Critical Cooling Rate for the Glass Formation of Fe_80-XCo_xP₁₃C₇ Alloy

Abstract:

In this work, the critical cooling rate R_c for glass formation of a series of Fe_80-xCo_xP₁₃C₇ (x = 0, 5, 10, 15, 20 at.%) alloys was determined by means of constructing CCT curves using Uhlmanns method. The calculated critical cooling rates for x = 0, 5, 10, 15, 20 at.% are 621, 441, 548, 894, 922 K/s, respectively. These results well coincide with the maximum diameters of Fe_80-xCo_xP₁₃C₇ amorphous alloys determined by experiments varying with the content of Co. The calculated R_c was also on the reasonable order of magnitudes. In addition, the values of three common GFA criterions of T_rg, ΔT_x and γ were calculated according to the thermodynamic data determined from DSC and DTA curves of Fe_80-xCo_xP₁₃C₇ (x = 0, 5, 10, 15, 20 at.%) bulk amorphous alloy. The validity of these GFA criterions in the series of Fe_80-xCo_xP₁₃C₇ (x = 0, 5, 10, 15, 20 at.%) alloys were investigated and it was pointed out that these three GFA criterions were not able to explain the experimental results of the maximum diameters of Fe_80-xCo_xP₁₃C₇ amorphous alloys varying with the content x of Co.

• Periodical: Materials Science Forum (Volumes 745-746)
• Pages: 799-808
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.745-746.799
• Online since: February 2013
• Authors: Kai Xu, Yan Wang, Qiang Li
• Keywords: Bulk Metallic Glass (BMG), Critical Cooling Rate, Fe-Co-P-C, Glass Forming Ability

References

[1] P. Duwez, R.H. Willens, W. Klement, Non-crystalline structure inn solidified gold silicon alloy. Nature. 18(1960)869-872.

DOI: 10.1038/187869b0

[2] W.H. Wang, C. Dong, C.H. Shek, Bulk metallic glasses. Materials Science and Engineering R: Reports. 44(2-3) (2004) 45-89.

DOI: 10.1016/j.mser.2004.03.001

[3] A. Inoue, A. Takeuchi, Recent development and applications of bulk glassy alloys. International Journal of Applied Glass Science. 1(2010) 273-295.

DOI: 10.1111/j.2041-1294.2010.00019.x

[4] D. Turnbull, Under what conditions can a glass be formed?[J]. Contemp Phys. 10(5)(1969)473.

[5] A. Inoue, Stabilization of metallic supercooled liquid and bulk amorphous alloys. Acta Mater. 48(2000) 279.

DOI: 10.1016/s1359-6454(99)00300-6

[6] Z.P. Lu, C.T. Liu, A new glass-forming ability criterion for bulk metallic glasses. Acta Mater. 50(13)(2002)350.

DOI: 10.1016/s1359-6454(02)00166-0

[7] B. Yang, Y. Du and Y. Liu, Recent progress in criterions for glass forming ability. Transactions of Nonferrous Metals Society of China. 19(1)(2009)78-84.

DOI: 10.1016/s1003-6326(08)60232-0

[8] D.R. Uhlmann, A kinetic treatment of glass formation. J Non-Cryst Solids. 7(4) (1972)337.

[9] K. Xu, Y. Wang, J.F. Li, Q. Li, Critical cooling rate for the glass formation of ferromagnetic Fe80P13C7 alloy. unpolished work.

[10] Q. Li, J.F. Li, P. Gong, K.F. Yao, J.E. Gao, H.X. Li. Formation of bulk magnetic ternary Fe80P13C7 glassy alloy, intermetallics. 26(2012) 62.

DOI: 10.1016/j.intermet.2012.03.045

[11] K.F. Kelton, Crystal Nucleation in Liquids and Glasses. Solid State Phys. 45(1991) 75.

[12] J.W. Christian, The Theory of Transformations in Metals and Alloys, Pergamon, Oxford, (1975).

[13] C.T. Liu, J.R. Thompson, W.D. Porter, Structural Amorphous Steels. Phys. Rev. Lett. 93(4)(2004)49901.

[14] D.A. Porter, K.E. Easterling, Phase Transformation in Metals and Alloys, 2nd Edition, Chapman & Hall, London, UK, 1992, p.70.

[15] H. S. Chen. A method for evaluating viscosities of metallic glasses from the rates of thermal transformations. J. Non-Cryst. Solids. 27(2)(1978)257.

DOI: 10.1016/0022-3093(78)90128-x

[16] H.S. Chen, A method for evaluating viscosities of metallic glasses from the rates of thermal transformations. J. Non-Cryst. Solids. 27 (1978) 257.

DOI: 10.1016/0022-3093(78)90128-x

[17] H. E. Kissinger, Reaction Kinetics in Differential Thermal Analysis. Analytical Chemistry Anal. Chem. 29(11)(1957)1702.

DOI: 10.1021/ac60131a045

[18] E. Scheil, Arch. Eisenhuttenwes. 8(1935)565.

[19] Q. Li, Numerical Calculation of the Cooling Rate in the J-Quenching Technique. Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science. 40(3)(2009)405.