Mechanism of active dissolution of nanocrystalline Fe[sbnd]Si[sbnd]B[sbnd]P[sbnd]Cu soft magnetic alloys

Zhenhua Dan; Fengxiang Qin; Yan Zhang; Akihiro Makino; Hui Chang; Nobuyoshi Hara

doi:10.1016/j.matchar.2016.08.012

Mechanism of active dissolution of nanocrystalline Fe[sbnd]Si[sbnd]B[sbnd]P[sbnd]Cu soft magnetic alloys

Zhenhua Dan, Fengxiang Qin, Yan Zhang, Akihiro Makino, Hui Chang, Nobuyoshi Hara

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

Nanocrystalline Fe_83.3Si₃B₁₀P₃Cu_0.7 alloys have a heterogeneous microstructure consisting of α-Fe nanocrystals with an average size of few tenths of nanometers and an amorphous residual phase. Nanocrystalline alloy annealed at 698 K has a saturated magnetic flux density of 1.81 T and coercivity of 11.8 A m^{− 1}. Its hetero-amorphous microstructure undergoes active dissolution in H₂SO₄, and α-Fe grains are preferentially dissolved in the form of micro-coupling cells between anodic α-Fe grains and cathodic amorphous residue and Cu clusters. Because the P enrichment in the residual phases inhibits the anodic dissolution of Fe and the α-Fe grains act as sacrificial anodes, the amorphous residual phases do not readily dissolve. The final residual phase is amorphous and has a nanoporous structure with a pore size similar to that of the precipitated α-Fe grains after annealing. The active dissolution behavior is determined by the microstructure of nanocrystalline Fe_83.3Si₃B₁₀P₃Cu_0.7 alloys.

Original language	English
Pages (from-to)	9-16
Number of pages	8
Journal	Materials Characterization
Volume	121
DOIs	https://doi.org/10.1016/j.matchar.2016.08.012
Publication status	Published - 2016 Nov 1

Keywords

Active dissolution
Amorphous residue
Micro-coupling
Nanocrystalline Fe-based alloy
Nanoporous structure
Soft-magnetic alloy

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matchar.2016.08.012

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title = "Mechanism of active dissolution of nanocrystalline Fe[sbnd]Si[sbnd]B[sbnd]P[sbnd]Cu soft magnetic alloys",

abstract = "Nanocrystalline Fe83.3Si3B10P3Cu0.7 alloys have a heterogeneous microstructure consisting of α-Fe nanocrystals with an average size of few tenths of nanometers and an amorphous residual phase. Nanocrystalline alloy annealed at 698 K has a saturated magnetic flux density of 1.81 T and coercivity of 11.8 A m− 1. Its hetero-amorphous microstructure undergoes active dissolution in H2SO4, and α-Fe grains are preferentially dissolved in the form of micro-coupling cells between anodic α-Fe grains and cathodic amorphous residue and Cu clusters. Because the P enrichment in the residual phases inhibits the anodic dissolution of Fe and the α-Fe grains act as sacrificial anodes, the amorphous residual phases do not readily dissolve. The final residual phase is amorphous and has a nanoporous structure with a pore size similar to that of the precipitated α-Fe grains after annealing. The active dissolution behavior is determined by the microstructure of nanocrystalline Fe83.3Si3B10P3Cu0.7 alloys.",

keywords = "Active dissolution, Amorphous residue, Micro-coupling, Nanocrystalline Fe-based alloy, Nanoporous structure, Soft-magnetic alloy",

author = "Zhenhua Dan and Fengxiang Qin and Yan Zhang and Akihiro Makino and Hui Chang and Nobuyoshi Hara",

