HIGH-RESOLUION TRANSMISSION ELECTRON MICROSCOPY (HRTEM): IMAGE PROCESSING ANALYSIS OF DEFECTS AND GRAIN BOUNDARIES IN NANOCRYSTALINE MATERIALS

A. Tonejc
Faculty of Science, department of Physics, bijenicka c. 32, 10000 Zagreb, Croatia

ABSTRACT

A brief overview of the application of the high resolution transmission electron microscopy (HRTEM) method is given: the principle of HRTEM image formation in an electron microscope; different modes of image formation; the role of contrast transfer function (CTF) in HRTEM image formation; definition and improvement of electron microscope resolution. As an example. the image processing of HRTEM micrographs of mechanically alloyed ZrO₂ -10mol% Y₂O₃ powders was performed in order to obtain information about alloying and transformation at the atomic level.