Water ice phases II, III, and V - Plastic deformation and phase relationships

Details Water ice phases II, III, and V - Plastic deformation and phase relationships Water ice phases II, III, and V - Plastic deformation and phase relationships

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....9310191d&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Sept. 10, 1988, p. 10191-10208. Research supported by Alexander von H

Physics

16

Ice Formation, Natural Satellites, Outer Planets Explorers, Phase Diagrams, Plastic Deformation, Water, High Pressure, Pressure Distribution, Solar System, Temperature Profiles

Scientific paper

The ordinary water phase I was transformed to the ice phases that are known to exist in the interiors of large ice moons, such as Ganymede and Callisto for the purpose of investigating plastic deformation behavior of these ices. Ices II, III, and V were prepared using an apparatus and techniques similar to those described by Durham et al. (1983) and subsequently deformed in a gas deformation apparatus, and their deformation data were obtained. It was found that ice II was the strongest of the high-pressure phases, with a strength that was comparable to that of ice I; ice III was very weak, with the flow rate 100 to 1000 times higher than that of ice II at the same levels of stress. It was also found that ices III and V can exist metastably within the ice II field and that they may be deformed plastically within much of the metastable region without reverting to ice II. It is suggested that the weakness of the ice III phase may have profoundly influenced the evolution and the present-day behavior of the icy moons.

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