    ASJC Scopus subject areas

    • Engineering(all)
    • Materials Science(all)

    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 (pp. 373-377). Wiley Blackwell. DOI: 10.1002/9781119093435.ch62

    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. Wiley Blackwell, 2015. p. 373-377.

    Research output: Chapter in Book/Report/Conference proceedingChapter

    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. Wiley Blackwell, pp. 373-377. DOI: 10.1002/9781119093435.ch62
    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. Wiley Blackwell. 2015. p. 373-377. Available from, DOI: 10.1002/9781119093435.ch62

    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. Wiley Blackwell, 2015. p. 373-377.

    Research output: Chapter in Book/Report/Conference proceedingChapter

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