| Autor: |
Karyev, Leonid, Zanina, Anna, Feodorov, Victor |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2015, p1-6, 6p, 1 Black and White Photograph, 5 Diagrams |
| Abstrakt: |
The behavior of internal surfaces of cleavage fracture in ionic crystals under complex thermoelectric effect was investigated. The experiment was carried out in case of normal and parallel orientation of the electric field lines to the investigated surface. Our basic research method lies in simultaneous influence of thermal and electric fields on the crystal. In case of normal orientation of electric field lines to the crack surface the formation of dislocation rosettes in temperature range of impurity conduction was observed. In the temperature range of intrinsic conduction authors detected the formation of single crystal outgrowths on the positively charged surface. The shape of rosettes and outgrowths depends on their relative location to the crack tip. When outgrowth reaches the opposite negatively charged surface it forms a bridge between cleavage shores. In these areas the restoration of continuity was observed. In case of parallel orientation of electric field lines to the surface authors observed the appearance of a new phase in the form of a jelly-like substance on the crack surface. The crack faces had a closing tendency due to the directed diffusion of cations to the crack edges. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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