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.

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

Silicon
Aluminum
Solidification
Casting
Eutectics
Ductility
Aluminum castings
Strengthening (metal)
Alloying elements
Aluminum alloys
Tensile strength
Heat treatment
Microstructure
silanol

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. pp. 373-377
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