Abstract
To understand the role of Sr in doped aluminium-silicon alloys, we have conducted for the first time, Sr- K edge XAFS measurements on Al-3%Si-0.04%Sr. Aluminium-Silicon alloys are widely used in automobile and aerospace applications. Modification of these alloys with addition of trace levels of Sr (200-400 ppm) results in changing the morphology of Si eutectic from "plate" like structure to "fibrous" structure. Several theories have been proposed to understand the mechanism of modification of eutectic phases with Sr addition in these alloys, but there is no conclusive evidence in support of these theories. From our XAFS analysis, we suggest Sr-Si bonds and Sr-Sr correlations may be responsible for the morphological transformation observed in the alloy. © 2009 IOP Publishing Ltd.
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CITATION STYLE
Prakash Srirangam, V. S., Chattopadhyay, S., Shibata, T., Kaduk, J. A., Miller, J. T., Segre, C. U., & Shankar, S. (2009). XAFS studies on a modified Al-Si hypoeutectic alloy. In Journal of Physics: Conference Series (Vol. 190). Institute of Physics Publishing. https://doi.org/10.1088/1742-6596/190/1/012068
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