Alloys created between immiscible elements

Ma, Evan

doi:10.1016/j.pmatsci.2004.07.001

Cited by 348 publications

(161 citation statements)

References 152 publications

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“…1 appear symmetric with respect to composition, short-range Ag and Mo isostructural clustering in the bcc structure could lower the driving force for global phase separation in Mo-rich alloys more than in Ag-rich alloys with fcc structure. This type of clustering is commonly observed in metastable alloys synthesized far from equilibrium 49 , see e.g., the study by Tai et al 50 who reported that the high quenching rates during synthesis of Ag-Mo alloys by ion irradiation lead to the formation of Ag-rich and Mo-rich phases that exhibit compositional modulation (i.e., clustering) at length scales of about 100 nm. A similar mechanism, due to the high quenching rates encountered upon the condensation of vapor species on the growing film surface, may also be operative in our case providing a pathway for the formation of bcc Mo-rich solid solutions.…”

Section: Film Characterizationmentioning

confidence: 73%

Theoretical and experimental study of metastable solid solutions and phase stability within the immiscible Ag-Mo binary system

Sarakinos

Greczyński

Elofsson

et al. 2016

Journal of Applied Physics

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Section: Film Characterizationmentioning

confidence: 73%

Theoretical and experimental study of metastable solid solutions and phase stability within the immiscible Ag-Mo binary system

Sarakinos

Greczyński

Elofsson

et al. 2016

Journal of Applied Physics

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“…A long-standing interest exists in metastable solid solutions due to their potential to achieve outstanding mechanical and physical properties [1][2][3]. In recent times new methods have been developed and improved to obtain supersaturated solid solutions.…”

Section: Introductionmentioning

confidence: 99%

Phase separation of a supersaturated nanocrystalline Cu–Co alloy and its influence on thermal stability

et al. 2015

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The thermal decomposition behavior, the microstructural evolution and its influence on the mechanical properties of a supersaturated Cu-Co solid solution with ~100 nm average grain size prepared by severe plastic deformation is investigated under non-isothermal and isothermal annealing conditions. Pure fine-grained Cu and Co exhibit substantial grain growth upon annealing, whereas the Cu-Co alloy is thermally stable at the same annealing temperatures. The annealed microstructures are studied by independent characterization methods, including scanning electron microscopy, electron energy loss spectroscopy and atom probe tomography. The phase separation process in the Cu-Co alloy proceeds by the same mechanism, but on different length scales: a fine scaled spinodal-type decomposition is observed in the grain interior, simultaneously Co and Cu regions with a larger scale are formed near the grain boundary regions. Subsequent grain growth at higher annealing temperatures results in a microstructure consisting of the pure equilibrium phases. Such mechanisms can be used to tailor nano structures to optimize certain properties. Published in

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“…However, some degree of energy minimization results in the development of local structures on extremely fine scales. 4 Formation and stabilization of amorphous phases in immiscible systems have also been reported, 5,6 along with a strong clustering tendency leading to non-uniform spinodal-like structures. 5 Vapor deposition and other far-from-equilibrium processing techniques may be employed to extend solid solubility in immiscible systems.…”

Section: Introductionmentioning

confidence: 95%

Metallic Glass Nano-composite Thin Films for High-performance Functional Applications

Das

Arora

Mukherjee

2017

JOM

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Metallic glass nanocomposite thin films were synthesized for an immiscible Ag-Cu alloy system by magnetron sputtering. The structure of the films was unique, consisting of homogeneously dispersed nanocrystallites in an amorphous matrix. The size and volume fraction of the nanocrystallites increased with increasing film thickness resulting in increased elastic modulus and hardness. The high electrical conductivity of the nanocomposite films was examined by a valence-band study, which showed that exchange interaction between Ag and Cu in the nanocomposite structure resulted in enhanced charge carrier concentration. The inverse correlation between electrical conductivity and film thickness was explained by surface and interface scattering of electrons with increasing volume fraction of nanocrystallites. The small temperature dependence of conductivity was attributed to the distorted Fermi surface of the nanocomposite films resulting in a greater contribution from structure scattering, which is temperature-independent.

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Alloys created between immiscible elements

Cited by 348 publications

References 152 publications

Theoretical and experimental study of metastable solid solutions and phase stability within the immiscible Ag-Mo binary system

Theoretical and experimental study of metastable solid solutions and phase stability within the immiscible Ag-Mo binary system

Phase separation of a supersaturated nanocrystalline Cu–Co alloy and its influence on thermal stability

Metallic Glass Nano-composite Thin Films for High-performance Functional Applications

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