DISPROPORTIONATION IN ND16FE76B8-TYPE HYDRIDES

被引：77

作者：

MCGUINESS, PJ

ZHANG, XJ

FORSYTH, H

HARRIS, IR

机构：

[1] School of Metallurgy and Materials, The University of Birmingham, Birmingham, B152TT

来源：

JOURNAL OF THE LESS-COMMON METALS | 1990年 / 162卷 / 02期

关键词：

D O I：

10.1016/0022-5088(90)90353-L

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：

This work has shown that heating Nd16Fe76B8-type materials in a hydrogen atmosphere, with subsequent vacuum annealing at greater than 750°C produces coercive powders which are suitable for the production of polymer-bonded magnets. A study of the material at different stages of the process has confirmed that the Nd-Fe-B alloy disproportionates into iron, Fe2B and neodymium hydride before recombining during the vacuum annealing stage to produce the fine-grained microstructure necessary for highly coercive material. The grain size of the final microstructure has been found to be very dependent on the temperature at which the hydrogenation-disproportionation-desorption cycle is carried out with optimum properties for the Nd16Fe76B8 alloy being obtained for a desorption temperature of 785°C for 1 h. © 1990.

引用

页码：379 / 387

页数：9

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