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RETRACTED – Formation and properties of Zr-based bulk quasicrystalline alloys with high strength and good ductility

Published online by Cambridge University Press:  31 January 2011

A. Inoue ,
T. Zhang ,
M. W. Chen ,
T. Sakurai ,
J. Saida  and
M. Matsushita
A. Inoue
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–8577, Japan
T. Zhang
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–8577, Japan
M. W. Chen
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–8577, Japan
T. Sakurai
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–8577, Japan
J. Saida
Affiliation:
Inoue Superliquid Glass Project, Exploratory Research for Advanced Technology, Japan Science and Technology Corporation, Sendai 982–0807, Japan
M. Matsushita
Affiliation:
Inoue Superliquid Glass Project, Exploratory Research for Advanced Technology, Japan Science and Technology Corporation, Sendai 982–0807, Japan
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Abstract

The crystallization mode of the Zr–Al–Ni–Cu amorphous alloys changed from a single stage to become two stages by the addition of Ag or Pd, and the first-stage exothermic reaction was found to result from the precipitation of nanoscale icosahedral particles with a size of 20 to 50 nm. The precipitation took place by high nucleation and low growth rates in a polymorphous mode for the Ag-containing alloys, and a diffusioncontrolled mode for the Pd-containing alloys. The nanoscale mixed structure alloys exhibited improved strength and ductility as compared with the corresponding amorphous single-phase alloys. The findings of the dispersion strengthening as well as the dispersion ductilization gave a future opportunity to fabricate a new bulk nonequilibrium phase alloy by use of the new phenomenon.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 10 , October 2000 , pp. 2195 - 2208
Copyright
Copyright © Materials Research Society 2000

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References

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