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Indexed by:期刊论文

Date of Publication:2019-03-01

Journal:JOURNAL OF MATERIALS SCIENCE

Included Journals:SCIE、Scopus

Volume:54

Issue:5

Page Number:4400-4408

ISSN No.:0022-2461

Key Words:Amorphous alloys; Copper alloys; Grain refinement; Nanocrystals; Nanomagnetics; Nanoparticles, Amorphous matrices; Amorphous phase; Annealed alloys; Crystallization process; Effective permeability; Fe nanoparticles; Magnetic softness; Number density, Nanocrystalline alloys

Abstract:The increase in Cu content from 1.0 to 1.7 at.% changes the as-spun Fe86-xSi2B8P4Cux and Fe84-yMn2Si2B8P4Cuy alloys from a single amorphous phase to a composite of -Fe nanoparticles dispersing in amorphous matrix and significantly refines the nanostructure and improves the magnetic softness of the annealed alloys. The as-spun Fe82.3Mn2Si2B8P4Cu1.7 amorphous alloy containing high number density -Fe nanoparticles forms uniform nanostructure with fine -Fe grains in an average size of 17nm after annealing and exhibits low coercivity of 8.4 Am-1 and high effective permeability of 15000 at 1kHz, which are superior to those of 38nm, 85.4 Am-1 and 1400, respectively, for the Fe83Mn2Si2B8P4Cu1 amorphous alloy. The mechanism relating to the effect of Cu content on the grain refinement was discussed in terms of the as-spun structure and crystallization process of the alloys.