Interdiffusion in Cu&amp;ndash;Mn Alloys

Iijima, Yoshiaki; Hirano, Ken‐ichi; Sato, Kazuo

doi:10.2320/matertrans1960.18.835

Cited by 11 publications

(3 citation statements)

References 11 publications

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“…262257 s are presented and Kirkendall plane shift of the Cu/Cu-32.6 at.% Mn, Cu/Cu-49.5 at.% Mn, and Cu/Cu-69.6 at.% Mn diffusion couples annealed at 1118 K for different times are shown in Figure 11(b). The calculated results at low Mn content are in good agreement with the experimental result [134]. The apparent divergence shown at high Mn content, 69.6 at.% Mn is due to the fact that Mn is an easy evaporated element.…”

Section: Figuresupporting

confidence: 85%

Atomic mobilities and diffusivities in Al alloys

Zhang

Cui

et al. 2011

Sci. China Technol. Sci.

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Knowledge of diffusivity is a prerequisite for understanding many scientific and technological disciplines. In this paper, firstly major experimental methods, which are employed to provide various diffusivity data, are briefly described. Secondly, the fundamentals of various computational methods, including first-principles method, embedded atomic method/molecular dynamic simulation, semi-empirical approaches, and phenomenological DICTRA technique, are demonstrated. Diffusion models recently developed for order/disorder transitions and stoichiometric compounds are also briefly depicted. Thirdly, a newly established diffusivity database for liquid, fcc_A1, L1 2 , bcc_A2, bcc_B2, and intermetallic phases in the multicomponent Al alloys is presented via a few case studies in binary, ternary and quaternary systems. And the integration of various computational techniques and experimental methods is highlighted. The reliability of this diffusivity database is validated by comparing the calculated and measured concentration profiles, diffusion paths, and Kirkendall shifts in various binary, ternary and quaternary diffusion couples. Next, the established diffusivity databases along with thermodynamic and other thermo-physical properties are utilized to simulate the microstructural evolution for Al alloys during solidification, interdiffusion and precipitation. A special discussion is presented on the phase-field simulation of interdiffusion microstructures in a series of Ni-Al diffusion couples composed of γ, γ', and β phases under the effects of both coherent strain and external compressive force. Future orientations in the establishment of next generation of diffusivity database are finally addressed.

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Section: Figuresupporting

confidence: 85%

Atomic mobilities and diffusivities in Al alloys

Zhang

Cui

et al. 2011

Sci. China Technol. Sci.

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“…Manganese was recently shown to be a strongly segregating alloy addition (14) to copper and enriched on the alloy surface and at grain boundaries during annealing. This grain boundary segregation combined with the relatively slow diffusion rate of Mn in Cu (15) promoted the formation of depleted zones adjacent to annealed grain boundaries. During dealloying of an annealed Cu-50%Mn alloy intergranular corrosion occurred.…”

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The Effect of Arsenic on the Dealloying of α‐Brass

Pryor

Giam

1982

J. Electrochem. Soc.

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Potentiostatic studies in 0.5M sodium chloride solution show that an arsenic addition to the alloy is only effective in preventing dealloying of α‐brass at potentials more noble than 0.0V on the hydrogen scale. This potential coincides with that potential at which arsenic in the alloy can be oxidized to soluble arsenite ions in solution. A mechanism by which arsenite or arsenate ions in solution inhibit dealloying is proposed.

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“…The XPS analysis verifies the presence of Cu(I) and Cu(II) and also reveals that the valence state of Fe is a mixture of Fe 2+ /Fe 3+ and the valence state of Mn is dominated by a mixture of Mn(II), Mn(III), and Mn(IV) (Figure S12). The presence of the mixed oxides in the hollow structures could be the result of interdiffusion between Cu and Fe/Mn during the metal-on-metal growth to the corresponding core–shell structures. , It is implied that interdiffusion also plays a role in lowering the interfacial energy for the conformal deposition to the core–shell structures at the nanoscale. Additionally, one explanation for the CuMnO x hollow structures having higher Cu content than the CuFeO x hollow structures is that the bond dissociation energy of Mn–Mn (61 kJ mol –1 ) is lower than that of Fe–Fe (108 kJ mol –1 ), facilitating the interdiffusion during the Cu–MnO x core–shell formation.…”

Section: Resultsmentioning

confidence: 99%

A Metal-on-Metal Growth Approach to Metal–Metal Oxide Core–Shell Nanostructures with Plasmonic Properties

Crane

Manso

et al. 2020

J. Phys. Chem. C

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Hybrid core–shell nanoparticles integrate the material properties from individual components; however, the synthesis of core–shell nanoparticles with dissimilar materials remains challenging. In this work, we applied a metal-on-metal thin film growth approach to control the conformal deposition of non-precious metal shells on the Cu-based metal cores to form core–shell structures of metal–metal oxide hybrids (M–M′O x , where M = AuCu3 or Cu, M′ = Fe, Mn, and Ni). The deposition kinetics were controlled by a temperature-regulated thermal decomposition of zerovalent transition metal complexes. It is predicted that the conformal deposition can be promoted by keeping the initial deposition temperature close to the thermal decomposition temperature of the zerovalent precursors. The mechanisms of strain reduction and interdiffusion facilitate conformal deposition over island growth in the synthesis with slow reaction kinetics. This study provides insightful guidance to metal-on-metal growth in solution at the nanoscale and thus the seed-mediated approach to hybrid core–shell structures. The optical properties of these metal–metal oxide hybrids were investigated experimentally and interpreted by theoretical simulations. Despite damping effects, the plasmonic properties of these Cu-based core-metal oxide shell structures may have the potential to enable plasmon-enhanced applications.

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Interdiffusion in Cu–Mn Alloys

Cited by 11 publications

References 11 publications

Atomic mobilities and diffusivities in Al alloys

Atomic mobilities and diffusivities in Al alloys

The Effect of Arsenic on the Dealloying of α‐Brass

A Metal-on-Metal Growth Approach to Metal–Metal Oxide Core–Shell Nanostructures with Plasmonic Properties

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