Microstructure mapping: a new method for imaging deformation-induced microstructural features of ice on the grain scale
Microstructure mapping: a new method for imaging deformation-induced microstructural features of ice on the grain scale
复制标题
微观结构映射：一种在晶粒尺度上成像变形引起的冰微观结构特征的新方法
DOI：
10.3189/172756506781828647
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发表时间：
2006
影响因子：
3.4
通讯作者：
N. Azuma
中科院分区：
文献类型：
--
作者：
S. Kipfstuhl;I. Hamann;A. Lambrecht;J. Freitag;S. H. Faria;D. Grigoriev;N. Azuma
摘要本研究提出了一种在显微分辨率（3-4 μm像素-1）下绘制与变形相关的升华图案的方法。该方法是基于系统升华的一个切片的冰块，准备作为一个厚或薄的部分。测绘系统由光学显微镜、CCD摄像机和计算机控制的XY载物台组成。大约需要1500张图像来构建4.5 × 9 cm截面的高分辨率镶嵌图。马赛克和单一图像用于获得各种统计数据的空气夹杂物（气泡和空气笼形水合物），纹理（晶粒尺寸，形状和方向）和变形相关的功能（亚晶界，滑移带，亚晶粒岛和环，钉扎和凸起晶界）。最常见的升华模式进行了描述，并简要讨论了其相关的极地冰的变形。
Abstract This work presents a method of mapping deformation-related sublimation patterns, formed on the surface of ice specimens, at microscopic resolution (3–4 μm pixel−1). The method is based on the systematic sublimation of a microtomed piece of ice, prepared either as a thick or a thin section. The mapping system consists of an optical microscope, a CCD video camera and a computer-controlled xy-stage. About 1500 images are needed to build a high-resolution mosaic map of a 4.5 × 9 cm section. Mosaics and single images are used to derive a variety of statistical data about air inclusions (air bubbles and air clathrate hydrates), texture (grain size, shape and orientation) and deformation-related features (subgrain boundaries, slip bands, subgrain islands and loops, pinned and bulged grain boundaries). The most common sublimation patterns are described, and their relevance for the deformation of polar ice is briefly discussed.