Effects of magnetic field heat treatment on magnetic properties and microstructure of Sm2Co17-type sintered magnets

被引：4

作者：

Liu, Lian ^{[1
]}

Li, Yingchang ^{[2
]}

Yu, Nengjun ^{[1
]}

Ren, Zesong ^{[1
]}

Song, Chi ^{[1
]}

Pan, Minxiang ^{[1
]}

Yang, Hangfu ^{[1
]}

Wu, Qiong ^{[1
]}

Ge, Hongliang ^{[1
]}

Zhu, Minggang ^{[2
]}

Li, Wei ^{[2
]}

机构：

[1] China Jiliang Univ, Coll Mat & Chem, Hangzhou 310018, Peoples R China

[2] Cent Iron & Steel Res Inst, Div Funct Mat, Beijing 100081, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2024年 / 1005卷

基金：

中国国家自然科学基金;

关键词：

Magnetic field heat treatment; Lamellar phase; Element distribution; Sm2Co17-type sintered magnets; FERRITE TRANSFORMATION; COERCIVITY; IRON; CU; MICROCHEMISTRY; ALLOY; PHASE; CELL;

D O I：

10.1016/j.jallcom.2024.175985

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sm2Co17-type sintered magnets have attracted widespread attention for their excellent magnetic properties and thermal stability. The magnetic properties largely depend on the cellular structure and Cu, Fe distributions within these magnets. This paper systematically studies the effect of magnetic field heat treatment (MFHT) on the magnetic properties and microstructure of Sm2Co17-type sintered magnets. MFHT improves the roomtemperature magnetic properties and remanence temperature stability of magnets but slightly deteriorates the temperature coefficient of intrinsic coercivity. A microstructure analysis shows that MFHT improves the cell boundary phase content and optimizes the cellular structure and Cu, Fe distributions of magnets. A high-density short lamellar phase, possibly induced by MFHT, provides easy diffusion paths for Cu and Fe, thereby improving the magnetic properties of magnets. Compared with conventional aging treatment, this paper proposes a promising method to improve the magnetic properties of Sm2Co17-type sintered magnets under the same heat treatment time and temperature.

引用

页数：7

共 33 条

[1] Attractive-domain-wall-pinning controlled Sm-Co magnets overcome the coercivity-remanence trade-off [J].

Chen, Hansheng ;

Wang, Yunqiao ;

Yao, Yin ;

Qu, Jiangtao ;

Yun, Fan ;

Li, Yuqing ;

Ringer, Simon P. ;

Yue, Ming ;

Zheng, Rongkun .

ACTA MATERIALIA, 2019, 164 :196-206

[2] Effects of a strong magnetic field on the phase stability of plain carbon steels [J].

Choi, JK ;

Ohtsuka, H ;

Xu, Y ;

Choo, WY .

SCRIPTA MATERIALIA, 2000, 43 (03) :221-226

[3] Atomic structure and domain wall pinning in samarium-cobalt-based permanent magnets [J].

Duerrschnabel, M. ;

Yi, M. ;

Uestuener, K. ;

Liesegang, M. ;

Katter, M. ;

Kleebe, H-J ;

Xu, B. ;

Gutfleisch, O. ;

Molina-Lunal, L. .

NATURE COMMUNICATIONS, 2017, 8

[4] Influence of magnetic field on the kinetics of proeutectoid ferrite transformation in iron alloys [J].

Enomoto, M ;

Guo, H ;

Tazuke, Y ;

Abe, YR ;

Shimotomai, M .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2001, 32 (03) :445-453

[5] Direct evidence for Cu concentration variation and its correlation to coercivity in Sm(Co0.74Fe0.1Cu0.12Zr.04)7.4 ribbons [J].

Gopalan, R. ;

Hono, K. ;

Yan, A. ;

Gutfleisch, O. .

SCRIPTA MATERIALIA, 2009, 60 (09) :764-767

[6] Structural elongation and alignment in an Fe-0.4C alloy by isothermal ferrite transformation in high magnetic fields [J].

Hao, XJ ;

Ohtsuka, H ;

Wada, H .

MATERIALS TRANSACTIONS, 2003, 44 (12) :2532-2536

[7]

Larson A.C., 1997, LOS ALAMOS NATL LAB

[8] Phase separation and chemistry evolution in Fe-rich Sm (CobalFe0.31Cu0.07Zr0.025)7.7 magnets: The effect of initial defect [J].

Li, Qiangfeng ;

Wang, Chao ;

Lin, Zhongchong ;

Wang, Lei ;

Xiao, Yufei ;

Zhang, Peng ;

Cao, Xingzhong ;

Fang, Yikun ;

Liao, Qingliang ;

Yang, Jinbo ;

Zhang, Yue ;

Zhu, Minggang ;

Li, Wei .

ACTA MATERIALIA, 2023, 245

[9] Effect of iron on the high temperature magnetic properties and microstructure of Sm(Co,Fe,Cu,Zr)z permanent magnets [J].

Liu, JF ;

Ding, Y ;

Hadjipanayis, GC .

JOURNAL OF APPLIED PHYSICS, 1999, 85 (03) :1670-1674

[10] GENESIS OF THE CELL MICROSTRUCTURE IN THE SM(CO, FE, CU, ZR) PERMANENT-MAGNETS WITH 2/17 TYPE [J].

MAURY, C ;

RABENBERG, L ;

ALLIBERT, CH .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1993, 140 (01) :57-72

← 1 2 3 4 →