EBSD analysis of MgB2 bulk superconductors

Abstract : The grain orientation, the texture and the grain boundary misorientations are important parameters for the understanding of the magnetic properties of the bulk MgB2 samples intended for super-magnet applications. Such data can be provided by electron backscatter diffraction (EBSD) analysis. However, as the grain size of the MgB2 bulks is preferably in the 100-200 nm range, the common EBSD technique working in reflection operates only properly on highly dense samples. In order to achieve a reasonably good Kikuchi pattern quality on all samples, we apply here the newly developed transmission EBSD (t-EBSD) technique to several bulk MgB2 samples. This method requires the preparation of TEM slices by means of focused ion-beam milling, which are then analyzed within the SEM, operating with a specific sample holder. We present several EBSD mappings of samples prepared with different techniques and at various reaction temperatures.
Keywords : MgB2 microstructure EBSD
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Contributor : Kévin Berger <>
Submitted on : Saturday, February 6, 2016 - 7:37:30 PM
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Anjela Koblischka-Veneva, Michael Koblischka, Jörg Schmauch, Kazuo Inoue, Miryala Muralidhar, et al.. EBSD analysis of MgB2 bulk superconductors. PASREG 2015 - 9th International Workshop on Processing and Applications of Superconducting (RE)BCO Large Grain Materials, Sep 2015, Liège, Belgium. ⟨hal-01237343⟩

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