fem at CALPHAD 2024: Development of new Nb-Ni-Ta based active brazing alloys

Last week Lisa-Yvonn Schmitt had the great pleasure to attend the CALPHAD LI International Conference on Computer Coupling of Phase Diagrams and Thermochemistry in Mannheim/Germany. She presented the work, which was done at fem Forschungsinstitut together with her colleagues Frank König and Dr. Ulrich E. Klotz, on the Nb-Ni-Ta liquidus projection using the CALPHAD approach. This study is related to the collaborative research project LotLeg on the development of new Nb-Ni-Ta based active brazing alloys, which was carried out in cooperation with the industrial user committee and our research partner Fraunhofer IKTS.

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Active brazing allows direct wetting of the components to be joined and makes the process a more cost effective one step process. The use of Nb-Ni-Ta alloys allows the application at higher temperatures, as required for turbine repair or heat resistant components, while providing high oxidation and corrosion resistance. CALPHAD-based calculations led to the identification of promising candidate alloys, which were then investigated experimentally. Subsequent high-throughput calculations enabled the alloy compositions to be optimised for improved properties.

You can find more information about our project LotLeg here: Project LotLeg


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