Considerable interest is nowadays given to the synthesis of lightweight Ti-, Al- and Mg-based alloys with improved mechanical properties and high corrosion resistance. In particular, Ti-based alloys are an important class of engineering materials for which high mechanical strength and thermal stability are essential. The formation and stability of intermetallic phases in Ag-substituted Ti-Zr-Ni alloys was followed using in-situ high-temperature synchrotron radiation diffraction experiments. The substitution of Ti with Ag enhances the formation of amorphous or nanostructured phases during rapid solidification. Upon further heating, the alloy structure transforms to a fine mixture of icosahedral and crystalline phases depending on the alloy composition and thermal processing parameters. Differential scanning calorimetry studies were performed in order to identify the nature and sequence of the structural phase transitions. The results are relevant to the synthesis of bulk amorphous and bulk nanocrystalline materials in Ti/Zr-based alloys, in particular for sintering and thixoforming processing procedures.
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