The Influence of Si Content on the Microstructure of Rapidly Solidified AlMnSi Foil

Abstract:

The AlMn and AlMnSi foils were fabricated by rapid solidification technology. The microstructures of the foils with various Si content were studied by transmission electron microscope (TEM). The phases of the foils were indentified by X-ray diffractometer (XRD); the phase transformation temperatures of the foils measured by differential scanning calorimeter (DSC). The results showed that addition of Si in the AlMn foil can improve the heat stability (phase transformation temperature) from 543K to over 873K. The addition of Si can change the phase structure of the foils. The phases of AlMn foil conclude Al and Al₆Mn while the phases of AlMnSi foils with 3% Si or 5% Si addition become Al and Al_4.01MnSi_0.74. The addition of Si can also change the microstructure morphology of the foils from the rod, block and petal-like to the homogeneous globular. With the increase in Si content, the grain sizes of the foils were refined.

• Periodical: Advanced Materials Research (Volumes 295-297)
• Pages: 307-310
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.295-297.307
• Online since: July 2011
• Authors: Yan Li, Chuan Xin Zhai, Chun Hua Xu
• Keywords: AlMn, AlMnSi, Microstructure, Rapid Solidification

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