note = "Funding Information: This work was partially supported the National Natural Science Foundation of China Grant No. 51301091 , The Scientific Research Foundation for the Returned Overseas Chinese Scholars , State Education Ministry , and the Natural Science Foundation of Jiangsu Province Grant No. BK20151536 , and “Tohoku Innovative Materials Technology Initiatives for Reconstruction (TIMT)” funded by the Ministry of Education, Culture, Sports, Science and Technology ( MEXT ) and Reconstruction Agency, Japan . Publisher Copyright: {\textcopyright} 2016 Elsevier Inc.",

year = "2016",

month = nov,

day = "1",

doi = "10.1016/j.matchar.2016.08.012",

language = "English",

volume = "121",

pages = "9--16",

journal = "Materials Characterization",

issn = "1044-5803",

publisher = "Elsevier Inc.",

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T1 - Mechanism of active dissolution of nanocrystalline Fe[sbnd]Si[sbnd]B[sbnd]P[sbnd]Cu soft magnetic alloys

AU - Dan, Zhenhua

AU - Qin, Fengxiang

AU - Zhang, Yan

AU - Makino, Akihiro

AU - Chang, Hui

AU - Hara, Nobuyoshi

N1 - Funding Information: This work was partially supported the National Natural Science Foundation of China Grant No. 51301091 , The Scientific Research Foundation for the Returned Overseas Chinese Scholars , State Education Ministry , and the Natural Science Foundation of Jiangsu Province Grant No. BK20151536 , and “Tohoku Innovative Materials Technology Initiatives for Reconstruction (TIMT)” funded by the Ministry of Education, Culture, Sports, Science and Technology ( MEXT ) and Reconstruction Agency, Japan . Publisher Copyright: © 2016 Elsevier Inc.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - Nanocrystalline Fe83.3Si3B10P3Cu0.7 alloys have a heterogeneous microstructure consisting of α-Fe nanocrystals with an average size of few tenths of nanometers and an amorphous residual phase. Nanocrystalline alloy annealed at 698 K has a saturated magnetic flux density of 1.81 T and coercivity of 11.8 A m− 1. Its hetero-amorphous microstructure undergoes active dissolution in H2SO4, and α-Fe grains are preferentially dissolved in the form of micro-coupling cells between anodic α-Fe grains and cathodic amorphous residue and Cu clusters. Because the P enrichment in the residual phases inhibits the anodic dissolution of Fe and the α-Fe grains act as sacrificial anodes, the amorphous residual phases do not readily dissolve. The final residual phase is amorphous and has a nanoporous structure with a pore size similar to that of the precipitated α-Fe grains after annealing. The active dissolution behavior is determined by the microstructure of nanocrystalline Fe83.3Si3B10P3Cu0.7 alloys.

AB - Nanocrystalline Fe83.3Si3B10P3Cu0.7 alloys have a heterogeneous microstructure consisting of α-Fe nanocrystals with an average size of few tenths of nanometers and an amorphous residual phase. Nanocrystalline alloy annealed at 698 K has a saturated magnetic flux density of 1.81 T and coercivity of 11.8 A m− 1. Its hetero-amorphous microstructure undergoes active dissolution in H2SO4, and α-Fe grains are preferentially dissolved in the form of micro-coupling cells between anodic α-Fe grains and cathodic amorphous residue and Cu clusters. Because the P enrichment in the residual phases inhibits the anodic dissolution of Fe and the α-Fe grains act as sacrificial anodes, the amorphous residual phases do not readily dissolve. The final residual phase is amorphous and has a nanoporous structure with a pore size similar to that of the precipitated α-Fe grains after annealing. The active dissolution behavior is determined by the microstructure of nanocrystalline Fe83.3Si3B10P3Cu0.7 alloys.

KW - Active dissolution

KW - Amorphous residue

KW - Micro-coupling

KW - Nanocrystalline Fe-based alloy

KW - Nanoporous structure

KW - Soft-magnetic alloy

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JF - Materials Characterization

ER -

Mechanism of active dissolution of nanocrystalline Fe[sbnd]Si[sbnd]B[sbnd]P[sbnd]Cu soft magnetic alloys

Abstract

Keywords

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