Investigation of crystallization kinetics of Co-Fe-Ta-Hf-B melt-spun glassy ribbon with a high thermal stability under isochronal condition

Subject Areas : journal of New Materials

A. H. Taghvaei ¹ (Assistant Professor of Materials Science and Engineering Department, Shiraz University of Technology)
N. Ghasemalinezhad Shirazifard ² (Master Student of Materials Science and Engineering Department, Shiraz University of Technology)

Received: 2017-12-28 Accepted : 2018-04-18 Published : 2018-07-23

Keywords: Metallic glass, Melt spinning, Crystallization kinetics, Autocatalytic behavior,

Abstract :

     Co-based metallic glasses have attracted the attention of many researchers due to their excellent magnetic softness, as well as their high corrosion resistance. In the present research, Co-Fe-Ta-Hf-B glassy ribbon with a high thermal stability was prepared by melt-spinning and its isochronal crystallization kinetics at different heating rates was systematically investigated. The apparent and local activation energy of crystallization, the fraction of crystals at different temperatures and other kinetics parameters were calculated according to Ozawa method. In addition, the devitrification kinetics of the produced glass was studied based on the well-known Jahnson-Mehl-Avrami (JMA) and Sestak-Berggren (SB) models. The results indicated that the local activation energy increases with progress of crystallization. Furthermore, the average activation energy calculated based on the Kissinger model was 664 kJ/mol, which is larger than many other metallic glasses, and confirms a high thermal stability of this alloy. It was shown that the JMA model cannot be used for analysis of the crystallization behavior of the present alloy and due to a complex and autocatalytic nature of crystallization, the SB model gives more liable results for investigation of crystallization kinetics.

References:

References:

 

 

 

1-                  C. Suryanarayana and A. Inoue, "Bulk metallic glasses", Materials Science and Engineering: A, Vol. 375, pp. 785-788, 2004.

2-                  W. H. Wang, C. Dong and C. Shek, "Bulk metallic glasses", Materials Science and Engineering: R: Reports, Vol. 44, pp. 45-89, 2004.    

3-                  H. K. Lachowicz , T. Kulik, R. Zuberek, L.Malkinski, M. Kuzminski, A. Slawska and J. S. Munoz "Tailoring soft and hard magnets by annealing Co-based metallic glass", Journal of Magnetism and Magnetic Materials, Vol.190, pp. 267-276, 1998.

4-                  A. Inoue, B. L. Shen, H. Koshiba, H. Kato and A. R. Yavari,"Ultra-high strength above 5000 MPa and soft magnetic properties of Co–Fe–Ta–B bulk glassy alloys", Acta Materialia, Vol. 52, pp. 1631-1637, 2004.           

5-                   A.H Taghvaei, M. Stoica, M. Samadi, I. Kaban and K. Janghorban "DSC, XRD and TEM characterization of glassy Co40Fe22Ta8B30 alloy with very high thermal stability", Materials Letters, Vol. 93, pp. 322-325, 2013.     

6-                 ن.قاسمعلی نژاد شیرازی فرد و ا.ح.تقوایی،" بررسی رفتار حرارتی آلیاژ شیشه­ای Co40Fe22Ta5.5Hf2.5B30 تولید شده با روش مذاب ریسی،" ششمین کنفرانس بین المللی مهندسی مواد و متالورژی، آبان 1396.

7-                  H. E. Kissinger, "Reaction kinetics in differential thermal analysis," Analytical chemistry, Vol. 29, , pp. 1702-1706, 1957.

8-                   T. Ozawa, "A new method of analyzing thermogravimetric data," Bulletin of the chemical society of Japan, Vol. 38, pp. 1881-1886, 1965.

9-                  YQ. Gao and W. Wang, "On the activation energy of crystallization in metallic glasses," Journal of Non-Crystalline solids, Vol. 81, pp. 129-134, 1986.

10-               K. Song, X. Bian, J. Guo, X. Li, M. Xie, and C. Dong, "Study of non-isothermal primary crystallization kinetics of Al84Ni 12Zr1Pr3 amorphous alloy," Journal of Alloys and Compounds, Vol. 465, , pp. L7-L13, 2008.  

11-              M. Shapaan, J. Gubicza, J. Lendvai, and L. K. Varga, "Crystallization behavior of (Fe 100− x Co x) 62Nb8B30 bulk amorphous alloy," Materials Science and Engineering: A, Vol. 375, pp. 785-788, 2004.

12-              Z.Jamili-Shirvan, M. Haddad-Sabzevar, J. Vahdati Khakiand and K. Yao, " Thermal behavior and non-isothermal crystallization kinetics of (Ti41Zr25Be28Fe6)93Cu7 bulk metallic glass”, Journal of Non-Crytsalline Solids, Vol. 447, pp. 156-166, 2016.      

13-              A. H. Taghvaei and J. Eckert, " A comparative study on the isochronal and isothermal crystallization kinetics of Co46.45Fe25.55Ta8B20 soft magnetic metallic glass with high thermal stability”, Vol. 675, pp. 223-320, 2015.      

14-              N. Clavaguera, M. Clavaguera-Mora, and M. Fontana, "Accuracy in the experimental calorimetric study of the crystallization kinetics and predictive transformation diagrams: Application to a Ga–Te amorphous alloy", Journal of Materials research, Vol. 13, pp. 744-753, 1998.

15-              J. Málek, "Kinetic analysis of crystallization processes in amorphous materials", Thermochimica Acta, Vol. 355, pp. 239-253, 2000. 

16-              J. Wang, H. C. Kou, J. S. Li, X.F.Gu, L. Q. Xing and LZhou, "Determination of kinetic parameters during isochronal crystallization of Ti 40 Zr25Ni8Cu 9 Be18 metallic glass", Journal of Alloys and Compounds, Vol. 479, pp. 835-839, 2009.