S Zghal Ball Milling Cu Ag
Electron microscopy nanoscale characterization of ball-milled Cu-Ag …
We present a study of nanostructured Cu-Ag material obtained by low temperature ball milling. The microstructural characterization is carried out using a wide variety of transmission electron microscopy (TEM) techniques from conventional dark-field imaging, selected area diffraction and energy dispersive X-ray spectrometry (EDS) to more modern techniques of scanning TEM …
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Structural and Chemical Characterization of Cu-Ag and Ni-Ag
Semantic Scholar extracted view of "Structural and Chemical Characterization of Cu-Ag and Ni-Ag Nanocomposites Synthesized by High-Energy Ball Milling" by S. Zghal et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 220,714,380 papers from all fields of science ...
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High-strength and high-conductive Cu/Ag multilayer produced …
By combining the two most conductive metals, Ag and Cu, a composite with extremely high electrical conductivity and high strength was produced be accumulative roll bonding method for the first time. UFG microstructures were observed in the Cu–Ag samples after five ARB cycles. The continuity of the constituent Cu and Ag layers was maintained up to …
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Structural and Chemical Characterization of Cu-Ag and …
Structural and Chemical Characterization of Cu-Ag and NiAg Nanocomposites Synthesized by High-Energy Ball Milling Slim Zghal 2002, Journal of Metastable and Nanocrystalline Materials
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Alloying of immiscible phases in wire-drawn Cu–Ag …
By combining forced mixing and decomposition in ball-milled Cu 50 Ag 50 powders, Zghal et al. [14] reported the formation of Cu/Ag nanocomposite with a very high hardness. ... TEM specimens were prepared by ion milling the wires supported on a Mo ring, which were observed by a Philips CM200 TEM. Needle like specimens for 3DAP analysis were ...
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Structural and Chemical Nanoscale Electron Microscopy …
Second, when ball milling is performed at elevated temperatures, Ag-Cu nanocomposites are synthesized at steady-state [3]. Nanocomposites can also be obtained by annealing at elevated temperature chemically mixed and cold-worked powders obtained by room temperature milling.
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Enhanced Metastable Solubility by Ball Milling of Rapidly Solidified Cu
The Cu-Co-Mn system's free energy of solid solubility varies for grain sizes of (b) 20 nm, (c) 10 nm and (d) 4 nm, as shown in Figure 1parison of the results of Mn addition in ternary Cu-Co-Mn system vis-a-vis binary Cu-Co system (Figure 1a) obtained by thermodynamic calculation reveals that the addition of Mn has significantly reduced the free energy over the …
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Forced mixing and nanoscale decomposition in ball-milled Cu–Ag …
Ball milling of Cu and Ag powders was performed following the procedure described in detail by Klassen et al. [14]. ... D. Seidman, U. Herr, and Drs. D. Isheim, T. Klassen, S. Zghal are gratefully acknowledged. This research was supported by the National Science Foundation, Grant No. DMR-9733582 and by the Office of Naval Research, Grant N00014 ...
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Structure and phase separation of Ag–Cu alloy thin films
S. Zghal et al. Electron microscopy nanoscale characterization of ball milled Cu–Ag powders. ... Ball milling of systems with positive heat of mixing: effect of temperature in Ag–Cu ... NP-Ag 4 Cu also presents better stability after 5000 cycles and 20000 s than Pt/C. The NP-Ag 4 Cu was also used as cathode for Zn-air battery and ...
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Electron microscopy nanoscale characterization …
Electron microscopy nanoscale characterization of ball-milled Cu–Ag powders. Part I: Solid solution synthesized by cryo-milling
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Deformation mechanisms during severe plastic deformation of a Cu Ag
Another interesting aspect of immiscible material systems like Cu Ag is the formation of supersaturated solid solutions and amorphization during severe plastic deformation. Early studies on the ball milling of Cu Ag system have shown that supersaturated solid solutions can be obtained over the whole composition range [18]. Although, several hypothesis were …
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Pascal Bellon | Materials Research Laboratory | Illinois
My research program is mainly focused on alloys or mixtures submitted to a sustained external forcing: such conditions are often met during either the processing of materials (e.g. by ball-milling or during thin film growth) or during the use of these materials (e.g. during frictional wear or under irradiation).
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(PDF) Solubility Study in Ag-Cu Binary System Prepared By Ball Milling …
Int. J. Nanosci. Nanotechnol., Vol. 8, No. 2, June 2012, pp. 105-110 Solubility Study in Ag-Cu Binary System Prepared By Ball Milling Process S. M. M. Shafiei*, E. Salahi, S. A. Tayebi Fard Materials and Energy Research Center (MERC) (*) Corresponding author: smm_shafiee@yahoo (Received:18 Mar. 2012 and Accepted: 23 June 2012) Abstract: …
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Nanocomposites stabilized by elevated-temperature ball milling …
Ag 50 Cu 50 alloys were prepared by high-energy ball milling at 393, 423, and 453 K. Atom probe tomography was used to characterize the microstructure and the local composition of the milled powders. The dynamical competition between the atomic mixing forced by milling and the phase separation promoted by thermodynamic driving forces results in the self …
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Electron microscopy nanoscale characterization of ball-milled Cu–Ag
We present a study of nanostructured Cu–Ag material obtained by low temperature ball milling. The microstructural characterization is carried out using a wide variety of transmission electron ...
