CMF-13 RESEARCH ON CARBON AND GRAPHITE. Report No. 13. Summary of Progress from February 1--April 30, 1970. Page: 2 of 29
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CMF-13 RESEARCH ON CARBON AND GRAPHITE
REPORT NO. 13: SUMMARY OF PROGRESS FROM FEBRUARY 1 TO APRIL 30, 1970
by
Morton C. Smith1. INTRODUCTION
This is the thirteenth in a series of progress reports
devoted to carbon and graphite research in LASL Group
CMF-13, and summarizes work done during the months
of February, March, and April, 1970. It should be under-
stood that in such a progress report many of the data are
preliminary, incomplete, and subject to correction, and
many of the opinions and conclusions are tentative and
subject to change. This report is intended only to provide
up-to-date background information to those who are inter-
ested in the materials and programs described in it, and
should not be quoted or used as reference publicly or in
print.
Research and development on carbon and graphite
were undertaken by CMF-13 primarily to increase unuer-
standing of their properties and behavior as engineering
materials, to improve the raw materials and processes
used in their manufacture, and to learn how to produce
them with consistent, predictable, useful combinations of
properties. The approach taken is microstructural,
based on study and characterizatin of natural, commer-
cial, and experimental carbons and graphites by such
techniques as x-ray diffraction, electron and optical mi-
croscopy, and porosimetry. Physical and mechanical
properties are measured as functions of formulation,
treatment, and environmental variables, and correlations
are sought among properties and structures. Raw mater-
ials and manufacturing techniques are investigated, im-
proved, and varied systematically in an effort to create
specific internal structures believed to be responsible fordesirable combinations of properties. Prompt feedback
of information among these activities then makes possible
progress in all of them toward their common goal of unri -
standing and improving manufactured carbons and graph-
ites.
Since its beginning, this research has been sponsored
by the Division of Space Nuclear Systems of the United
States Atomic Energy Commission, through the Space
Nuclear Propulsion Office. More recently additional gen-
eral support for it has been provided by the Office of Ad-
vanced Research and Technology of the National Aeronau-
tics and Space Administration. Many of its facilities and
services have been furnished by the Division of Military
Application of AEC. The direct and indirect support and
the guidance and encouragement of these agencies of the
United States Government are gratefully acknowledged.
II. SANTA MARIA COKE
A. Previous Work
CMF-13 investigations of Santa Maria petrweum coke
and of graphites made from it have previously been sum-
marized in the ninth, tenth, eleventh, and twelfth reports
in this series.
B. Grinding (R. J. Imprescia)
Specimen 63J-2, described on page 13 of Report No.
12, cracked into two pieces during the hot-molding cycle.
Test bars machined from these pieces demonstrated that-
aside from its tendency to crack--this graphite had unusu-1
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Smith, M.C. CMF-13 RESEARCH ON CARBON AND GRAPHITE. Report No. 13. Summary of Progress from February 1--April 30, 1970., report, January 1, 1970; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc864928/m1/2/?rotate=90: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.