Experimental Study of Non-Basal Dislocations in Ice Crystals
Abstract Structures produced by chemical etching on the basal plane of ice crystals have been studied and are discussed in terms of non-basal glide features. Slip bands, revealed by parallel rows of etch pits, generally result from a rapidly applied stress. Etch channels were observed relatively rar...
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Cambridge University Press (CUP)
1965
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Online Access: | http://dx.doi.org/10.1017/s0022143000018682 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000018682 |
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crcambridgeupr:10.1017/s0022143000018682 2024-03-03T08:46:06+00:00 Experimental Study of Non-Basal Dislocations in Ice Crystals Levi, L. de Achaval, E. M. Suraski, E. 1965 http://dx.doi.org/10.1017/s0022143000018682 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000018682 en eng Cambridge University Press (CUP) Journal of Glaciology volume 5, issue 41, page 691-699 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1965 crcambridgeupr https://doi.org/10.1017/s0022143000018682 2024-02-08T08:37:11Z Abstract Structures produced by chemical etching on the basal plane of ice crystals have been studied and are discussed in terms of non-basal glide features. Slip bands, revealed by parallel rows of etch pits, generally result from a rapidly applied stress. Etch channels were observed relatively rarely in these experiments; they can be interpreted as trails of dislocations moving slowly under the action of local stresses, sometimes to stresses produced during the etching process. Features of the channels indicate that the dislocations emerging on the basal plane are screw dislocations; their Burgers vector was considered by previous authors to be in the direction <11 2 3>, gliding on {11 2 2}and {10 1 o} slip planes. This assumption is inconsistent with the changes of channel direction we observed, for which the {01 1 1}and {2 4 21}slip planes would have to be considered. As a simpler hypothesis the glide system 〈0001〉, {10 1 o} and 〈0001〉, {11 2 0}is proposed. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 5 41 691 699 |
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Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Levi, L. de Achaval, E. M. Suraski, E. Experimental Study of Non-Basal Dislocations in Ice Crystals |
topic_facet |
Earth-Surface Processes |
description |
Abstract Structures produced by chemical etching on the basal plane of ice crystals have been studied and are discussed in terms of non-basal glide features. Slip bands, revealed by parallel rows of etch pits, generally result from a rapidly applied stress. Etch channels were observed relatively rarely in these experiments; they can be interpreted as trails of dislocations moving slowly under the action of local stresses, sometimes to stresses produced during the etching process. Features of the channels indicate that the dislocations emerging on the basal plane are screw dislocations; their Burgers vector was considered by previous authors to be in the direction <11 2 3>, gliding on {11 2 2}and {10 1 o} slip planes. This assumption is inconsistent with the changes of channel direction we observed, for which the {01 1 1}and {2 4 21}slip planes would have to be considered. As a simpler hypothesis the glide system 〈0001〉, {10 1 o} and 〈0001〉, {11 2 0}is proposed. |
format |
Article in Journal/Newspaper |
author |
Levi, L. de Achaval, E. M. Suraski, E. |
author_facet |
Levi, L. de Achaval, E. M. Suraski, E. |
author_sort |
Levi, L. |
title |
Experimental Study of Non-Basal Dislocations in Ice Crystals |
title_short |
Experimental Study of Non-Basal Dislocations in Ice Crystals |
title_full |
Experimental Study of Non-Basal Dislocations in Ice Crystals |
title_fullStr |
Experimental Study of Non-Basal Dislocations in Ice Crystals |
title_full_unstemmed |
Experimental Study of Non-Basal Dislocations in Ice Crystals |
title_sort |
experimental study of non-basal dislocations in ice crystals |
publisher |
Cambridge University Press (CUP) |
publishDate |
1965 |
url |
http://dx.doi.org/10.1017/s0022143000018682 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000018682 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 5, issue 41, page 691-699 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000018682 |
container_title |
Journal of Glaciology |
container_volume |
5 |
container_issue |
41 |
container_start_page |
691 |
op_container_end_page |
699 |
_version_ |
1792501994288578560 |