Characterization of the glide planes of the [001] screw dislocations in olivine using electron tomography
Characterization of the glide planes of the [001] screw dislocations in olivine using electron tomography
复制标题
使用电子断层扫描技术表征橄榄石中 [001] 螺旋位错的滑移面
DOI：
10.1007/s00269-014-0665-1
复制
发表时间：
2014
影响因子：
1.4
通讯作者：
Claude Vanmansart
中科院分区：
文献类型：
--
作者：
A. Mussi;P. Cordier;S. Demouchy;Claude Vanmansart
摘要
Abstract
A San Carlos olivine polycrystal has been deformed under uppermost mantle conditions, by compression at 900 °C, at a strain rate of 1.1 × 10−5 s−1, under a confining pressure of 300 MPa, using the Paterson press. Transmission electron tomography of dislocations has been performed by scanning transmission electron microscopy, by conventional transmission electron microscopy using the weak-beam dark-field technique, associated with precession or not, in order to determine the glide planes of [001] screw dislocations. This recent technique is the most suitable one since most [001] dislocations exhibit straight screw segments due to the high lattice friction on this character at low temperature. We find that [001] dislocations glide in (100), (010) and {110} as already reported, but also more unexpectedly in {120} and {130}. We show that at 900 °C, [001] {110} glide is dominant in polycrystals. We have, however, noted and characterized numerous cross-slip events in the specimen.
影响因子：
2.2
作者：
PENCZEK, P;RADERMACHER, M;FRANK, J
通讯作者：
FRANK, J