Authors: Emília Illeková Helene Lefaix Frederic Prima Dušan Janičkovič Peter Švec
Publish Date: 2010/01/07
Volume: 99, Issue: 3, Pages: 957-963
Abstract
The influence of the solidification rate the thermal stability and devitrification process of the rapidly solidified Ti45Zr38Ni17 alloy have been examined on ribbons prepared by the planar flow casting method Differential scanning calorimetry in the continuous heating mode Xray diffraction and electron microscopy techniques were applied Comparison of the soobtained microstructures revealed the competition between icosahedral quasicrystalline and βTiZr phases both dispersed in an amorphous matrix It has been found that the decomposition process of rapidly quenched ribbons consists of the sequence of several independent exothermic and endothermic reactions involving the additional precipitation of quasicrystalline nanoparticles and both irreversible and reversible changes between the unstable hightemperature β and stable lowtemperature α phases The formation of the intermetallics as well as the transformation of quasicrystals into Laves phase has been observed at higher temperatures in all ribbonsThe authors gratefully acknowledge the financial support of the Slovak grant agencies under the contracts VEGA 2/0157/08 APVV041306 and APVV010207 project in the Framework COST P17 Action and the SAS Centre of Excellence “Nanosmart” HL is grateful to the SMATEC company Belgium for providing her doctorate scholarship
Keywords: