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Microstructure and Mechanical Performance of Cu-Sn-Ti-Based Active Braze Alloy Containing In Situ Formed Nano-Sized TiC Particles

Leinenbach, Christian ; Transchel, Robert ; Gorgievski, Klea ; Kuster, Friedrich ; Elsener, Hans ; Wegener, Konrad

In: Journal of Materials Engineering and Performance, 2015, vol. 24, no. 5, p. 2042-2050

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    Title
    • Microstructure and Mechanical Performance of Cu-Sn-Ti-Based Active Braze Alloy Containing In Situ Formed Nano-Sized TiC Particles
    Author
    • Leinenbach, Christian. Empa, Swiss Federal Laboratories for Material Science and Technology, Überlandstrasse 129, 8600, Dübendorf, Switzerland
    • Transchel, Robert. Empa, Swiss Federal Laboratories for Material Science and Technology, Überlandstrasse 129, 8600, Dübendorf, Switzerland
    • Gorgievski, Klea. Empa, Swiss Federal Laboratories for Material Science and Technology, Überlandstrasse 129, 8600, Dübendorf, Switzerland
    • Kuster, Friedrich. Institute of Machine Tools and Manufacturing (IWF), ETH Zurich, Tannenstrasse 3, 8092, Zurich, Switzerland
    • Elsener, Hans. Empa, Swiss Federal Laboratories for Material Science and Technology, Überlandstrasse 129, 8600, Dübendorf, Switzerland
    • Wegener, Konrad. Institute of Machine Tools and Manufacturing (IWF), ETH Zurich, Tannenstrasse 3, 8092, Zurich, Switzerland
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Journal of Materials Engineering and Performance, 2015, vol. 24, no. 5, p. 2042-2050. Springer US; http://www.springer-ny.com
    Other Version
    OAI-PMH Identifier
    • oai:doc.rero.ch:331704
    Summary
    A Cu-Sn-Ti-based active brazing filler alloy was in situ reinforced with nanosized TiC particles by adding different amounts of a cellulose nitride-based binder. The TiC particles emanate from a reaction of the Ti within the filler alloy with the carbon from the binder that does not decompose completely during heating. The correlation between the microstructure and mechanical performance was studied. In addition, the effect of different binder amounts on the shear strength and cutting performance of brazed diamond grains was studied in shear tests and single grain cutting tests. The results clearly show that the mechanical performance of the brazed diamond grains can be improved by the formation of TiC particles. This is attributed to particle strengthening of the filler alloy matrix as well as to the decreasing grain size and more homogeneous distribution of the (Cu,Sn)3Ti5 phase with increasing amount of binder.