A study on the corrosion behavior of the (Nd, MM)2(Fe, Co, Ni)14B-type sintered magnets

被引：20

作者：

Hosseini, H. R. Madaah ^{[1
]}

Dadoo, A. ^{[1
]}

Dolati, A. ^{[1
]}

Kianvash, A. ^{[1
]}

机构：

[1] Sharif Univ Technol, Dept Mat Sci & Engn, Tehran, Iran

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 419卷 / 1-2期

关键词：

corrosion; permanent magnets; Nd-Fe-B; sintering;

D O I：

10.1016/j.jallcom.2005.10.013

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：

The binary powder blending technique (BPBT) was employed in production of anisotropic (Nd, MM)2(Fe, Co, Ni)14B-type sintered magnets (MM: denotes a Misch-metal). The composition of the master alloy was close to the stoichiometric Nd2Fe14B compound, while the sintering aid (SA) had a composition of MM38.1Co46.4Ni15.4. The magnets were made by blending different ratios of the master alloy and the sintering aid. The corrosion behavior of these magnets was compared with that of the Nd17Fe75B8 base alloy by potentiodynamic polarization measurements in H2SO4 solution. By decreasing the amount of Nd-rich grain boundary phases and substitution of some Fe atoms by Co and Ni, an improvement in the corrosion resistance of the magnets was observed. The Ndl1.9MM2.9Fe73.9Co3.3Ni1.1B6.9 compound exhibited the minimum corrosion rate within this investigation. © 2005 Elsevier B.V. All rights reserved.

引用

页码：337 / 341

页数：5

共 12 条

[1]

[Anonymous], ANN BOOK ASTM STANDA, V03

[2]

BALA H, 1990, P 11 INT CORR C FLOR, V5, P143

[3] CORROSION OF NDFEB PERMANENT-MAGNETS IN HUMID ENVIRONMENTS AT TEMPERATURES UP TO 150-DEGREES-C [J].