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Simple procedure for phase identification using convergent beam electron diffraction patterns
Author(s) -
Kim GyeungHo,
Kim HyeSung,
Kum DongWha
Publication year - 1996
Publication title -
microscopy research and technique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 118
eISSN - 1097-0029
pISSN - 1059-910X
DOI - 10.1002/(sici)1097-0029(19960415)33:6<510::aid-jemt6>3.0.co;2-o
Subject(s) - phase (matter) , diffraction , volume (thermodynamics) , electron diffraction , basis (linear algebra) , zone axis , microstructure , simple (philosophy) , beam (structure) , cathode ray , crystallography , electron , optics , materials science , mathematics , chemistry , physics , geometry , thermodynamics , philosophy , organic chemistry , epistemology , quantum mechanics
Abstract The use of the primitive cell volume and the zero order Laue zone (ZOLZ) pattern is proposed as a means to identify phases in a complex microstructure. A single convergent beam pattern, containing a higher order Laue zone ring, from a nanosized region is sufficient to calculate the primitive cell volume of the phase, while ZOLZ pattern is used to determine the zone axis of the crystal. A computer program is used to screen out possible phases on the basis of the value of measured cell volume. The indexing of the ZOLZ pattern follows in the program to find the zone axis of the identified phase. Combination of these two methods ensures accuracy and reliability of phase identification from a single CBED pattern. An example of the analysis is given from the rapidly solidified Al‐Al 3 Ti system. © 1996 Wiley‐Liss, Inc.