Study of the kinetics and products of the devitrification process of mechanically amorphized Fe70Zr30 alloy

JOURNAL OF ALLOYS AND COMPOUNDS

卷:825

Article

Manchon-Gordon, A. F.¹  Ipus, J. J.¹  Blazquez, J. S.¹  Conde, C. F.¹  Conde, A.¹  Svec, P., Sr.² 

[1] Univ Seville, Dept Fis Mat Condensada, ICMSE, CSIC, POB 1065, E-41080 Seville, Spain

[2] Slovak Acad Sci, Inst Phys, Dubravska Cesta 9, Bratislava 84511 45, Slovakia

关键词: Fe-Zr intermetallics;    Amorphous alloys;    Crystallization kinetics;    Nanocrystalline alloys;    Mossbauer spectroscopy;   

DOI  :  10.1016/j.jallcom.2020.154021

来源: Elsevier

【 摘 要 】

Devitrification of mechanically alloyed amorphous Fe70Zr30 at. % compound consists on a two-step process: amorphous -> amorphous + bcc Fe + Fe2Zr -> Fe2Zr + Fe23Zr6. This sequence is inferred from the evolution of the Mossbauer spectra, the thermomagnetic experiments and the X-ray diffraction (XRD) patterns. Hyperfine parameters for both intermetallics have been obtained from Mossbauer spectroscopy in correlation with the phase identification from XRD results. The broadening of the stable compositional range of Fe2Zr intermetallic above 1000 K is responsible for a strong dependence of the phase fractions on heating and cooling rates. Despite the overlapping of the two processes involved in the devitrification, the individual Avrami exponents of each one have been estimated. (C) 2020 Elsevier B.V. All rights reserved.

【 授权许可】

Free