Effect of decomposition of the Cr-Fe-Co rich phase of AlCoCrCuFeNi high entropy alloy on magnetic properties

被引：122

作者：

Singh, S. ^{[1
]}

Wanderka, N. ^{[1
]}

Kiefer, K. ^{[1
]}

Siemensmeyer, K. ^{[1
]}

Banhart, J. ^{[1
]}

机构：

[1] Helmholtz Zentrum Berlin Mat & Energie GmbH, D-14109 Berlin, Germany

来源：

ULTRAMICROSCOPY | 2011年 / 111卷 / 06期

关键词：

High entropy alloys; TEM analysis; 3D-AP measurements; Magnetisation; SPINODAL DECOMPOSITION; MICROSTRUCTURE; SYSTEM;

D O I：

10.1016/j.ultramic.2010.12.001

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

Splat-quenched, as-cast and aged (2 h at 600 degrees C after casting) AlCoCrCuFeNi high entropy alloys were investigated by means of transmission electron microscopy and three-dimensional atom probe (3D-AP). 3D-AP revealed anti-correlated fluctuations of the Cr and Fe-Co compositions in Cr-Fe-Co-rich regions of the as-cast alloy. The ferromagnetic behavior of AlCoCrCuFeNi high entropy alloy was correlated with the decomposition of the Cr-Fe-Co-rich regions into ferromagnetic Fe-Co-rich and antiferromagnetic Cr-rich domains, the size of which was determined by statistical analysis of 3D-AP data. The splat-quenched alloy showed a softer magnetic behavior as compared to the as-cast and aged alloys. The aged alloy possessed a higher saturation magnetization and coercivity as compared to the as-cast alloy. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：619 / 622

页数：4

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