Structural, thermal and hyperfine properties of Fe75Se25 powders prepared by mechanical alloying

被引：2

作者：

Chebli, A. ^{[1
]}

Djekoun, A. ^{[1
]}

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

Niznansky, D. ^{[3
]}

机构：

[1] Univ Badji Mokhtar, Fac Sci, Lab Magnetisme & Spectroscopie Solides, BP 12, Annaba 23000, Algeria

[2] Univ Girona, Dept Fis, Campus Montilivi, Girona 17071, Spain

[3] Charles Univ Prague, Dept Inorgan Chem, Fac Sci, Hlavova 8, Prague 12843 2, Czech Republic

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2018年 / 217卷

关键词：

FeSe alloys; Nanocrystalline materials; Mechanical alloying; X-ray diffraction; Differential scanning calorimetry; Mossbauer spectroscopy; FERRIMAGNETIC FE7SE8; FESE SUPERCONDUCTORS; SINTERING PROCESS; MOSSBAUER; NANOPARTICLES;

D O I：

10.1016/j.matchemphys.2018.07.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fe(75)Se(25)nanostructured powders have been produced by mechanical alloying in a high energy planetary ball-mill (P7) under argon atmosphere. Crystalline structure evolution, morphology changes, thermal measurements and hyperfine parameters variation were followed by scanning electron microscopy (SEM) coupled with energy dispersive spectrometry (EDS) microanalysis, X-ray diffraction (XRD), differential scanning calorimetry (DSC) and transmission Mossbauer spectroscopy (TMS) at 10 K and 293 K. SEM micrographs show progressive refinement of the particle sizes with milling time. XRD and TMS reveal the formation of Fe7Se s phase and alpha-Fe (nanometric scale after 1 h of milling). beta-FeSe hexagonal, Fe3O4 and FeO were also observed after 33 h of milling. Small amount of iron oxides is confirmed by DSC results showing an endothermic peak located at 584 degrees C.

引用

页码：477 / 485

页数：9

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