期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 44, 期 -, 页码 201-208出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2019.10.038
关键词
Immiscible alloys; Liquid-liquid phase separation; Rapid solidification; Microstructure; Electrical resistivity behavior
资金
- National Natural Science Foundation of China [51774264, 51574216, 51974288, 51374194]
- Natural Science Foundation of Liaoning Province of China [2019-MS-332]
The immiscible Cu-Fe alloy was characterized by a metastable miscibility gap. With the addition element Zr, the miscibility gap can be extended into the Cu-Fe-Zr ternary system. The effect of the atomic ratio of Cu to Fe and Zr content on the behavior of liquid-liquid phase separation was studied. The results show that liquid-liquid phase separation into Cu-rich and Fe-rich liquids took place in the as-quenched Cu-Fe-Zr alloy. A glassy structure with nanoscale phase separation was obtained in the as-quenched (Cu0.5Fe0.5)(40)Zr-60 alloy sample, exhibiting a homogeneous distribution of glassy Cu-rich nanoparticles in glassy Fe-rich matrix. The microstructural evolution and the competitive mechanism of phase formation in the rapidly solidified Cu-Fe-Zr system were discussed in detail. Moreover, the electrical property of the as-quenched Cu-Fe-Zr alloy samples was examined. It displays an abnormal change of electrical resistivity upon temperature in the nanoscale-phase-separation metallic glass. The crystallization behavior of such metallic glass has been discussed. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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