Mechanical alloying of the high carbon FeC system

Tanaka, Takeo; Nasu, Saburo; Ishihara, Keiichi N.; Shingu, Paul Hideo

doi:10.1016/0022-5088(91)90147-v

Cited by 77 publications

(38 citation statements)

References 8 publications

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“…The sextet with a hyperfine field of about 33.0 T with a center shift of near zero indicates the presence of the α-Fe phase, and the lower magnetic hyperfine fields of about 20.0 T is consistent with the presence of the Fe 3 C phase. These values are in good agreement with those reported for α-Fe and Fe 3 C in ball-milled Fe-C materials with both low 23 and high 12 carbon content. The hyperfine field of about 11.5 T cannot be assigned to a specific Fe-C phase.…”

Section: Resultssupporting

confidence: 91%

Electrochemistry of Catalytically Graphitized Ball Milled Carbon in Li Batteries

Zhao

Yao

George

et al. 2016

J. Electrochem. Soc.

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High carbon Fe-C composites with starting concentrations of 10, 20, 30, and 40 wt% Fe (2.3 -12.5 atomic % Fe) were prepared by ball milling followed by annealing. Increasing the Fe concentration and annealing temperature resulted in catalytic graphitization of the carbon. Mössbauer spectroscopy analysis indicated that Fe concentration and annealing temperature had significant effects on the Fe magnetic hyperfine field, quadrupole splitting, and the formation of γ-Fe. When used as electrodes in Li cells, the electrochemistry of ball milled Fe-C powders annealed at low temperatures resembled that of amorphous carbon. Fe-C with 40 wt% Fe annealed at 2000 • C had electrochemical characteristics of a pristine graphite electrode with good cycling performance. These results demonstrate that lithium battery negative electrodes with good cycling performance can be produced from catalytically prepared graphite.

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Section: Resultssupporting

confidence: 91%

Electrochemistry of Catalytically Graphitized Ball Milled Carbon in Li Batteries

Zhao

Yao

George

et al. 2016

J. Electrochem. Soc.

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“…The estimates of the Am(Fe-C) phase amount showed [5][6][7][8] that it formed in the interfaces of the α-Fe nanostructure. The given SSRs types with x ≥ 17 agree with the data published earlier in [12,18,19] but they differ from the results of [17,20] in which alongside with cementite hexagonal carbides were found and from [21,22] in which only cementite as the first MA stage was found to be formed. Controversial results were obtained for a single-stage process of MA as well with x < 17 at.% C: Hexagonal carbides [17], interstitial solid solution of [23] and amorphous Fe-C phase [7,8,11].…”

Section: Mechanical Alloying Of Fe-c and Fe-bsupporting

confidence: 67%

“…It was established [7,8,12,17] that in the C concentration range 0< x ≤ 25 at.% in the initial mixture there was a critical concentration x = 17 at.% at which the change of the type of SSRs in MA took place. In [5,8] we found the following types of SSRs with x ≥ 17 at.% C.…”

Section: Mechanical Alloying Of Fe-c and Fe-bmentioning

confidence: 99%

“…In general, one can ascertain that MA is proceeded by the formation of laminar structure with characteristic sizes of 1-10 µm (see, e.g. [12,13]). However, detailed comparison of the mechanisms and kinetics of MA in E. P. Yelsukov (B) · G. A. Dorofeev Physical-Technical Institute UrB RAS, 426001 Izhevsk, Russia e-mail: yelsukov@fnms.fti.udm.ru the Fe-M systems on the basis of the earlier published data is not possible for the following reasons: a. MA was carried out under different conditions: The material of grinding tools, power intensity of milling devices.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nanostructure and Phases Formation under Mechanical Alloying of Bynary Powder Mixtures of Fe and sp-Element (M); M = C,B,Al,Si,Ge,Sn

Yelsukov¹,

Дорофеев²

2006

Hyperfine Interact

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The processes of mechanical alloying of iron and sp-elements (C, B, Al, Si, Ge, Sn) under identical conditions of mechanical treatment have been studied. General regularities and differences in the mechanisms and kinetics of solid state reactions have been ascertained. A microscopic model of mechanical alloying in these systems is suggested.Key words mechanical alloying · iron and sp-elements · solid state reactions · mechanisms · kinetics.

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“…Fe 3 C and Fe 7 C 3 nanoparticles have been produced by CO 2 laser pyrolysis of a vapor mixture of Fe(CO) 5 and C 2 H 4 [5]. Iron carbides with high carbon contents were synthesized by mechanical alloying of iron and graphite powders; Mössbauer measurements revealed that Fe 3 C and Fe 7 C 3 were produced [6].…”

Section: Introductionmentioning

confidence: 99%

Iron carbide nanoparticles produced by laser ablation in organic solvent

2011

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Laser ablation of iron in an organic solvent (pentane, hexane, or decane) was performed using an air-tight cell to produce iron carbide nanoparticles. Mössbauer spectra of the nanoparticles were obtained at room temperature. They revealed that the nanoparticles consisted of two paramagnetic components and magnetic components. The two paramagnetic components were a high-spin Fe(II) species and an amorphous iron carbide containing a large amount of carbon. Whereas the magnetic components measured at room temperature exhibited superparamagnetism, those measured at low temperature were fitted by a combination of four sextets, which were assigned to Fe 7 C 3 . The Fe 7 C 3 yield was higher in higher molecular weight solvents. Transmission electron microscopy (TEM) images of the samples showed that the nanoparticles were spherical with diameters in the range 10-100 nm.

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Mechanical alloying of the high carbon FeC system

Cited by 77 publications

References 8 publications

Electrochemistry of Catalytically Graphitized Ball Milled Carbon in Li Batteries

Electrochemistry of Catalytically Graphitized Ball Milled Carbon in Li Batteries

Nanostructure and Phases Formation under Mechanical Alloying of Bynary Powder Mixtures of Fe and sp-Element (M); M = C,B,Al,Si,Ge,Sn

Iron carbide nanoparticles produced by laser ablation in organic solvent

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