Published December 2, 2015
| Version v1
Publication
Crystallization behavior and magnetic properties of Cu-containing Fe- Cr- Mo- Ga- P- C- B alloys
Description
Multicomponent Fe65.5Cr4Mo4Ga4P12C5B5.5 amorphous alloy is known to have good soft magnetic
properties combined with large glass-forming ability. Searching for a nanocrystalline structure that
could improve its magnetic properties, Cr and Mo were partially substituted by Cu. The
devitrification process of Cu-containing alloys shows an additional broad crystallization event that
can be described by an Avrami law, with an exponent close to unity, typical for nanocrystallization
phenomena. The microstructure of the nanocrystalline alloys consists of Fe Ga nanocrystals with a
mean grain size of 5–10 nm embedded in an amorphous matrix. The maximum crystalline volume
fraction achieved at the end of the nanocrystallization process was found to be of around 20% and
for alloys with high Cu content a number of crystals of larger size 40 nm were observed. The
combined use of x-ray diffraction and Mössbauer spectrometry allowed to estimate the compositions
of both the nanocrystalline grains and the amorphous residual phase of nanocrystalline alloys. The
complex hyperfine structure of the studied alloys at the end of the nanocrystallization process was
characterized. ©
Abstract
The Spanish Goverment and EU-FEDER MAT2004-04618Abstract
The PAI of the Junta de AndaluciaAdditional details
Identifiers
- URL
- https://idus.us.es/handle/11441/31409
- URN
- urn:oai:idus.us.es:11441/31409