The microstructural evolution of Al95In5 powder mixture during ball milling is investigated using XRD, TEM, SEM EDX etc. It is shown that a nanocomposite of Al95In5 is formed after milling for 300 h. In the final milled product, the refined fn particles are embedded dispersively in the Al matrix and the grain sizes of Al and In reach 20 nm and 18 nm, respectively. Due to the partial fusion of the In component during milling, the conventional layered microstructure is not formed in the milled powders. The addition of In has a hindering effect on the grain refinement of the Al component. As tin impurity, Fe is dissolved in the Al matrix during milling, with a content of 0.87 at.% Fe after milling for 300 h, which results in a reduction of the lattice parameter of Al.
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