| Solidification microstructures and phases in rapidly solidified Al-5, 10wt%Fe alloys have been investigated by TEM bright field and dark field imaging techniques and electron and X-ray diffraction techniques. Rapid solidification of Al-5, 10wt%Fe alloys produces various metastable and stable phases, such as Al_mFe, Al_6Fe and Al_(13)Fe₄. In addition to these phases, clusters of randomly oriented few ㎚ scale particles exist in the form of fine cellular network with α-Al or primary spherical particles. Solidification microstructures of the rapidly solidified Al-5, 10wt%Fe alloys consist of various combination of primary phases such as Al_(13)Fe₄, Al_mFe and cluster of ㎚ scale particles, and cellular/dendritic structures such as fine cellular network structure of ㎚ scale particle clusters and α-Al and cellular structure of Al_mFe and α-Al, depending upon alloy compositions and local cooling rates. |
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