Image icon  Devitrified Glass: glass sample heated at 900°C for 17 hours.

 
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Attribution text: By Dr K M Knowles, DoITPoMS, released under CC BY-NC-SA 2.0 license
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Description: During the devitrification process, the glass changes from being completely amorphous to partially crystalline, as it adsorbs moisture from the atmosphere. Devitrified glass has a frosty or cloudy, iridescent appearance. Devitrification occurs naturally over long periods of time, but can be induced by heating to high temperatures for prolonged periods of time.
Keywords: ceramic • devitrification • glass • silica • displacement • indentation • Plasticine
Categories: Science approaches > Microstructure
Materials > Ceramics & glasses > Glasses
Testing, analysis & experimentation > Metallography
Scale > Micro
Created by: DoITPoMS, University of Cambridge
Dr K M Knowles, Department of Materials Science and Metallurgy, University of Cambridge
Published by: DoITPoMS, University of Cambridge
License: This resource is released under the Creative Commons Attribution Non-Commercial Share Alike license (2.0 UK: England & Wales).
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Date created: 01 October 2002
Date added: 21 August 2009
Package: DoITPoMS Micrograph Library
Resource ID: 1575