Manufacture and characterization of a multifilament MgB2 superconducting wire




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In comparison with high-temperature superconducting tapes, MgB2 wires have the advantage of being at least one order of magnitude cheaper and therefore very interesting for several power applications in spite of their relatively low operation temperature. For applications involving alternative current, energy losses appear and need to be minimized. This can be achieved by dividing the ceramic MgB2 central core of the wire into finer filaments. State-of-the-art processing of MgB2 for high magnetic field applications require doping with carbon-containing additives, which often release gas species during heat treatment. It is not clear, how far the relative location of the filaments in a multifilament wire has an influence on the kinetics of gas release and superconducting performance of the individual filaments, while this could have a significant importance for the current transport capacity of the wire as a whole.

The goal of this project is to produce a multifilament MgB2 wire using the in-situ technique, investigate the influence of filament locations on their microstructure, phase purity and superconducting properties. The main outcome is expected to be a set of guidelines on, how to improve the critical current density of multifilament MgB2 wires.


During this project you are going to:

-Manufacture a multifilament MgB2 superconducting wire using the in-situ reaction process.

-Conduct microstructural characterization of your samples by means of X-ray diffraction, optical and electron microscopy as well as energy dispersive spectroscopy.

-Perform magnetization measurements at cryogenic temperatures to evaluate the superconducting performance of your samples. Characterisation of the individual filaments may also be done by magneto-optical observations in collaboration with the university of Oslo.

-Analyze your experimental results using state of the art theoretical models.


Learning objectives:

At the end of this project you will be able to:

-Manufacture MgB2 superconducting wires (preparation of precursor powders, mechanical deformation and heat treatments).

-Use various experimental characterization tools (X-ray diffraction, electron microscopy, magnetization measurements, etc.) and explain their basic principles as well as limitations.

-Critically evaluate your results.

-Draw links between microstructure and performance.

-Perform an efficient literature search and compare your own results to published data.

-Present your results to a scientific audience under conditions equivalent to an international conference.

-Write the draft of a scientific publication. 


Contact: Jean-Claude Grivel ( – DTU Energy, building 301 (from 11/2019)

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DTU Energi


Jean-Claude Grivel





Kandidatuddannelsen i Bæredygtig Energi


Jean-Claude Grivel






DTU er et teknisk eliteuniversitet med international rækkevidde og standard. Vores mission er at udvikle og nyttiggøre naturvidenskab og teknisk videnskab til gavn for samfundet. 10.000 studerende uddanner sig her til fremtiden, og 5.700 medarbejdere har hver dag fokus på uddannelse, forskning, myndighedsrådgivning og innovation, som bidrager til øget vækst og velfærd.

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