Microstructure through an Ice Sheet-Reference-Cited by-同舟云学术

Microstructure through an Ice Sheet

Published:2013-03 Issue: Volume:753 Page:481-484
ISSN:1662-9752
Container-title:Materials Science Forum
language:
Short-container-title:MSF

Author:

Binder Tobias¹,Weikusat Ilka²,Freitag Johannes²,Garbe Christoph S.¹,Wagenbach Dietmar³,Kipfstuhl Sepp²

Affiliation:

1. Universität Heidelberg

2. Alfred Wegener Institute for Polar and Marine Research

3. Institut für Umweltphysik, Universität Heidelberg

Abstract

Ice cores through an ice sheet can be regarded as a sample of a unique natural deformation experiment lasting up to a million years. Compared to other geological materials forming the earth‘s crust, the microstructure is directly accessible over the full depth. Controlled sublimation etching of polished ice sections reveals pores, air bubbles, grain boundaries and sub-grain boundaries at the surface. The microstructural features emanating at the surface are scanned. A dedicated method of digital image processing has been developed to extract and characterize the grain boundary networks. First preliminary results obtained from an ice core drilled through the Greenland ice sheet are presented. We discuss the role of small grains in grain size analysis and derive from the shape of grain boundaries the acting driving forces for grain boundary migration.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

https://www.scientific.net/MSF.753.481.pdf

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