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Crystal orientation mapping via ion channeling: An alternative to EBSD.

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      Abstract

      A new method, which we name ion CHanneling ORientation Determination (iCHORD), is proposed to obtain orientation maps on polycrystals via ion channeling. The iChord method exploits the dependence between grain orientation and ion beam induced secondary electron image contrast. At each position of the region of interest, intensity profiles are obtained from a series of images acquired with different orientations with respect to the ion beam. The profiles are then compared to a database of theoretical profiles of known orientation. The Euler triplet associated to the most similar theoretical profile gives the orientation at that position. The proof-of-concept is obtained on a titanium nitride sample. The potentialities of iCHORD as an alternative to EBSD are then discussed.

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      Affiliations
      [1 ] University of Lyon - INSA de Lyon - CNRS, MATEIS, UMR 5510, Bât. Blaise Pascal, 20 Avenue Albert Einstein, 69621 Villeurbanne, France.
      [2 ] University of Lyon - CNRS, ILM, UMR 5306, Université Lyon I, Bât. A. Kastler, 10 rue A. Byron, 69622 Villeurbanne, France.
      [3 ] University of Lyon - CNRS, INL, UMR 5510, Bât. B. Pascal, INSA de Lyon/Université Lyon I, 69621 Villeurbanne, France.
      [4 ] Ecole Normale Supérieure de Lyon - CNRS, LGL, 46 allée d'Italie, 69364 Lyon, France.
      [5 ] University of Lyon - INSA de Lyon - CNRS, LIRIS, UMR 5205, INRIA, Bât. Blaise Pascal, 20 Avenue Albert Einstein, 69621 Villeurbanne, France.
      Journal
      Ultramicroscopy
      Ultramicroscopy
      Elsevier BV
      1879-2723
      0304-3991
      Oct 2015
      : 157
      26094201 S0304-3991(15)00134-5 10.1016/j.ultramic.2015.05.023

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