Magnetic and structural studies of mechanically alloyed (Fe50Co50)62Nb8B30 powder mixtures

被引：35

作者：

Alleg, S. ^{[1
]}

Azzaza, S. ^{[1
]}

Bensalem, R. ^{[1
]}

Sunol, J. J. ^{[2
]}

Khene, S.

Fillion, G. ^{[3
]}

机构：

[1] Univ Annaba, Fac Sci, Dept Phys, Lab Magnetisme & Spect Solides, Annaba 23000, Algeria

[2] Univ Girona, Dep Fis, Girona 17071, Spain

[3] CNRS, Inst Neel, Dept Nano, F-38042 Grenoble 9, France

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 482卷 / 1-2期

关键词：

Nanostructured materials; Mechanical alloying; Amorphization; Magnetic measurements; Calorimetry; X-ray diffraction; FE; DEPENDENCE;

D O I：

10.1016/j.jallcom.2009.03.189

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：

Amorphous (Fe50Co50)(62)Nb8B30 powder mixture was prepared by mechanical alloying from elemental Fe, Co, B and Nb powders in a planetary ball mill under argon atmosphere. Structural, thermal and magnetic properties were performed on the milled powders by means of X-ray diffraction, differential scanning calorimetry and magnetic measurements. The amorphous state is reached after 125 h of milling. The excess enthalpy due to the high density of defects is released at temperature below 300 degrees C. Crystallisation and growth of crystal domains are the dominating processes at high temperatures. The saturation magnetisation decreases rapidly during the first 25 h of milling to about 15.24 A m(2)/kg and remains nearly constant on further milling. Coercivity, H-c, value of about 160 Oe is obtained after 125 h of milling. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：86 / 89

页数：4

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