Effect of Cu on microstructural evolution of nanocrystalline soft and hard magnetic materials

被引：4

作者：

Hono, K ^{[1
]}

Ping, DH ^{[1
]}

Hirosawa, S ^{[1
]}

机构：

[1] Natl Res Inst Met, Tsukuba, Ibaraki 3050047, Japan

来源：

ADVANCED HARD AND SOFT MAGNETIC MATERIALS | 1999年 / 577卷

关键词：

D O I：

10.1557/PROC-577-507

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The nanocrystallization processes in Fe-Si-B-Nb-Cu and Fe-Nd-B(-Cu-Nb) amorphous alloys have been studied by transmission electron microscopy (TEM) and a three dimensional atom probe (3DAP). Cu additions are effective in refining the nanocrystalline microstructures of both alloys, because Cu atom clusters formed prior to the crystallization reaction serve as heterogeneous nucleation sites for the primary crystals. However, the clustering behaviors of Cu atoms in these two alloy systems are different, i.e., Cu completely dissolves in the Nd2Fe14B phase in the final microstructure of the Nd4.5Fe75.8B18.5Cu0.2Nb1 alloy, whereas Cc clusters grow to fcc-Cu particles in the Fe73.5Si13.5B9Nb3Cu1 alloy. The nanocrystallization processes in these two alloys clarified by the 3DAP results are compared.

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页码：507 / 517

页数：11

相关论文

共 21 条

[1] On the formation of nanocrystals in the soft magnetic alloy Fe73.5Nb3Cu1Si13.5B9 [J].

Ayers, JD ;

Harris, VG ;

Sprague, JA ;

Elam, WT ;

Jones, HN .

ACTA MATERIALIA, 1998, 46 (06) :1861-1874

[2] THE TOMOGRAPHIC ATOM-PROBE - A QUANTITATIVE 3-DIMENSIONAL NANOANALYTICAL INSTRUMENT ON AN ATOMIC-SCALE [J].

BLAVETTE, D ;

DECONIHOUT, B ;

BOSTEL, A ;

SARRAU, JM ;

BOUET, M ;

MENAND, A .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1993, 64 (10) :2911-2919

[3] MELTSPUN PERMANENT-MAGNET MATERIALS CONTAINING FE3B AS THE MAIN PHASE [J].

COEHOORN, R ;

DEMOOIJ, DB ;

DEWAARD, C .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1989, 80 (01) :101-104

[4]

HAMANO M, 1998, P 15 INT WORKSH RAR, P199

[5] GRAIN-STRUCTURE AND MAGNETISM OF NANOCRYSTALLINE FERROMAGNETS [J].

HERZER, G .

IEEE TRANSACTIONS ON MAGNETICS, 1989, 25 (05) :3327-3329

[6] Nanostructure and magnetic properties of chromium-doped Fe3B-Nd2Fe14B exchange-coupled permanent magnets [J].

Hirosawa, S ;

Kanekiyo, H .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1996, 217 :367-370

[7] HIGH-COERCIVITY IRON-RICH RARE-EARTH PERMANENT-MAGNET MATERIAL BASED ON (FE, CO)3B-ND-M (M=AL, SI, CU, GA, AG, AU) [J].

HIROSAWA, S ;

KANEKIYO, H ;

UEHARA, M .

JOURNAL OF APPLIED PHYSICS, 1993, 73 (10) :6488-6490

[8] Cu clustering and Si partitioning in the early crystallization stage of an Fe73.5Si13.5B9Nb3Cu1 amorphous alloy [J].

Hono, K ;

Ping, DH ;

Ohnuma, M ;

Onodera, H .

ACTA MATERIALIA, 1999, 47 (03) :997-1006

[9] ATOM-PROBE STUDY OF THE CRYSTALLIZATION PROCESS OF AN FE73.5SI13.5B9NB3CU1 AMORPHOUS ALLOY [J].

HONO, K ;

LI, JL ;

UEKI, Y ;

INOUE, A ;

SAKURAI, T .

APPLIED SURFACE SCIENCE, 1993, 67 (1-4) :398-406

[10] THE MICROSTRUCTURE EVOLUTION OF A FE73.5SI13.5B9NB3CU1 NANOCRYSTALLINE SOFT MAGNETIC MATERIAL [J].

HONO, K ;

HIRAGA, K ;

WANG, Q ;

INOUE, A ;

SAKURAI, T .

ACTA METALLURGICA ET MATERIALIA, 1992, 40 (09) :2137-2147