Crystallization Kinetics of Mechanically Alloyed $Al_{80}Fe_{20}$ Amorphous Powder
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Abstract
The crystallization kinetics of an $Al_{80}Fe_{20}$ amorphous powder alloy were investigated by thermal analysis. Crystallization of amorphous $Al_{80}Fe_{20}$ during continuous heating undergoes four stages. The first-stage crystallization leads to the formation of fcc-Al from amorphous matrix. The next stages are the decomposition of the residual amorphous phase into several intermetallic compounds. The activation energies of the alloy were calculated from differential scanning calorimetry data using the Kissinger, Ozawa and Augis-Bennett models. The non-isothermal crystallization kinetics are analyzed by Johnson-Mehl-Avrami equation. The value of the Avrami index indicated that the crystallization is interface - controlled growth.
Keywords
amorphous alloys, mechanical alloying, crystallization kinetics, Avrami exponent
Article Details
References
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[3]. Akihisa Inoue, Amorphous, nanoquasicrystalline and nanocrystalline alloys in Al-based systems. Progress in Materials Science, 43 (1998) 365-520.
[4]. Sergio Scudino, Kumar B. Surreddi, Hoang V. Nguyen, Gang Liu, Thomas Gemming, Mira Sakaliyska, Ji S. Kim, Jens Vierke, Markus Wollgarten, and Jurgen Eckert, High-strength $Al_{87}Ni_{8}La_{5}$ bulk alloy produced by spark plasma sintering of gas atomized powders. Journal of Materials Research, 24 (2009) 2909-2916.
[5]. Akihisa Inoue and Hisamichi Kimura, High-strength Al-based nanostructure alloys. Current Opinion in Solid State and Materials Science, 2 (1997) 305-310.
[6]. P. P. Choi, J. S. Kim, O. T. H. Nguyen, D. H. Kwon, Y. S. Kwon, and J. C. Kim, Al-La-Ni-Fe bulk metallic glasses produced by mechanical alloying and spark-plasma sintering. Materials Science and Engineering: A, 449-451 (2007) 1119-1122.
[7]. K. B. Surreddi, S. Scudino, M. Sakaliyska, K. G. Prashanth, D. J. Sordelet, and J. Eckert, Crystallization behavior and consolidation of gas-atomized $Al_{84}Gd_{6}Ni_{7}Co_{3}$ glassy powder. Journal of Alloys and Compounds, 491 (2010) 137-142.
[8]. F. Zhou, R. Lück, M. Scheffer, D. Lang, and K. Lu, The crystallization process of amorphous Al80Fe20 alloy powders prepared by ball milling. Journal of Non-Crystalline Solids, 250-252, Part 2 (1999) 704-708.
[9]. J. Noetzel, D.C. Meyer, A. Tselev, A. Mücklich, P. Paufler, F. Prokert, E. Wieser, and W. Möller, Amorphization of Fe/Al: bulk and thin-film effects. Applied Physics A, 71 (2000) 47-54.
[10]. Wang Genmiao, Zhang Daoyuan, Chen Huiyu, Lin Bixia, Wang Weihua, and Dong Yuanda, Formation and properties of $Fe_{20}Al_{80}$ amorphous powder. Physics Letters A, 155 (1991) 57-61.
[11]. Nguyen Hoang Viet, Nguyen Thi Hoang Oanh, Pham Ngoc Dieu Quynh, Tran Quoc Lap, and Kim Ji Soon. Bulk Amorphous Al80Fe20 Produced by Mechanical Alloying and Spark-Plasma Sintering. in The 2nd International Conference on Advanced Materials and Nanotechnology 2014. Hanoi: Bach Khoa Publishing house.
[12]. Miray Çelikbilek, Ali Erçin Ersundu, and Süheyla Aydın, Chapter 6 Crystallization Kinetics of Amorphous Materials, in Advances in Crystallization Processes, Y. Mastai, Editor. 2012, InTech. p. 127-158.
[13]. S. W. Du and R. V. Ramanujan, Crystallization and magnetic properties of $Fe_{40}Ni_{38}B_{18}Mo_{4}$ amorphous alloy. Journal of Non-Crystalline Solids, 351 (2005) 3105-3113.
[14]. J.W. Christian, The Theory of Transformations in Metals and Alloys. 1975, Netherlands: Pergamon, Oxford.