Journal
INTERMETALLICS
Volume 67, Issue -, Pages 171-176Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2015.08.014
Keywords
High entropy alloy; Magnetic property Anisotropy; Crystal growth
Categories
Funding
- National High Technology Research and Development Program of China [2009AA03Z113]
- National Science Foundation of China [51471025, 51210105006]
- 111 Project [B07003]
- Program for Changjiang Scholars and the Innovative Research Team of the University
- US National Science Foundation [CMMI-1100080]
- U.S. Department of Energy, United States (DOE), Office of Fossil Energy, National Energy Technology Laboratory [DE-FE-0008855, DE-FE-0011194, DE-FE-0024054]
- US Army Research Office [W911NF-13-1-0438]
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The non-equiatomic FeCoNiAlSi alloy is prepared by the Bridgman solidification (BS) technique at different withdrawal velocities (V = 30, 100, and 200 pm/s). Various characterization techniques have been used to study the microstructure and crystal orientation. The morphological evolutions accompanying the crystal growth of the alloy prepared at different withdrawal velocities are nearly the same, from equiaxed grains to columnar crystals. The transition of coercivity is closely related to the local microstructure, while the saturation magnetization changes little at different sites. The coercivity can be significantly reduced from the equiaxed grain area to the columnar crystal area when the applied magnetic field direction is parallel to the crystal growth direction, no matter what is the withdrawal velocity. In addition, the alloy possesses magnetic anisotropy when the applied magnetic field is in different directions. (C) 2015 Elsevier Ltd. All rights reserved.
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