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Experimental Investigation of Microstructure and Phase Transitions in Ag-Cu-Zn Brazing Alloys

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Abstract

Microstructure and phase transitions of selected brazing alloys from the Ag-Cu-Zn ternary system were investigated. Four ternary alloys with silver content in the compositional range from 25 to 60 wt.% were studied using x-ray diffraction (XRD) and scanning electron microscopy coupled with the energy-dispersive spectroscopy (SEM–EDS). Phase transitions of the investigated alloys were measured using differential scanning calorimetry (DSC). Experimentally obtained results were compared with the results of a thermodynamic calculation of the phase equilibria according to the CALPHAD method. The experiments confirmed the optimized thermodynamic parameters for the calculations from the thermodynamic assessment in literature. Phase compositions, liquidus and solidus temperatures were confirmed by the EDS and DTA methods. Additionally, the calculated solidification paths and predicted phase transformations were in agreement with the SEM images.

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Acknowledgments

This work has been supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia, Projects Nos. TR 34033 and ON 172037. Calculations were performed by Pandat 8.1 software.

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Authors and Affiliations

  1. Innovation Centre of TMF Belgrade, University of Belgrade, Karnegijeva 4, 11120, Belgrade, Serbia

    Stevan P. Dimitrijević

  2. Technical Faculty in Bor, University of Belgrade, Vojske Jugoslavije 12, 19210, Bor, Serbia

    Dragan Manasijević, Milan Gorgievski & Srba Mladenović

  3. TMF Belgrade, University of Belgrade, Karnegijeva 4, 11120, Belgrade, Serbia

    Željko Kamberović

  4. Mining and Metallurgy Institute Bor, Zeleni bulevar 35, 19210, Bor, Serbia

    Silvana B. Dimitrijević

  5. Vinča Institute of Nuclear Sciences, University of Belgrade, p.fah 522, 11001, Belgrade, Serbia

    Miodrag Mitrić

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  1. Stevan P. Dimitrijević
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Correspondence to Stevan P. Dimitrijević.

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Dimitrijević, S.P., Manasijević, D., Kamberović, Ž. et al. Experimental Investigation of Microstructure and Phase Transitions in Ag-Cu-Zn Brazing Alloys. J. of Materi Eng and Perform 27, 1570–1579 (2018). https://doi.org/10.1007/s11665-018-3258-1

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  • DOI: https://doi.org/10.1007/s11665-018-3258-1

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