Japan Geoscience Union Meeting 2016

Presentation information


Symbol M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS12] Interface- and nano-phenomena on crystal growth and dissolution

Sun. May 22, 2016 9:00 AM - 10:30 AM A07 (APA HOTEL&RESORT TOKYO BAY MAKUHARI)

Convener:*Yuki Kimura(Institute of Low Temperature Science, Hokkaido University), Hitoshi Miura(Graduate School of Natural Sciences, Department of Information and Biological Sciences, Nagoya City University), Katsuo Tsukamoto(Graduate School of Engineering, Osaka University), Hisao Satoh(Naka Energy Research Laboratory, Mitsubishi Materials Corporation), Chair:Hisao Satoh(Naka Energy Research Laboratory, Mitsubishi Materials Corporation)

9:45 AM - 10:00 AM

[MIS12-03] Euler angle calculation and evaluation for orientation indexing of Electron Backscatter Diffraction(EBSD)

*hirobumi morita1, Jenny Goulden2 (1.Oxford Instruments KK, 2.Oxford Instruments Nanaoanalysis)

Keywords:Euler angle, EBSD

Recently Electron Backscatter Diffraction (EBSD) with Scanning Electron Microscope (SEM) is applied to geological science, which is also called SEM-EBSD method. There has been a plenty of application results of cubic crystal systems in metallurgy field. But the lower symmetry crystal system such as 180 degrees symmetry is more interested in wide variety of field, e.g. metallurgy, semiconductor, geology and also in more complicated materials. Those crystal system examples are hexagonal, tetragonal, etc.
EBSD identifies Kikuchi pattern and indexes the orientation. As of symmetry of Kikuchi pattern, some orientation and measurement condition cannot index the orientation right in a single solution, having pseudo-symmetric plurality. The sample has to be tilted 70 degrees. Tilt direction, detector to sample orientation, SEM scanning direction, etc. affect the orientation determination significantly. Three dimensional orientations are defined as following Bunge convention [1][2][3]. But Euler angle calculated from Kikuchi pattern often changes with the acquisition coordinate system. I would introduce each acquisition coordinate system and Euler angle results and how to interpret the Euler angle results, specifically for hexagonal and tetragonal crystal systems.
1. Randle, V., and Engler, O., Texture Analysis, Macrotexture, Microtexture and Orientation Mapping, Taylor and Francis, 2000, ISBN 9056992244
2. Bunge, H.J. 1982. Texture Analysis in Materials Science – Mathematical Methods. Butterworths, London.
3. Bunge, 1993, Texture Analysis in Materials Science, ISBN 3-928815-18-4)