Effect of synthesis method on the microstructure of a nanophase Ag - Cu alloy

Li, Z Q; Shen, Hui; Chen, L; Li, Y; Güther, B; Корзников, А. В.; Valiev, Ruslan Z.

doi:10.1088/0022-3727/29/5/038

Cited by 7 publications

(3 citation statements)

References 19 publications

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“…The eutectic alloy Ag-28Cu with lower fusing point of 779.1°C was first produced by rapid quenching in 1960 [2]. Since then, many methods have been applied to prepare supersaturated Ag-Cu solid solutions [3][4][5][6][7]. At present, the microstructure, mechanical properties and thermodynamic properties of metastable Ag-Cu alloys are continuously studied [8][9][10], but the study on nanocrystilline Ag-Cu supersaturated solid solution is still promising due to its outstanding properties relative to conventional solid solution.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nanocrystalline Ag-Cu Supersaturated Solid Solution by Mechanical Alloying

Qiu

Yang

et al. 2010

AMR

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Nanocrystalline Ag-28Cu supersaturated solid solution is prepared by mechanical alloying (MA) using a planetary ball mill. The mechanical alloyed powders are characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM) and differential scanning calorimeter (DSC). XRD patterns show that the main peak of Ag-28Cu supersaturated solid solution exists at about 2θ=39° when the milling time is 30h. HRTEM images show that the grain sizes of as-prepared solid solutions have distributions from 10nm to 15nm. The interplanar spacing of (111) plane for fcc Ag-28Cu supersaturated solid solution is about 2.24Å. DSC measurement result indicates that the melting temperature of Ag-28Cu supersaturated solid solution is 783.8°C. The Ag(Cu) supersaturated solid solutions are in metastable state and they will be transformed into Ag-rich phase and Cu-rich phase simultaneously by annealing at 215°C- 415°C.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Nanocrystalline Ag-Cu Supersaturated Solid Solution by Mechanical Alloying

Qiu

Yang

et al. 2010

AMR

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“…However, by quenching methods, it is possible to obtain a supersaturated solid solution of silver-copper with various silver/copper ratios [5], in the form of a disordered fcc alloy (c phase) or an amorphous alloy [6]. Electrodeposition can also lead to supersaturated alloys.…”

Section: Introductionmentioning

confidence: 99%

Silver–copper electrodeposition from ammonium hydroxide solution: influence of EDTA and HEDTA

Oliveira

Carlos

2009

J Appl Electrochem

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The influence of EDTA (ethylenediaminetetraacetic acid, disodium salt) or HEDTA (N-(2-hydroxyethyl) ethylenediaminetriacetic acid, trisodium salt) on silver-copper electrodeposition from ammonium hydroxide solution was investigated. Voltammetric studies showed that silver was deposited at potentials more negative than ?0.100 V, while the copper(II) ion was reduced to copper(I) ion and metallic copper at potentials more negative than ?0.100 and -0.375 V, respectively. Chronoamperometry, scanning electron microscopy and energy-dispersive X-ray spectroscopy (EDS) indicated that, for deposits obtained at -0.450 V, increasing either the silver content in the silvercopper deposit or the charge density of deposition led to dendritic growth. Moreover, dendritic growth decreased when either the EDTA or HEDTA concentration increased. EDS analysis of the deposits obtained at -0.200 V showed codeposition of copper with silver, which was attributed to Cu(I) ion disproportionation to Cu(0) and Cu(II). Moreover, the silver-copper deposits obtained at -0.200 V, from a solution containing EDTA or HEDTA, were nondendritic in spite of the high silver content. The presence of EDTA and HEDTA improved the silver-copper morphology. X-ray diffraction analysis indicated that the silvercopper electrodeposit was a supersaturated solid solution.

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“…Supersaturated Ag-Cu alloys were first produced by rapid quenching [4]. Then a lot of methods, MA [5], inert gas condensation and/or severe plastic deformation [6], ␥-radiation [7], hydrogen plasma-metal reaction [8], ion beam mixing [9] and so forth, have been used to prepare supersaturated Ag-Cu solid solutions. Failures associated with electromigration and stress migration affect directly the performance and serve life of the interconnects.…”

Section: Introductionmentioning

confidence: 99%