PLASTIC DEFORMATION OF WADSLEYITE: I. HIGH-PRESSURE DEFORMATION IN COMPRESSION
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dc.contributor.author | Thurel E. | |
dc.contributor.author | Cordier P. | |
dc.date.accessioned | 2022-02-13T04:46:05Z | |
dc.date.available | 2022-02-13T04:46:05Z | |
dc.date.issued | 2003 | |
dc.identifier | https://elibrary.ru/item.asp?id=5092804 | |
dc.identifier.citation | Physics and Chemistry of Minerals, 2003, 30, 5, 256-266 | |
dc.identifier.issn | 0342-1791 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/35250 | |
dc.description.abstract | We have studied the plastic deformation of Mg2SiO4 wadsleyite polycrystals. Wadsleyite was synthesized from a forsterite powder in a multianvil apparatus. It was then recovered and placed in a second multianvil assembly designed to induce plastic deformation by compression between two hard alumina pistons. After the deformation experiment, the microstructures are characterized by transmission electron microscopy (TEM) and large-angle convergent beam electron diffraction (LACBED). Deformation experiments have been carried out at 15-19 GPa and at temperatures ranging from room temperature to 1800-2000 °C. Five different dislocation types have been identified by LACBED: [100], 1/2<111>, [010], <101> and [001]. The [001] dislocations result from dislocation reactions and not from activation of a slip system. The [010] dislocations are activated under high stresses at the beginning of the experiments and further relax by decomposition into 1/2<111> dislocations or by dissociation into four 1/4[010] partial dislocations. The following slip systems have been identified: 1/2<111>{101}, [100](010), [100](001), [100]{011}, [100]{021}, [010](001), [010]{101} and <101>(010). | |
dc.subject | PLASTIC DEFORMATION | |
dc.subject | DISLOCATION | |
dc.subject | SLIP SYSTEM | |
dc.subject | HIGH PRESSURE | |
dc.subject | TEM | |
dc.title | PLASTIC DEFORMATION OF WADSLEYITE: I. HIGH-PRESSURE DEFORMATION IN COMPRESSION | |
dc.type | Статья |
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