Mechanically driven alloying of immiscible elements

Yavari, A.R.; Desré, P.; Benameur, Tarek

doi:10.1103/physrevlett.68.2235

Cited by 489 publications

(237 citation statements)

References 15 publications

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“…Fig. 4 summarizes the composition dependence of lattice constants for the Fe-Cu alloys obtained by different synthesis methods [14][15][16][17][18][19][20][21][22][23][24][25]. The values obtained in our experiments agree with the data Fig.…”

Section: Resultssupporting

confidence: 82%

“…The intensive, short-distance diffusion between the neighboring nanoparticles of Cu and Fe occurring during IPD synthesis led us to suppose that this mixing was a result of collisions between the product material and energetic cluster particles delivered to the surface layer as a substance of each individual plasmoid [2,3,8,31]. The mechanism of mixing in the case of the IPD could be explained according to the concept proposed by Yavari et al [24] based on the assumption that ultra small (up to 2 nm) metallic grains could be easily dissolved in the matrix which leads to formation of supersaturated systems. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…4. Lattice parameters of bcc and fcc phases as a function of copper concentration [14][15][16][17][18][19][20][21][22][23][24][25]. The arrow in the case of mechanical alloying shows changes of lattice parameters caused by the milling time.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, equilibrium in the solid state is characterized by a twophase structure. The immiscible Fe-Cu alloys have been an object of interest of many research groups, and they are well-known and widely studied in the literature [12][13][14][15][16][17][18][19][20][21][22][23][24][25][31][32][33][34]. Therefore, in this work the Fe-Cu system is regarded as a good model to study the formation of non-equilibrium phases.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, in this work the Fe-Cu system is regarded as a good model to study the formation of non-equilibrium phases. Expanded research about the structure of this kind of alloys, prepared by different techniques, is carried out because of the possibility to achieve a variety of new properties, thus, the applications [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. Supersaturated solid solutions are precursors of structures consisting of ferromagnetic/nonmagnetic areas that are required for giant magnetoresistance (GMR).…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of multicomponent metallic layers during impulse plasma deposition

Nowakowska-Langier

Choduń

Zdunek

2015

Materials Science-Poland

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Pulsed plasma in the impulse plasma deposition (IPD) synthesis is generated in a coaxial accelerator by strong periodic electrical pulses, and it is distributed in a form of energetic plasma packets. A nearly complete ionization of gas, in these conditions of plasma generation, favors the nucleation of new phase of ions and synthesis of metastable materials in a form of coatings which are characterized by amorphous and/or nanocrystalline structure. In this work, the Fe-Cu alloy, which is immiscible in the state of equilibrium, was selected as a model system to study the possibility of formation of a non-equilibrium phase during the IPD synthesis. Structural characterization of the layers was done by means of X-ray diffraction and conversionelectron Mössbauer spectroscopy. It was found that supersaturated solid solutions were created as a result of mixing and/or alloying effects between the layer components delivered to the substrate independently and separately in time. Therefore, the solubility in the Fe-Cu system was largely extended in relation to the equilibrium conditions, as described by the equilibrium phase diagram in the solid state.

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Section: Resultssupporting

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of multicomponent metallic layers during impulse plasma deposition

Nowakowska-Langier

Choduń

Zdunek

2015

Materials Science-Poland

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Microstructure investigations of ball milled materials

Huang

1998

Microsc. Res. Tech.

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HREM and FEG TEM were emphasized and extensively used to follow the most subtle changes in the structure and composition of ball‐milled Cu, Fe‐Cu, and thermally decomposed Fe60Cu40. Some significant results are obtained and summarized as follows: HREM shows that the deformation of ball‐milled copper proceeds mainly by twinning and shear bands (SBs) formation. The nano‐grains formed during ball milling (BM) contain a high density of dislocations. The grain boundaries (GBs) of nanocrystalline (NC) Cu prepared by BM are ordered, curved, and strained, but disordering, lattice distortion, and nanovoids in local regions were frequently observed. Nanoscale composition analysis on mechanically alloyed Fe16Cu84 shows that the average Fe content in both the interior of grains and the GBs is close to the designed composition, which proves that a supersaturated solid solution has really formed. However, the Fe content is rather inhomogeneous between the larger and smaller grains, which infers the inhomogeneous mixing of Fe and Cu during mechanical alloying (MA). NC structure and the mechanical force‐enhanced fast diffusion are the reasons of the formation of supersaturated solid solutions in immiscible systems with positive enthalpy of mixing. HREM observations carried out with the thermally decomposed Fe60Cu40 solid solution show that the Nishiyama (N‐W) or Kurdyumov‐Sachs (K‐S) orientation relationships exist between α‐Fe and Cu. Energy dispersive X‐ray spectra (EDXS) results show that the Cu content in these α‐Fe grains reaches as high as 9.5 at.% even after heating to 1,400°C, which is even higher than the maximum solubility of Cu in γ‐Fe at 1,094°C. Microsc. Res. Tech. 40:101–121, 1998. © 1998 Wiley‐Liss, Inc.

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Metastable Metallic Alloys

Mănăilă¹

1999

phys. stat. sol. (a)

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Mechanically driven alloying of immiscible elements

Cited by 489 publications

References 15 publications

Synthesis of multicomponent metallic layers during impulse plasma deposition

Synthesis of multicomponent metallic layers during impulse plasma deposition

Microstructure investigations of ball milled materials

Metastable Metallic Alloys

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