Enhancing glass-forming ability via frustration of nano-clustering in alloys with a high solvent content

H. X. Li, J. E. Gao, Y. Wu, Zengbao Jiao, D. Ma, A. D. Stoica, X. L. Wang, Y. Ren, M. K. Miller, Z. P. Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

31 Citations (Scopus)

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.
Original languageEnglish
Article number1983
JournalScientific Reports
Volume3
DOIs
Publication statusPublished - 8 Jul 2013
Externally publishedYes

ASJC Scopus subject areas

  • General

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