On the formation of nanocrystals in the soft magnetic alloy Fe73.5Nb3Cu1Si13.5B9

被引：152

作者：

Ayers, JD ^{[1
]}

Harris, VG ^{[1
]}

Sprague, JA ^{[1
]}

Elam, WT ^{[1
]}

Jones, HN ^{[1
]}

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

来源：

ACTA MATERIALIA | 1998年 / 46卷 / 06期

关键词：

D O I：

10.1016/S1359-6454(97)00436-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Studies were conducted on alloys of atomic mass composition Fe73.5Nb3Cu1Si13.5B9 and Fe76.5Cu1Si13.5B9 TEM studies demonstrated that Fe-rich nanocrystals precipitated from the amorphous starting materials exhibited the DO, structure from very early in the transformation process. This result was corroborated by extended X-ray absorption fines structure (EXAFS) studies which showed evidence of ordering in the Fe-rich precipitates from early in the transformation process. EXAFS studies also showed that Cu clusters with near-f.c.c. structure were present from very early stages of the crystallization process. A model is proposed which describes the role of the Cu clusters as catalyzing nucleation of the DO3 crystallites by providing a low energy interface upon which the activation energy for nucleation of the DO3 phase is lowered. (C) 1998 Acta Metallurgica Inc.

引用

页码：1861 / 1874

页数：14

共 31 条

[1] THE LOCAL ATOMIC ORDER OF CU AND FE IN HEAT-TREATED FE73.5NB3CU1SI13.5B9 RIBBONS [J].