Abstract
We report on the glass-forming ability and devitrification behavior of Zr60Cu30Al10, Zr60Cu25Al10Fe5 and Zr62.5Cu22.5Al10Fe5 bulk glass-forming alloys on heating. The effect of Fe addition on the structure of Zr–Al–Cu alloys is also discussed. Crystallization kinetics and structural changes in the glassy alloys were studied using X-ray diffraction, transmission electron microscopy, differential scanning and isothermal calorimetry methods. The results indicate that good glass-formers, such as Zr62.5Cu22.5Al10Fe5, are located somewhat beyond the equilibrium eutectic point. Possible phase separation in the supercooled liquid on heating and electron beam-induced in situ crystallization are observed and discussed.
Acknowledgements
This work was supported by the Research and Development Project on Advanced Metallic Glasses, Inorganic Materials and Joining Technology and by Grant-in-Aid “Priority Area on Science and Technology of Microwave-Induced, Thermally Non-Equilibrium Reaction Field” No. 18070001 from the Ministry of Education, Culture, Sports, Science and Technology, Japan. We thank Dr. Hayasaka from the High-Voltage Microscopy Center for HAADF observations.