TITLE

Nanocrystallization mechanism of amorphous Fe78B13Si9

AUTHOR(S)
Sato, K.; Murakami, H.; Sprengel, W.; Schaefer, H.-E.; Kobayashi, Y.
PUB. DATE
April 2009
SOURCE
Applied Physics Letters;4/27/2009, Vol. 94 Issue 17, p171904
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The nanocrystallization mechanism of an amorphous alloy is discussed based on the kinetics of open nanospaces in Fe78B13Si9. There already exists a high concentration of Fe-enriched fluctuated sites with open nanospaces in the amorphous matrix. The structural and compositional fluctuation helps transient short-range Fe diffusion in the metastable amorphous matrix with an increase of temperature, triggering highly concentrated α-Fe nucleation. Along with the growth of α-Fe nucleus, Fe atoms are transferred from the intergranular amorphous phase to Fe-based nanocrystallites. The nanocrystallization of α-Fe is achieved through nucleation by short-range Fe diffusion and its growth by nanovoid-mediated long-range Fe diffusion.
ACCESSION #
38712364

 

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