Mechanical alloying of iron-hematite powders

被引：30

作者：

Ding, J ^{[1
]}

Miao, WF ^{[1
]}

Pirault, E ^{[1
]}

Street, R ^{[1
]}

McCormick, PG ^{[1
]}

机构：

[1] Univ Western Australia, Special Res Ctr Adv Mineral & Mat Proc, Perth, WA 6907, Australia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1998年 / 267卷 / 1-2期

关键词：

mechanical alloying; nanocomposites; magnetic properties; non-equilibrium phases;

D O I：

10.1016/S0925-8388(97)00502-1

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 structure and magnetic properties of mechanically alloyed and heat treated xFe.(1-x)Fe2O3 powders have been investigated. As-milled powders had a nanocrystalline structure with a particle size of 5-10 nm and consisted of Fe2O3 and Fe3O4 for x less than or equal to 0.2, Fe3O4 and FeO for x=0.2-0.5 and FeO and Fe for x greater than or equal to 5.0. Nanocrystalline metastable FeO decomposed into nanocrystalline Fe3O4 and Fe after annealing at 250-400 degrees C and reformed again to submicron FeO after annealing at temperatures above 550 degrees C. Nanocomposites of Fe3O4/Fe obtained by decomposition after annealing at similar to 300 degrees C exhibited high values of magnetisation and coercivity. (C) 1998 Elsevier Science S.A.

引用

页码：199 / 204

页数：6

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