Journal of Materials Research

Articles

Influence of casting temperature on the thermal stability of Cu- and Zr-based metallic glasses: Theoretical analysis and experiments

Z.W. Zhua1, H.F. Zhanga2 c1, H. Wanga3, B.Z. Dinga4 and Z.Q. Hua4

a1 Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China; and Faculty of Engineering and Surveying, The University of Southern Queensland, Toowoomba, Queensland 4350, Australia

a2 Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China

a3 Faculty of Engineering and Surveying, The University of Southern Queensland, Toowoomba, Queensland 4350, Australia

a4 Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China

Abstract

Influence of casting temperature on the thermal stability of Cu- and Zr-based metallic glasses (MGs) was analyzed based on the monomer-cluster structural model using the Johnson–Mehl–Avrami (JMA) equation. The result indicates that increasing the casting temperature can enhance the thermal stability of MGs. It is suggested that it be attributed to the decrease in the amount of the local ordering clusters induced by the elevating casting temperature. The prediction is confirmed by continuous heating transformation diagrams constructed for the Cu- and Zr-amorphous samples obtained under different casting temperatures.

(Received April 16 2008)

(Accepted June 24 2008)

Key Words:

  • Amorphous;
  • Metal;
  • Rapid solidification

Correspondence:

c1 Address all correspondence to this author. e-mail: hfzhang@imr.ac.cn

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