Synthesis and characterization of FeCoNiAl nanocapsules by plasma arc discharge process

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	Synthesis and characterization of FeCoNiAl nanocapsules by plasma arc discharge process
	D. Y. Geng; W. Y. Park; J. C. Kim; J. H. Yu; C. J. Choi; Z. D. Zhang
	2005
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	20 期号:9 页码:2534-2543
摘要	A series of magnetic FeCoNiAl nanocapsules was synthesized by the plasma arc discharge method; the targets of Fe, Co, Ni, and Al powders were changed with varying compositions. The compositions of the nanocapsules were found to be quite different from those of the corresponding targets; the relative amount of Al (or Ni, Co) to Fe was increased (or decreased). Structures, particles sizes, composition, surface composition, magnetic properties, and thermal stability of the nanocapsules were investigated. The saturation magnetization M-s = 106.8 emu/g and coercive force H-i(c) = 367 Oe were achieved for the nanocapsules with the Fe62.5Co21Ni13Al2.5 target. In the FeCoNiAl nanocapsules, the binding energies of Fe, Co, and Ni were different from those of the metals Fe, Co, and Ni. The binding energies of Fe2p3/2 and Fe2pl/2 of the nanocapsules were 708.2 and 721.3 eV, respectively. The four-layer structure was proposed to give a clear statement of how the composition and phase varied radially in the nanocapsules. The major contents of the four layers-i.e., the outer shell, the inner shell, the outer core and the inner core-were amorphous alumina, crystalline alumina, transition metal oxides, and transition metal alloy, respectively. The compositions, structures, particle size, and grain size of the nanocapsules all affect their magnetic properties. In the FeCoNiAl nanocapsules, the greater th amount of the body-centered-cubic phase, the stronger the ferromagnetic magnetic properties.
部门归属	korea inst machinery & mat, kyungnam 641010, south korea. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;geng, dy (reprint author), korea inst machinery & mat, kyungnam 641010, south korea;dygeng@imr.ac.cn
关键词	Coated Fe-co(c) Nanocapsules Magnetic-properties Metal Reaction Fe Particles Nanoparticles Methane Iron
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WOS记录号	WOS:000231648900039
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34851
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. Y. Geng,W. Y. Park,J. C. Kim,et al. Synthesis and characterization of FeCoNiAl nanocapsules by plasma arc discharge process[J]. Journal of Materials Research,2005,20(9):2534-2543.
APA	D. Y. Geng,W. Y. Park,J. C. Kim,J. H. Yu,C. J. Choi,&Z. D. Zhang.(2005).Synthesis and characterization of FeCoNiAl nanocapsules by plasma arc discharge process.Journal of Materials Research,20(9),2534-2543.
MLA	D. Y. Geng,et al."Synthesis and characterization of FeCoNiAl nanocapsules by plasma arc discharge process".Journal of Materials Research 20.9(2005):2534-2543.