Soft Magnetic Bulk Glassy Alloy Synthesized by Flux Melting and Water Quenching


Article Preview

The flux treatment was applied to increase the glass-forming ability of a glassy [(Fe0.5Co0.5)0.75B0.20Si0.05]96Nb4 alloy. The large bulk glassy specimen with diameter of 7.7 mm was prepared by water quenching the melt immersed in the molten flux of B2O3. The diameter of the specimens is approximately 1.5 times as large as the previous result, even though the cooling rate of copper mold casting should be much higher than that of water quenching. The critical cooling rate for a glassy phase is 150 - 170 K/s, which is much slower than 500 K/s without the flux treatment. The flux treatment improves the glass-forming ability by cleaning the molten metal where heterogeneous nucleation is difficult to take place.



Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran




A. Makino et al., "Soft Magnetic Bulk Glassy Alloy Synthesized by Flux Melting and Water Quenching", Materials Science Forum, Vols. 539-543, pp. 1921-1925, 2007

Online since:

March 2007




[1] A. Inoue and J. S. Gook: Mater. Trans., JIM Vol. 36 (1995), p.1180.

[2] A. Inoue, T. Zhang and A. Takeuchi: Appl. Phys. Lett., Vol. 71 (1997), p.464.

[3] A. Inoue, A. Takeuchi and B. Shen: Mater. Trans. Vol. 42 (2001), p.970.

[4] A. Inoue and A. Takeuchi: Mater. Trans. Vol. 43 (2002), p.1892.

[5] A. Inoue and B. Shen: Mater. Trans. Vol. 43 (2002), p.766.

[6] A. Inoue, B. L. Shen, A. R. Yavari and A. L. Greer: J. Mater. Res. Vol. 18 (2003).

[7] A. Inoue, B. L. Shen, H. Koshiba, H. Kato and A. R. Yavari: Acta Mater. Vol. 52 (2004), p.1631.

[8] A. Inoue, B. L. Shen and C. T. Chang: Acta Mater. Vol. 52 (2004), p.4093.

[9] B. L. Shen and A. Inoue: J. Mater. Res. Vol. 20 (2005), p.1.

[10] V. Ponnambalam, S. J. Poon and G. J. Shiflet: J. Mater. Res. Vol. 19 (2004), p.1320.

[11] Z. P. Lu, C. T. Liu, J. R. Thomson and W. D. Porter: Phys. Rev. Lett. Vol. 92 (2004), p.245503.

[12] H. W. Kui, A. L. Greer and D. Turnbull: Appl. Phys. Lett. Vol. 45 (1984), p.615.

[13] A. Inoue, N. Nishiyama and H. Kimura: Mater. Trans., JIM Vol. 38 (1997), p.179.

[14] S. Vitta, C. S. Proctor, R. F. Cochrane and A. L. Greer: Mater. Sci. Eng. Vol. A133 (1991), p.799.

[15] T. D. Shen and R. B. Schwarz: Appl. Phys. Lett. Vol. 75 (1999), p.46.

[16] T. D. Shen and R. B. Schwarz: Acta Mater. Vol. 49 (2001), p.837.

[17] M. W. Chase Jr.: NIST-JANAF Thermochemical Tables, 4th ed., Pt. 1 and 2 (American Chemical Society and American Institute of Physics, USA 1998).