Title |
Enhancing glass-forming ability via frustration of nano-clustering in alloys with a high solvent content
|
---|---|
Published in |
Scientific Reports, June 2013
|
DOI | 10.1038/srep01983 |
Pubmed ID | |
Authors |
H. X. Li, J. E. Gao, Y. Wu, Z. B. Jiao, D. Ma, A. D. Stoica, X. L. Wang, Y. Ren, M. K. Miller, Z. P. Lu |
Abstract |
The glass-forming ability (GFA) of alloys with a high-solvent content such as soft magnetic Fe-based and Al-based alloys is usually limited due to strong formation of the solvent-based solid solution phase. Herein, we report that the GFA of soft magnetic Fe-based alloys (with >70 at.% Fe to ensure large saturation magnetization) could be dramatically improved by doping with only 0.3 at.% Cu which has a positive enthalpy of mixing with Fe. It was found that an appropriate Cu addition could enhance the liquid phase stability and crystallization resistance by destabilizing the α-Fe nano-clusters due to the necessity to redistribute the Cu atoms. However, excessive Cu doping would stimulate nucleation of the α-Fe nano-clusters due to the repulsive nature between the Fe and Cu atoms, thus deteriorating the GFA. Our findings provide new insights into understanding of glass formation in general. |
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