The work of fracture in crystals of sodium chloride containing cavities
- 1 April 1968
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 17 (148) , 657-667
- https://doi.org/10.1080/14786436808223019
Abstract
The ratio (γ2 : γ1) of the work of fracture in crystals of sodium chloride containing known dispersions of one micron diameter cavities to that in normal crystals of sodium chloride, has been determined under dynamic conditions of cleavage. The method, based on measurements of the crack-velocity during cleavage, only permitted an order of magnitude calculation for γ2:γ1; nevertheless, the results show that dispersions of cavities with mean separations less than about 30 microns can increase the work of fracture of a crystal by at least two orders of magnitude. This increased work of fracture in the composite crystals can be correlated with the generation of cleavage steps when the crack intersects the cavities.Keywords
This publication has 4 references indexed in Scilit:
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- Direct Measurements of the Surface Energies of CrystalsJournal of Applied Physics, 1960
- Some kinetic considerations of the Griffith criterion for fracture—I Equations of motion at constant forceJournal of the Mechanics and Physics of Solids, 1960
- Cleavage Cracks and Dislocations in LiF CrystalsJournal of Applied Physics, 1958