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EFFECTS OF ANNEALING ON THE STRUCTURE OF PYROLYTIC GRAPHITE

Author
Stover, E. R.
Published
[Place of publication not identified] : [publisher not identified], 1960.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1960.
Physical Description
microopaque : positive ; 8 x 13 cm

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Summary
Pyrolytic graphite contains sheets of disordered graphite layers arranged in small crystals separated by tilt boundaries, so that continuous atomic planes may be wrinkled. Upon heating to a critical temperature, ordering between layers leads to an effective straightening of the sheets. This process was studied in a variety of pyrolytic deposits by annealing to successively higher temperatures. Isothermal transformation was followed in one case by observing dimensional changes during annealing. Three stages of annealing are distinguished, and deposits are classified according to the temperatures at which different amounts of transformation occur. (auth)
Report Numbers
TID-12542; 60-RL-2564M
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
NSA number: NSA-15-017325
OSTI Identifier 4022989
Research organization: General Electric Co. Research Lab., Schenectady, N.Y.
View MARC record | catkey: 42249060