| Issue |
J. Phys. Colloques
Volume 51, Number C1, Janvier 1990
Proceeding of the International CongressIntergranular and Interphase Boundaries in materials |
|
|---|---|---|
| Page(s) | C1-317 - C1-322 | |
| DOI | https://doi.org/10.1051/jphyscol:1990150 | |
DOI: 10.1051/jphyscol:1990150
STUDY OF THE STRUCTURE AND DYNAMIC BEHAVIOUR OF GRAIN BOUNDARIES USING DYNAMIC BALL-MODEL
R. PINO PLASENCIA, D.L. BEKE, G. ERDÉLYI et F.J. KEDVESDepartment of Solid State Physics, L. Kossuth University, H-4010 Debrecen, PO. Box 2, Hungary
Abstract
The structures of symmetrical <111> tilt boundaries, formed in a two-dimensional array of steel balls placed (between two glass-sheets) into an alternating magnetic field, were investigated. It was observed that coincidence Σ13, Σ39, Σ7, Σ19, and Σ37 boundaries were more or less ordered and their structure can be composed of mixtures of two (slightly distorted) structural units. Different defects (e.g. volume and grain-boundary dislocations, steps, faceting) can also be observed ; their presence caused difficulties in identification of the periodicity in boundaries investigated. It was shown for an asymmetrical Σ7 boundary that energetically a curved boundary was more favourable than a plane one. Having increased the intensity of the magnetic field the dynamic properties of grain-boundaries (grain-boundary migration, diffusion) can also be visualized by a videotape-recording.