Phase Separation in Rapid Solidified Ag-rich Ag-Cu-Zr Alloys

Niyomsoan, S.; Gargarella, Piter; Chomsaeng, Natthaphol; Termsuksawad, Preecha; Kühn, U.; Eckert, J.

doi:10.1590/1516-1439.317614

Cited by 9 publications

(3 citation statements)

References 14 publications

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“…The gradient of the cooling rate across the ribbon during melt-spinning causes a variation in the surface morphology and microstructure between the free side and wheel side of the as-spun ribbon. 30 Field-emission scanning electron microscopy (FESEM) images of both sides of the ribbon, as well as its cross-section, for the as-spun and dealloyed states, are displayed in Figure 3. Compared with the rather dense appearance of the as-spun ribbon (Figure 3a), a fully porous morphology is observed after selective etching (Figure 3b).…”

Section: Resultsmentioning

confidence: 99%

Nanoporous Fe-Based Alloy Prepared by Selective Dissolution: An Effective Fenton Catalyst for Water Remediation

et al. 2017

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A fully nanoporous Fe-rich alloy, prepared by selective dissolution of melt-spun Fe 43.5 Cu 56.5 ribbons, exhibits outstanding properties as a heterogeneous Fenton catalyst toward the degradation of methyl orange (MO) in aqueous solution. In addition, the ferromagnetic characteristics of this material enable its wireless manipulation toward specific locations within polluted wastewater. The influence of selective dissolution on the microstructure, sample morphology (surface and cross-section), elemental composition, and magnetic properties of the resulting nanoporous alloy is investigated. The dealloying procedure enhances the saturation magnetization and drastically increases the catalytic performance (i.e., the time required for full degradation of MO from the medium is reduced by a factor of approximately 2 by subjecting the Fe 43.5 Cu 56.5 ribbons to prior dealloying). Remarkably, the effectiveness of this nanoporous material surpasses the results obtained by the homogeneous Fenton reaction using an equivalent concentration of Fe cations leached into the media from the nanoporous alloy. The different factors that promote the high catalytic activity are discussed. The outstanding catalytic activity, together with the simplicity of the synthetic procedure, makes this material very appealing for water remediation using advanced Fenton processes.

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Section: Resultsmentioning

confidence: 99%

Nanoporous Fe-Based Alloy Prepared by Selective Dissolution: An Effective Fenton Catalyst for Water Remediation

et al. 2017

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“…Ag-Cu system is an interesting combination having the same crystal structure (facecentered cubic) and positive enthalpy of mixing (10.8 KJ•mol −1 [23]). During solidification, to attain equilibrium Cu and Ag atoms tend to segregate and forms Cu-rich and Ag-rich matrix [25]. As there are no thermodynamic investigations available for a quaternary Ag-Cu-Sn-Zr alloy, the present work characterizes the intermetallic phases based on the ternary systems of Ag-Cu-Zr [26][27][28] and Cu-Sn-Zr [24,29].…”

Section: Microstructure Of Ag-18cu-6sn-3zr and Ag-18cu-6sn-3zr-1ti Br...mentioning

confidence: 99%

Active Brazing of Alumina and Copper with Multicomponent Ag-Cu-Sn-Zr-Ti Filler

Rajendran

Hwang

Jung

2021

Metals

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The study was designed to investigate the synergic effect of Ti and Sn in the active metal brazing of Al2O3 ceramic to copper brazed, using the multicomponent Ag-Cu-Zr filler alloy. Numerous fine and hexagonal-shaped rod-like ternary intermetallic (Zr, Ti)5Sn3 phase (L/D = 5.1 ± 0.8, measured in microns) were found dispersed in the Ag-Cu matrix of Ag-18Cu-6Sn-3Zr-1Ti alloy, along with the ternary CuZrSn intermetallic phases. An approximate 15° reduction in contact angle and 3.1 °C reduction in melting point are observed upon the incorporation of Ti and Sn in Ag-18Cu-3Zr filler. Interestingly, the interface microstructure of Al2O3/Cu joints brazed by using Ag-18Cu-6Sn-3Zr-1Ti filler shows a double reaction layer: a discontinuous Ti-rich layer consisting of (Cu, Al)3(Ti, Zr)3O, TiO, and in-situ Cu-(Ti, Zr) precipitates on the Al2O3 side and continuous Zr-rich layer consisting of ZrO2 on the filler side. The shear strength achieved in Al2O3/Cu joints brazed with Ag-18Cu-6Sn-3Zr-1Ti filler is 31% higher, compared to the joints brazed with Ag-18Cu-6Sn-3Zr filler. Failure analysis reveals a composite fracture mode indicating a strong interface bonding in Al2O3/Ag-18Cu-6Sn-3Zr-1Ti filler/Cu joints. The findings will be helpful towards the development of high entropy brazing fillers in the future.

