The composition effect on the nanocrystallization of FINEMET amorphous alloys

Book · Mon Sep 01 00:00:00 EDT 1997

OSTI ID:522318

Zhu, J; Clavaguera-Mora, M T ^[1]; Pradell, T ^[2]; Clavaguera, N ^[3]

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1. Univ. Autonoma de Barcelona (Spain)
2. Univ. Politecnica de Catalunya, Barcelona (Spain)
3. Univ. de Barcelona (Spain)

Differential Scanning Calorimetry (DSC), X-ray Diffraction (XRD), Neutron Diffraction (ND) and Moessbauer Spectroscopy (MS) were used to study the nanocrystallization process of Fe{sub 73.5}Cu{sub 1}Nb{sub 3}Si{sub 22.5{minus}x}B{sub x} (x = 5, 7, 8, 9 and 12) amorphous alloys. Both the temperature range and the activation energy of Fe(Si) phase precipitation from the amorphous matrix increase with the initial B composition. The initial Si composition influences the mechanism of the nanocrystallization: for the Si rich samples, the beginning of nucleation and growth processes is interface controlled, for the B rich samples it is diffusion controlled. Secondary crystallization from the remaining amorphous is mainly Fe{sub 3}B and Fe{sub 2}B, the ratio of Fe{sub 3}B/Fe{sub 2}B being dependent on the initial composition too.

• OSTI ID: 522318
• Report Number(s): CONF-961202--; ISBN 1-55899-361-4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACTIVATION ENERGY
BORON ALLOYS
CHEMICAL COMPOSITION
COPPER ALLOYS
CRYSTALLIZATION
EXPERIMENTAL DATA
IRON ALLOYS
IRON BORIDES
LATTICE PARAMETERS
NIOBIUM ALLOYS
PHASE STUDIES
PRECIPITATION
SILICON ALLOYS