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DOI	10.1029/2019JB018383
	In Situ Quantitative Tensile Testing of Antigorite in a Transmission Electron Microscope
	Idrissi H.; Samaee V.; Lumbeeck G.; van der Werf T.; Pardoen T.; Schryvers D.; Cordier P.
发表日期	2020
ISSN	21699313
卷号	125 期号:3
英文摘要	The determination of the mechanical properties of serpentinites is essential toward the understanding of the mechanics of faulting and subduction. Here we present the first in situ tensile tests on antigorite in a transmission electron microscope. A push-to-pull deformation device is used to perform quantitative tensile tests, during which force and displacement are measured, while the evolving microstructure is imaged with the microscope. The experiments have been performed at room temperature on 2 × 1 × 0.2 μm3 beams prepared by focused ion beam. The specimens are not single crystals despite their small sizes. Orientation mapping indicated that several grains were well oriented for plastic slip. However, no dislocation activity has been observed even though the engineering tensile stress went up to 700 MPa. We show also that antigorite does not exhibit a purely elastic-brittle behavior since, despite the presence of defects, the specimens accumulate permanent deformation and did not fail within the elastic regime. Instead, we observe that strain localizes at grain boundaries. All observations concur to show that under these experimental conditions, grain boundary sliding is the dominant deformation mechanism. This study sheds a new light on the mechanical properties of antigorite and calls for further studies on the structure and properties of grain boundaries in antigorite and more generally in phyllosilicates. ©2020. The Authors.
英文关键词	antigorite; grain boundary sliding; nanomechanical testing; rheology; transmission electron microscopy
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187912
作者单位	Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium; Electron Microscopy for Materials Science, University of Antwerp, Antwerp, Belgium; Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207-UMET-Unité Matériaux et Transformations, Lille, France; Institut Universitaire de France, Paris, France
推荐引用方式 GB/T 7714	Idrissi H.,Samaee V.,Lumbeeck G.,et al. In Situ Quantitative Tensile Testing of Antigorite in a Transmission Electron Microscope[J],2020,125(3).
APA	Idrissi H..,Samaee V..,Lumbeeck G..,van der Werf T..,Pardoen T..,...&Cordier P..(2020).In Situ Quantitative Tensile Testing of Antigorite in a Transmission Electron Microscope.Journal of Geophysical Research: Solid Earth,125(3).
MLA	Idrissi H.,et al."In Situ Quantitative Tensile Testing of Antigorite in a Transmission Electron Microscope".Journal of Geophysical Research: Solid Earth 125.3(2020).