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“…The formation of nanocrystalline materials prepared from rapidly quenched amorphous alloys via thermal treatment strongly depends on the structure of the original amorphous state and the local atomic ordering. For the alloy ribbon prepared by single roll rapid quenching method, the cooling rate decreased as going from the wheel surface to the free surface of the ribbon [14]. The gradient of the cooling rate across the thickness of the ribbon during melt-spinning causes a variation in the surface morphology and microstructure between the free side and wheel side of the as-spun ribbon [15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ta Addition on Glass-Forming Ability and Structures of Fe₄₀Co₄₀Zr₇V₂B₁₁ Alloy

Sun,

Zhang

2023

Acta Phys. Pol. A

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Fe40Co40Zr7V2B11−xTax (x = 0, 1, 2) alloy ribbons are prepared through single-roller melt spinning followed by annealing in a temperature range of 300-700 • C. The influence of substituting Ta for V on the free and wheel surface structures of the samples is investigated. The addition of Ta improves the glassformation ability owing to the large atomic radius of Ta atoms. The as-quenched Fe40Co40Zr7V2B11 alloy is not amorphous, and α-Fe crystals are textured (200) on the free surface. Moreover, the as-quenched Fe40Co40Zr7V2B10Ta1 alloy is not completely amorphous, and a small amount of α-Fe crystals remains textured (200) on the free surface. The crystallization of the free surfaces of the Fe40Co40Zr7V2B11 and Fe40Co40Zr7V2B10Ta1 alloys differs from those of the wheel-contacted surfaces. Both the free and wheel-contacted surfaces of the as-quenched Fe40Co40Zr7V2B9Ta2 alloy exhibit fully amorphous structures. The crystallization of the free surface of the Fe40Co40Zr7V2B9Ta2 alloy is similar to that of the wheel-contacted surface. The ductility of the Fe40Co40Zr7V2B9Ta2 alloy is greater than that of the Fe40Co40Zr7V2B11 and Fe40Co40Zr7V2B10Ta1 alloys. The addition of Ta significantly improves the glass-forming ability and ductility of the alloy.

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Phase Separation in Rapid Solidified Ag-rich Ag-Cu-Zr Alloys

Cited by 9 publications

References 14 publications

Nanoporous Fe-Based Alloy Prepared by Selective Dissolution: An Effective Fenton Catalyst for Water Remediation

Nanoporous Fe-Based Alloy Prepared by Selective Dissolution: An Effective Fenton Catalyst for Water Remediation

Active Brazing of Alumina and Copper with Multicomponent Ag-Cu-Sn-Zr-Ti Filler

Effect of Ta Addition on Glass-Forming Ability and Structures of Fe₄₀Co₄₀Zr₇V₂B₁₁ Alloy

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Phase Separation in Rapid Solidified Ag-rich Ag-Cu-Zr Alloys

Cited by 9 publications

References 14 publications

Nanoporous Fe-Based Alloy Prepared by Selective Dissolution: An Effective Fenton Catalyst for Water Remediation

Nanoporous Fe-Based Alloy Prepared by Selective Dissolution: An Effective Fenton Catalyst for Water Remediation

Active Brazing of Alumina and Copper with Multicomponent Ag-Cu-Sn-Zr-Ti Filler

Effect of Ta Addition on Glass-Forming Ability and Structures of Fe40Co40Zr7V2B11 Alloy

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Effect of Ta Addition on Glass-Forming Ability and Structures of Fe₄₀Co₄₀Zr₇V₂B₁₁ Alloy