Wetting of grain boundaries in hard-magnetic Nd-Fe-B alloys

被引：20

作者：

Kucheev, Yu. O. ^{[1
,2
]}

Straumal, A. B. ^{[1
,2
]}

Mogil'nikova, I. V. ^{[1
,2
]}

Straumal, B. B. ^{[1
,2
]}

Gusak, A. M. ^{[3
]}

Baretzky, B. ^{[4
]}

机构：

[1] Natl Univ Sci & Technol MISIS, Moscow 119049, Russia

[2] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow Oblast, Russia

[3] Cherkasy Natl Univ, Dept Theoret Phys, UA-18027 Cherkassy, Ukraine

[4] Karlsruhe Inst Technol, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany

来源：

RUSSIAN JOURNAL OF NON-FERROUS METALS | 2012年 / 53卷 / 06期

关键词：

grain boundaries; Nd-Fe-B alloys; hard-magnetic alloys; CORROSION-RESISTANCE; PHASE-TRANSITIONS; ZN-SN; INTERFACIAL-TENSIONS; INTERGRANULAR FILMS; SINTERED MAGNETS; SOLID-PHASE; MICROSTRUCTURE; SEGREGATION; ZINC;

D O I：

10.3103/S106782121206003X

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Samples of Nd-Fe-B alloys, which have been the main hard-magnetic materials with the highest magnetic energy since the end of the 1980s, are investigated. Magnets based on them are obtained by liquid-phase sintering or spin coating. In this article, wetting of the Nd2Fe14B grains by the neodymium-enriched liquid phase is investigated. The microstructure of the Fe-12.3 at %Nd-7.6 at %B alloy quenched after annealing at T = 700-1100A degrees C in the presence of a neodymium-enriched melt is studied. The acquired data indicate that the transition from incomplete to complete wetting of grain boundaries occurs as the temperature increases. The results are compared with the reference data for alloys of the Nd-Fe-B system obtained by liquid-phase sintering. The relation between the wetting phase transition of grain boundaries and magnetic properties is also discussed.

引用

页码：450 / 456

页数：7

共 78 条

[41] GRAIN-BOUNDARIES - PHASE-TRANSITIONS AND CRITICAL PHENOMENA [J].

RABKIN, EI ;

SHVINDLERMAN, LS ;

STRAUMAL, BB .

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 1991, 5 (19) :2989-3028

[42] Experimental observation of critical wetting [J].

Ragil, K ;

Meunier, J ;

Broseta, D ;

Indekeu, JO ;

Bonn, D .

PHYSICAL REVIEW LETTERS, 1996, 77 (08) :1532-1535

[43] Observation of short-range critical wetting [J].

Ross, D ;

Bonn, D ;

Meunier, J .

NATURE, 1999, 400 (6746) :737-739

[44] NEW MATERIAL FOR PERMANENT-MAGNETS ON A BASE OF ND AND FE [J].

SAGAWA, M ;

FUJIMURA, S ;

TOGAWA, N ;

YAMAMOTO, H ;

MATSUURA, Y .

JOURNAL OF APPLIED PHYSICS, 1984, 55 (06) :2083-2087

[45]

Schick M., 1990, P LES HOUCH SESS 48, P416

[46]

SCHNEIDER G, 1986, Z METALLKD, V77, P755

[47] Grain boundary grooving as an indicator of grain boundary phase transformations [J].

Schölhammer, J ;

Baretzky, B ;

Gust, W ;

Mittemeijer, E ;

Straumal, B .

INTERFACE SCIENCE, 2001, 9 (1-2) :43-53

[48] PREPARATION OF FE-SI SINGLE-CRYSTALS AND BICRYSTALS FOR DIFFUSION EXPERIMENTS BY THE ELECTRON-BEAM FLOATING-ZONE TECHNIQUE [J].

SEMENOV, VN ;

STRAUMAL, BB ;

GLEBOVSKY, VG ;

GUST, W .

JOURNAL OF CRYSTAL GROWTH, 1995, 151 (1-2) :180-186

[49] Effect of Ga addition on the microstructure and magnetic properties of hydrogenation-disproportionation-desorption-recombination processed Nd-Fe-B powder [J].

Sepehri-Amin, H. ;

Li, W. F. ;

Ohkubo, T. ;

Nishiuchi, T. ;

Hirosawa, S. ;

Hono, K. .

ACTA MATERIALIA, 2010, 58 (04) :1309-1316

[50] A fast-spectrum test reactor concept [J].

Shatilla, YA ;

Loewen, EP .

NUCLEAR TECHNOLOGY, 2005, 151 (03) :239-249

← 1 2 3 4 5 6 7 8 →