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A Transmission Electron Microscope Study of Experimentally Shocked Pregraphitic CarbonA transmission electron microscope study of experimental shock metamorphism in natural pre-graphitic carbon simulates the response of the most common natural carbons to increased shock pressure. The d-spacings of this carbon are insensitive to the shock pressure and have no apparent diagnostic value, but progressive comminution occurs in response to increased shock pressure up to 59.6 GPa. The function, P = 869.1 x (size(sub minimum )(exp -0.83), describes the relationship between the minimum root-mean-square subgrain size (nm) and shock pressure (GPa). While a subgrain texture of natural pregraphitic carbons carries little information when pre-shock textures are unknown, this texture may go unnoticed as a shock metamorphic feature.
Document ID
19990010761
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
Authors
Rietmeijer, Frans J. M.
(New Mexico Univ. Albuquerque, NM United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1995
Publication Information
Publication: Carbon
Publisher: Elsevier Science Ltd.
Volume: 33
Issue: 6
ISSN: 0008-6223
Subject Category
Geophysics
Funding Number(s)
CONTRACT_GRANT: NAGw-3626
CONTRACT_GRANT: NAG9-160
Distribution Limits
Public
Copyright
Other

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