Quantitative Evaluation of the Glass Forming Ability of (Cu-Zr) Based Glass Alloys with Thermodynamics Method

Abstract:

Along nucleation → crystalline growth →crystalline fraction → critical cooling rate, the relationship between the nucleation, elements, cooling rate and the Glass Forming Ability of (Cu-Zr) based glass alloys is quantitatively studied with thermodynamics method, and a better method to evaluate the critical cooling rate of glass alloys is also proposed in this paper. The computed results show that: (1) with the increase of element number, the steady state nucleation rate drops gradually. From Cu-Zr, Cu-Zr-Al, Cu-Zr-Al-Ni, to Cu-Zr-Al-Ni-Ti, the peak value of nucleation rate decreases from 10²¹ mol^-1s^-1 to 10¹³ mol^-1s^-1. It is also found the nucleation rate both drops with the substitution of Ni with Cu or Al with Zr; (2) with the increase of cooling rate, the nucleation rate drops sharply. When the cooling rate reaches 10³K/s, the nucleation rates of Cu₆₄Zr₃₆, Cu₅₄Zr_42.5Al_3.5, Cu₅₅Zr₄₀Al₅ and Cu₃₀Zr₅₅Al₁₀Ni₅ drop to 10⁹mol^-1s^-1, 10⁶mol^-1s^-1, 10⁷mol^-1s^-1 and 10³mol^-1s^-1 accordingly.

• Periodical: Advanced Materials Research (Volumes 239-242)
• Pages: 1622-1625
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.239-242.1622
• Online since: May 2011
• Authors: Hui Qiang Li, Long Fei Liu
• Keywords: Critical Cooling Rate, Glass Forming Ability (GFA), Nucleation Rates

References

[1] O.N. Senkov, J.M. Scott: J Non-Cryst Solids Vol. 351(2005) , p.3087

[2] K. Mondal, B.S. Murty: J Non-Cryst Solids Vol. 351(2005) , p.1366

[3] X.S. Xiao, S.S. Fang, G.M. Wang, Q. Hua, Y.D. Dong: J. Alloys Comp. Vol. 376(2004) , p.145

[4] N. Nishiyama, A. Inoue: Mater. Trans. Vol. 43(2002) , p. (1913)

[5] J.H. Kim, J.S. Park, H.K. Lim, W.T. Kim, D.H. Kim: J Non-Cryst Solids Vol. 351(2005) , p.1433

[6] Q.J. Chen, J. Shen, H.B. Fan, J.F. Sun, Y.T. Huang, D.G. Mccartney: Chin. Phys. Lett. Vol. 22(2005) , p.1736.