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Electron microscopy nanoscale characterization of ball milled …
DOI: 10.1016/S1359-6454(02)00286-0 Corpus ID: 137316406; Electron microscopy nanoscale characterization of ball milled Cu-Ag powders. Part II: Nanocomposites …
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Sliding wear-induced chemical nanolayering in Cu–Ag, and …
Commercially pure copper and silver powders were combined to obtain an average molar composition of 90% Cu and 10% Ag and then subjected to high-energy ball milling using a SPEX 8000 mill in an argon glove box for 12 h at ambient temperature (∼50 °C).Ball milling forces the mixing of Cu and Ag into a solid solution [23].
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Structural and Chemical Characterization of Cu-Ag and NiAg
Structural and Chemical Characterization of Cu-Ag and NiAg Nanocomposites Synthesized by High-Energy Ball Milling ... multiwalled carbon nanotubes (MWCNT), fullerenes C60, (ii) …
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Weak CO binding sites induced by Cu–Ag interfaces …
This is also supported by the measured K D of 0.054 ± 0.002 s −1 for the 4-h-milled Cu(OD) 0.8 Ag 0.2 (Supplementary Fig. 20), indicating its weak CO adsorption sites are more than those of Cu ...
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Electron microscopy nanoscale characterization of ball …
We present a study of nanostructured Cu-Ag material obtained by low temperature ball milling. The microstructural characterization is carried out using a wide variety of transmission electron …
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Effect of surface modification of Cu with Ag by ball-milling …
To investigate the sample's corrosion properties, electrochemical methods were performed. The behavior of coating in aqueous 3.5 wt% NaCl under potentiodynamic polarization conditions is shown in Fig. 3.The values of the E corr, I corr, β a, β c and R p obtained from these Tafel polarization curves are given in Table 3.It is observed that (ball-milled Ag–Cu)/PU …
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Structural and Chemical Nanoscale Electron Microscopy …
Second, when ball milling is performed at elevated temperatures, Ag-Cu nanocomposites are synthesized at steady-state [3]. Nanocomposites can also be obtained by annealing at …
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Electron microscopy nanoscale characterization of ball milled Cu-Ag …
Microstructures and phases stabilized at steady state by variable temperature ball milling of Cu 50 Ag 50 powders are characterized using transmission and scanning transmission electron microscopy. Starting from chemically mixed and cold-worked powders obtained by room temperature milling, it is shown that, upon increasing the milling temperature, the material …
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Electron microscopy nanoscale characterization of ball …
The Cu–Ag alloy system has been selected for this study for several reasons. Firstly, both Ag and Cu have low stacking fault energies, 16 and 45 mJ/m 2, respectively [18]. …
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Electron microscopy nanoscale characterization of ball-milled Cu–Ag
We present a study of nanostructured Cu–Ag material obtained by low temperature ball milling. The microstructural characterization is carried out using a wide variety of transmission electron microscopy (TEM) techniques from conventional dark-field imaging, selected area diffraction and energy dispersive X-ray spectrometry (EDS) to more modern …
WhatsApp: +86 18221755073
Electron microscopy nanoscale characterization of ball-milled Cu–Ag …
Semantic Scholar extracted view of "Electron microscopy nanoscale characterization of ball-milled Cu–Ag powders. Part I: Solid solution synthesized by cryo-milling" by S. Zghal et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 220,291,910 papers from all fields of science ...
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Electron microscopy nanoscale characterization of ball …
Microstructures and phases stabilized at steady state by variable temperature ball milling of Cu50Ag50 powders are ... 4712 S. Zghal et al. / Acta Materialia 50 (2002) 4711–4726
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Nanocomposites stabilized by elevated-temperature ball milling …
In Section 2, the experimental procedures employed to ball mill the powders and prepare APT specimens are described. APT results are presented in Section 3, and discussed in Section 4. 2. Experimental Ball milling of Cu and Ag powders was performed following the procedure described in detail by Klassen et al. [6].
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Sliding wear-induced chemical nanolayering in Cu–Ag, …
Commercially pure copper and silver powders were combined to obtain an average molar composition of 90% Cu and 10% Ag and then subjected to high-energy ball milling using a SPEX 8000 mill in an argon glove box for 12 h at ambient temperature (∼50 °C).Ball milling forces the mixing of Cu and Ag into a solid solution [23].The ball-milled powders were then …
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Electron microscopy nanoscale characterization of …
Acta Materialia 50 (2002) 4695–4709 Electron microscopy nanoscale characterization of ballmilled Cu–Ag powders. Part I: Solid solution synthesized by cryo-milling S. Zghal a,b, M.J. Hÿtch c, J.-P. …
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