Abstract
A systematic structural investigation on rapidly solidified Ti–Fe–Si alloy system with various compositions and processing conditions has been carried out. Transmission electron microscopic studies on as-quenched alloys reveal the presence of various kinds of structural disorder. Different kinds of disorder and the resulting deviation from the icosahedral symmetry have been reported. This appears to be the first report of these results on a Ti–Fe–Si system. Anisotropy in the shape of diffraction spots, strong arcs of diffuse scattering of icosahedral phase in melt-quenched alloys have been observed. The microstructure of the icosahedral Ti–Fe–Si alloys has been characterized. Results have been compared with other known Ti based quasicrystalline alloys and analyzed on the basis of current understanding.
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