Crystallization of amorphous Fe78B13Si9
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Crystallization of amorphous Fe78B13Si9 has been investigated using a combination of differential scanning calorimetry (DSC) and conventional and high-resolution transmission electron microscopy. The crystallization mechanisms and crystalline products are sensitive to the annealing temperature. At 450‡C, crystallization takes place by the growth of b c c α-Fe (Si) dendrites, while at 510 and 515‡C there are three simultaneous reactions to form dendritic b c c α-Fe (Si), elliptical crystals of b c t Fe3B and lamellar eutectic spherulites of b c c α-Fe (Si) and b c t Fe3B. Quantitative TEM shows that the b c c α-Fe (Si) dendrites and b c c α-Fe (Si)-b c t Fe3B spherulites both form with constant nucleation and growth rates, in agreement with previous. DSC measurements of an Avrami exponent of 4.
KeywordsPolymer Growth Rate Microscopy Electron Microscopy Crystallization
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- 1.B. Cantor (ed.), “Rapidly Quenched Metals III” (Metals Society, 1978).Google Scholar
- 2.T. Masumoto and K. Suzuki (eds), “Rapidly Quenched Metals IV” (Japan Institute of Metals, 1982).Google Scholar
- 3.H. Warlimont and S. Steeb (eds), “Rapidly Quenched Metals V” (North Holland, 1985).Google Scholar
- 4.H. Herman (ed.), “Rapidly Quenched Metals VI” (Elsevier, 1988).Google Scholar
- 5.H. Frederiksson and S. Savage (eds), “Rapidly Quenched Materials VIII” (Elsevier, 1991).Google Scholar
- 6.M. G. Scott, in “Amorphous Metallic Alloys”, edited by F. E. Luborsky (Butterworths, 1983) p. 144.Google Scholar
- 8.M. A. Hughes, A. R. Bhatti, G. Wei and B. Cantor, Mater. Forum 11 (1988) 21.Google Scholar
- 11.U. Koster and U. Herold, in “Glassy Metals 1”, edited by H. J. Guntherodt and H. Beck (Springer, Berlin, 1982) p. 225.Google Scholar
- 13.J. A. Belk and A. L. Davies (eds), “Electron Microscopy and Microanalysis of Metals” (Elsevier, Amsterdam, 1965) p. 96.Google Scholar
- 16.R. S. Tiwari, S. Ranganathan and M. Von Heimendahl, Z. Metallkde 8 (1981) 563.Google Scholar