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Modulating the crystallization process of Fe82B12C6 amorphous alloy via rapid annealing.
- Source :
-
Journal of Alloys & Compounds . May2019, Vol. 785, p328-334. 7p. - Publication Year :
- 2019
-
Abstract
- Abstract Crystallization is a uniform behavior for amorphous alloys while it can be fairly complex. For Fe-B-C alloys with high Fe content, the precipitation of α-Fe is ahead of the Fe-metalloid compounds with temperature increasing. It is found that the crystallization products of Fe-B-C amorphous alloys with Fe content lower than 82% can be modulated by appropriate annealing. The Fe 82 B 12 C 6 alloy is eutectoidally crystallized with the simultaneous precipitation of α-Fe and Fe-metalloid compounds under conventional annealing. It is a diffusion controlled three-dimensionally growth with a constant nucleation rate. However, only α-Fe nanocrystals with a low volume fraction form under rapid annealing, which is evidenced by the results of X-ray and electron diffractions along with the magnetometry. The transmission electron microscopy bright-field images show that the α-Fe nanocrystals obtained by rapid annealing have two different morphologies. One is dendritic with a large characteristic length and the other is equiaxed-like. Highlights • Single α-Fe phase is obtained under suitable rapid annealing for Fe 82 B 12 C 6 alloy. • The α-Fe nanocrystals obtained by rapid annealing have two different morphologies. • The coercivity is drastically reduced due to the absence of hard magnetic phase. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 785
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 135104613
- Full Text :
- https://doi.org/10.1016/j.jallcom.2019.01.209