FIZIKA A 10 (2001) 4 , 177-190

STRUCTURE OF BALL MILLED ZrO₂ AND ZrO₂ -10 mol % Y₂O₃ POWDERS REVEALED BY HRTEM IMAGE PROCESSING

AN�ELKA M. TONEJC, IGOR DJERDJ and ANTUN TONEJC

Department of Physics, Faculty of Science, Bijeni�ka 32, POB 331, 10002 Zagreb, Croatia
E-mail: [email protected]

Dedicated to Professor Kseno Ilakovac on the occasion of his 70^th birthday

Received 18 October 2001; Accepted 7 January 2002
Online 6 April 2002

High-resolution transmission electron microscope (HRTEM) image processing analysis is used to analyse and to compare the process of ball milling in pure ZrO₂ powders and in ZrO₂-10 mol % Y₂O₃ powders. Applying HRTEM image processing to the grain boundary region and other defects, we are able to observe, at the atomic level, a possible sequence of alloying and transition that occur at the grain boundary, in the overlapping layers and on the stacking faults.

PACS numbers: 61.43.Gt, 68.37.Lp
UDC 537.533.35

Keywords: ZrO₂ powder, ZrO₂-10 mol % Y2O₃ powder, ball milling, high-resolution transmission electron microscopy, image processing, grain boundaries, overlapping layers, stacking faults

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