Mechanosynthesis of intermetallic Fe100-xAlx obtained by reduction of Al/Fe2O3 composite

被引：15

作者：

Goya, GF ^{[1
]}

Rechenberg, HR ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2000年 / 12卷 / 50期

关键词：

D O I：

10.1088/0953-8984/12/50/318

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

AlxFe100-x alloy has been obtained through mechanical alloying of Al + Fe2O3 under an argon atmosphere. The resulting phase has a composition dose to Al30Fe70 with disordered body-centred cubic structure and cell parameter a = 2.892(4) Angstrom. The magnetic properties studied by Mossbauer and magnetization measurements are consistent with an x similar to 30 composition. Annealing at 983 K produces only minor changes in the magnetic properties. A possible mechanism for formation of AlxFe100-x is suggested, consisting of(a) initial grain downsizing to nanometric scale and (b) subsequent decomposition of alpha -Fe2O3 producing metallic iron that is dissolved into the Al matrix. In contrast, no new phases were produced in a twin experiment on ball-milled Fe + Al2O3, carried out under identical milling conditions.

引用

页码：10579 / 10590

页数：12

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