Grain Boundary groove on ice surfaces
Abstract
The grain boundary groove formed at the ice surface of a bicrystal with < 10bar10>/60^o misorientation is studied. Samples are thermostatized in a transparent box, sealed so as to attain the vapor - ice equilibrium pressure at the ice surface. The time evolution of the groove width is registered for a lapse of 24 hs and sample temperatures of -2 and -12^o C. The results obtained are analyzed taking into account the different theories developed to explain the groove growth. It is found that the obtained results can be satisfactorily explained considering that the groove is formed by surface diffusion. At -9^o C an abrupt decrease in the rate of groove growth is observed. This change shows a variation on the surface structure which can be related to the vanishing of the quasi-liquid layer normally found on ice surfaces at high temperatures
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2000
- Bibcode:
- 2000APS..MARF36020N