Non-Isothermal Crystallization Kinetics of Co₆₇Fe₄Cr₇Si₈B₁₄ Amorphous Alloy

Abstract:

Non-isothermal crystallization kinetics of Co₆₇Fe₄Cr₇Si₈B₁₄ amorphous ribbons was studied by differential scanning calorimetry (DSC) technique under 10, 20, 30, 40 and 80 °Cmin^-1 heating rates. It is found that Co₆₇Fe₄Cr₇Si₈B₁₄ amorphous alloy exhibits two-stage crystallization on heating. The two crystallization peaks shift to higher temperatures with increasing heating rate. The apparent activation energies (E_C) for the first stage of crystallization were determined as 443.44 and 434.47 kJmol^-1 by using the Kissinger and Ozawa equations, respectively. Frequency factor (A) estimated to be 1.084×10²⁶ s^-1 using Kissinger equation. Kinetics parameters such as Crystallization exponent (n) and dimensionality of growth (N_dim) were determined using JMA (Johnson-Mehl-Avrami) method. Details of the nucleation and growth behaviours during the non-isothermal crystallization were studied in terms of local activation energy E_C(x) by the OFW (Ozawa, Flynn and Wall) method. Also the activation energy for nucleation (E_n) and growth (E_g) separately estimated.

• Periodical: Materials Science Forum (Volumes 706-709)
• Pages: 1311-1317
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.706-709.1311
• Online since: January 2012
• Authors: S.A. Hasheminezhad, M. Haddad-Sabzevar, S. Sahebian
• Keywords: Co-Based Amorphous Alloy, Non-Isothermal Crystallization Kinetics, Thermal Analysis

References

[1] T.L. Shanker Rao, K.N. Lad and A. Pratap: J. Therm. Anal. Vol. 78 (2004), p.769.

[2] H.F. Li and R.V. Ramanujan: Mater. Sci. A 375–377 (2004), p.1087.

[3] Z.Z. Yuan, X.D. Chen, B.X. Wang and Y.J. Wang: J. Alloys Compd. Vol. 407 (2006), p.163.

[4] K. Song, X. Bian, J. Guo, X. Li, M. Xie and C. Dong: J. Alloys Compd. Vol. 465 (2008), p. L7.

[5] J. Vázquez, P.L. López-Alemany, P. Villares and R. Jiménez-Garay: Mater. Chem. Vol. 57 (1998), p.162.

[6] H.E. Kissinger: Anal. Chem. Vol. 29 (1957), p.1702.

[7] T. Ozawa: Bull. Chem. Soc. Jpn. Vol. 38 (1965), p.1881.

[8] T. Ozawa: J. Thermal Anal. Vol. 2 (1970), p.301.

[9] M. Haddad-Sabzevar: Ph. D. Thesis. Ribbon formation and solidification behavior in planar flow melt spinning process. Stockholm (1994).

[10] P. Supaphol, P. Thanomkiat, J. Junkasem and R. Dangtungee: Polym. Test. Vol. 26 (2007), p.20.

[11] H. Nitsche, M. Stanislowski, F. Sommer and E.J. Mittemeijer: Ph. D. Thesis. Kinetics of crystallization in amorphous alloys; nucleation and growth. Universität Stuttgart (2005).

[12] D.M. Minić, A. Maričić and B. Adnadević: J. Alloys Compd. Vol. 473 (2009), p.363.

[13] A.A. Joraid, A.A. Abu-sehly, M. Abu El-Oyoun and S.N. Alamri: Thermochim. Acta. Vol. 470 (2008), p.98.

DOI: 10.1016/j.tca.2008.02.010

[14] M.J. Starink: Thermochim. Acta. Vol. 404 (2003), p.163.

[15] I.C. Rho, C.S. Yoon, C.K. Kim, T.Y. Byun and K.S. Hong: Mater. Sci. B 96 (2002), p.48.

[16] J.S.C. Jang, I.H. Wang, L.J. Chang, G.J. Chen, T.H. Hung and J.C. Huang: Mater. Sci. A. 449–451 (2007), p.511.

[17] D.W. Henderson: Therm. Anal. Vol. 15 (1979), p.325.

[18] D.W. Henderson: J. Non-Cryst. Solids. Vol. 30 (1979), p.301.